From kbanke at sbcglobal.net  Mon Aug  1 00:37:36 2016
From: kbanke at sbcglobal.net (Kerry Banke)
Date: Mon, 1 Aug 2016 04:37:36 +0000 (UTC)
Subject: [Laser] test
In-Reply-To: <67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
Message-ID: <931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>

Steve,Maybe someday we can do something as I live near San Diego and also have nobody to play optical comms with. I also have a few optical tools like an Advantest optical spectrum analyzer. Right now my hobby time is being spent on the developing a new power supply unit to power the next generation of HaM equipment on board the ISS. That'll probably be another year and a half till it's done.73 - Kerry N6IZW

      From: Steve J. Noll <sjnoll at ix.netcom.com>
 To: "n6gkj.cm98 at yahoo.com" <n6gkj.cm98 at yahoo.com>; Free Space LASER Communications <laser at mailman.qth.net> 
 Sent: Sunday, July 31, 2016 6:05 PM
 Subject: Re: [Laser] test
   
Roger that. No one to play with here either now.
Haven't done anything myself for years, but it's 'on the list.' Thinking 
about a beacon.
Since retiring from Advanced Photonix have been collecting 
electro-optical test equipment.
Keithley picoammeter, two monochromators covering UV to IR with some cal 
sources, EG&G photometers/radiometers/laser power meters with sensors, 
fast pulse generator, calibrated silicon photodiodes, UV & IR 
photodiodes, a pile of diode lasers, etc.
I see there was some lightwave activity in the 2015 June ARRL VHF 
contest, half of it from Canada.

73, Steve J. Noll WA6EJO
http://www.qrz.com/db/WA6EJO
https://www.linkedin.com/in/stevejnoll

On 7/31/2016 4:45 PM, Ron Simpson via Laser wrote:
> Seems no one plays with light anymore. I am the only ham for at least 50 miles plays with light... Sad
>
> Ron, N6GKJ
>? 
>
______________________________________________________________
Laser mailing list
Home: http://mailman.qth.net/mailman/listinfo/laser
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Laser at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


  

From eric.grejda at virtadpt.net  Mon Aug  1 13:47:43 2016
From: eric.grejda at virtadpt.net (Eric Grejda)
Date: Mon, 1 Aug 2016 10:47:43 -0700
Subject: [Laser] test
In-Reply-To: <20160731211309.395E4149B30C@mailman.qth.net>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.395E4149B30C@mailman.qth.net>
Message-ID: <20160801104743.d63bbb4a169ed0705726d19c@virtadpt.net>

On Sun, 31 Jul 2016 17:12:45 -0400
bernieS <bernies at panix.com> wrote:

> Thanks, I haven't seen any traffic on this list for a very long time, 
> and wondered if it was still working.

Reading you loud and clear.

-- 
Eric Grejda (KB3YFS)
PGP: 0x3651F89F / D04B D4D0 E5E2 5746 7CB7  05CA 1C92 4610 3651 F89F


From eric.grejda at virtadpt.net  Mon Aug  1 13:48:19 2016
From: eric.grejda at virtadpt.net (Eric Grejda)
Date: Mon, 1 Aug 2016 10:48:19 -0700
Subject: [Laser] test
In-Reply-To: <354419B3-5E92-4766-B756-54019F157CD0@generalrobots.com>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<354419B3-5E92-4766-B756-54019F157CD0@generalrobots.com>
Message-ID: <20160801104819.58665997d5b18335baa4de92@virtadpt.net>

On Sun, 31 Jul 2016 22:43:35 +0100
John McNulty <john at generalrobots.com> wrote:

> It's that photonic propagation time that does it ;-)

Maybe it was that dust storm last weekend tanking the transmission rate... :)

-- 
Eric Grejda (KB3YFS)
PGP: 0x3651F89F / D04B D4D0 E5E2 5746 7CB7  05CA 1C92 4610 3651 F89F


From Clschmalz at aol.com  Mon Aug  1 16:43:04 2016
From: Clschmalz at aol.com (Clschmalz at aol.com)
Date: Mon, 1 Aug 2016 16:43:04 -0400
Subject: [Laser] test
Message-ID: <5c8579.29797fe7.44d10e58@aol.com>

unsubscribe
 
 
In a message dated 8/1/2016 12:00:25 P.M. Mountain Daylight Time,  
eric.grejda at virtadpt.net writes:

On Sun,  31 Jul 2016 22:43:35 +0100
John McNulty <john at generalrobots.com>  wrote:

> It's that photonic propagation time that does it  ;-)

Maybe it was that dust storm last weekend tanking the transmission  rate... 
:)

-- 
Eric Grejda (KB3YFS)
PGP: 0x3651F89F / D04B D4D0  E5E2 5746 7CB7  05CA 1C92 4610 3651  F89F

______________________________________________________________
Laser  mailing list
Home: http://mailman.qth.net/mailman/listinfo/laser
Help:  http://mailman.qth.net/mmfaq.htm
Post:  mailto:Laser at mailman.qth.net

This list hosted by:  http://www.qsl.net
Please help support this email list:  http://www.qsl.net/donate.html


From w9sz.zack at gmail.com  Mon Aug  1 16:52:50 2016
From: w9sz.zack at gmail.com (Zack Widup)
Date: Mon, 1 Aug 2016 15:52:50 -0500
Subject: [Laser] test
In-Reply-To: <931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
	<931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
Message-ID: <CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>

I've been wanting to play around with laser comms for quite a long time. I
have various solid-state lasers and I have some lenses. I think I saw some
recommendations on what to use for detectors once but I can't find that
info now. What are best used for detectors?

73, Zack W9SZ


On Sun, Jul 31, 2016 at 11:37 PM, Kerry Banke <kbanke at sbcglobal.net> wrote:

> Steve,Maybe someday we can do something as I live near San Diego and also
> have nobody to play optical comms with. I also have a few optical tools
> like an Advantest optical spectrum analyzer. Right now my hobby time is
> being spent on the developing a new power supply unit to power the next
> generation of HaM equipment on board the ISS. That'll probably be another
> year and a half till it's done.73 - Kerry N6IZW
>
>       From: Steve J. Noll <sjnoll at ix.netcom.com>
>  To: "n6gkj.cm98 at yahoo.com" <n6gkj.cm98 at yahoo.com>; Free Space LASER
> Communications <laser at mailman.qth.net>
>  Sent: Sunday, July 31, 2016 6:05 PM
>  Subject: Re: [Laser] test
>
> Roger that. No one to play with here either now.
> Haven't done anything myself for years, but it's 'on the list.' Thinking
> about a beacon.
> Since retiring from Advanced Photonix have been collecting
> electro-optical test equipment.
> Keithley picoammeter, two monochromators covering UV to IR with some cal
> sources, EG&G photometers/radiometers/laser power meters with sensors,
> fast pulse generator, calibrated silicon photodiodes, UV & IR
> photodiodes, a pile of diode lasers, etc.
> I see there was some lightwave activity in the 2015 June ARRL VHF
> contest, half of it from Canada.
>
> 73, Steve J. Noll WA6EJO
> http://www.qrz.com/db/WA6EJO
> https://www.linkedin.com/in/stevejnoll
>
> On 7/31/2016 4:45 PM, Ron Simpson via Laser wrote:
> > Seems no one plays with light anymore. I am the only ham for at least 50
> miles plays with light... Sad
> >
> > Ron, N6GKJ
> >
> >
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

From sjnoll at ix.netcom.com  Mon Aug  1 17:15:34 2016
From: sjnoll at ix.netcom.com (Steve J. Noll)
Date: Mon, 1 Aug 2016 14:15:34 -0700
Subject: [Laser] test
In-Reply-To: <CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
	<931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
	<CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>
Message-ID: <2f8cd4b5-ef7c-7ed0-9650-e9fb370978f3@ix.netcom.com>

Silicon photodiodes match visible and near infrared lasers & LEDs well, 
are fast, and have reasonably large active areas.
Solar cell - essentially a silicon photodiode, but optimized for power 
generation, not small signal detection, slower, probably noisier, no 
gain, large area, good wavelength match.
Phototransistors also match said wavelengths well, have some gain, but 
are slower and have tiny active areas which are harder to get all of 
your light into.
Photoresistors are very slow responding, no gain, large areas, not bad 
wavelength-wise, but again, very slow response time.
Silicon avalanche photodiodes extremely fast, have gain, but take high 
voltage, expensive.
Photomultiplier tubes - if you're trying to set some extreme distance 
record. Take high voltage, very large sensitive area, tremendous gain, 
very fast, usually not great spectral match but gain makes up for it.

73, Steve WA6EJO


On 8/1/2016 1:52 PM, Zack Widup wrote:
> I've been wanting to play around with laser comms for quite a long time. I
> have various solid-state lasers and I have some lenses. I think I saw some
> recommendations on what to use for detectors once but I can't find that
> info now. What are best used for detectors?
>
> 73, Zack W9SZ
>


From bluegrassdakine at hotmail.com  Mon Aug  1 22:55:12 2016
From: bluegrassdakine at hotmail.com (Raymond Cote)
Date: Mon, 1 Aug 2016 21:55:12 -0500
Subject: [Laser] test
In-Reply-To: <2f8cd4b5-ef7c-7ed0-9650-e9fb370978f3@ix.netcom.com>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
	<931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
	<CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>
	<2f8cd4b5-ef7c-7ed0-9650-e9fb370978f3@ix.netcom.com>
Message-ID: <BAY405-EAS3373100011AA3CA0A701B07A9050@phx.gbl>

What kind of distance and at what power?  
Are you talking of bouncing a las off the moon reflector? 

Women and cats will do as they please, and men and dogs should just relax and get use to the idea. 

-Robert Heinlein

> On Aug 1, 2016, at 16:20, Steve J. Noll <sjnoll at ix.netcom.com> wrote:
> 
> Silicon photodiodes match visible and near infrared lasers & LEDs well, are fast, and have reasonably large active areas.
> Solar cell - essentially a silicon photodiode, but optimized for power generation, not small signal detection, slower, probably noisier, no gain, large area, good wavelength match.
> Phototransistors also match said wavelengths well, have some gain, but are slower and have tiny active areas which are harder to get all of your light into.
> Photoresistors are very slow responding, no gain, large areas, not bad wavelength-wise, but again, very slow response time.
> Silicon avalanche photodiodes extremely fast, have gain, but take high voltage, expensive.
> Photomultiplier tubes - if you're trying to set some extreme distance record. Take high voltage, very large sensitive area, tremendous gain, very fast, usually not great spectral match but gain makes up for it.
> 
> 73, Steve WA6EJO
> 
> 
>> On 8/1/2016 1:52 PM, Zack Widup wrote:
>> I've been wanting to play around with laser comms for quite a long time. I
>> have various solid-state lasers and I have some lenses. I think I saw some
>> recommendations on what to use for detectors once but I can't find that
>> info now. What are best used for detectors?
>> 
>> 73, Zack W9SZ
>> 
> 
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From sjnoll at ix.netcom.com  Mon Aug  1 23:37:47 2016
From: sjnoll at ix.netcom.com (Steve J. Noll)
Date: Mon, 1 Aug 2016 20:37:47 -0700
Subject: [Laser] test
In-Reply-To: <BAY405-EAS3373100011AA3CA0A701B07A9050@phx.gbl>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
	<931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
	<CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>
	<2f8cd4b5-ef7c-7ed0-9650-e9fb370978f3@ix.netcom.com>
	<BAY405-EAS3373100011AA3CA0A701B07A9050@phx.gbl>
Message-ID: <4928a4be-f780-e116-0dbd-dca7e1276610@ix.netcom.com>

Even NASA with their facilities didn't get a return from every laser 
shot to the retroreflector on the moon.
My best 2-way was 57.7 miles, 2.5 mW HeNe  & photomultipliers and it was 
easy. PMTs were probably not necessary. Never tried a longer distance.
I suspect any distance (short of the moon) is possible with reasonable 
equipment (not needing a lock-in amplifier, etc.,) as long as the two 
points are line-of-sight from each other.

73, Steve WA6EJO


On 8/1/2016 7:55 PM, Raymond Cote wrote:
> What kind of distance and at what power?
> Are you talking of bouncing a las off the moon reflector?
>
> Women and cats will do as they please, and men and dogs should just relax and get use to the idea.
>
> -Robert Heinlein
>
>> On Aug 1, 2016, at 16:20, Steve J. Noll <sjnoll at ix.netcom.com> wrote:
>>
>> Silicon photodiodes match visible and near infrared lasers & LEDs well, are fast, and have reasonably large active areas.
>> Solar cell - essentially a silicon photodiode, but optimized for power generation, not small signal detection, slower, probably noisier, no gain, large area, good wavelength match.
>> Phototransistors also match said wavelengths well, have some gain, but are slower and have tiny active areas which are harder to get all of your light into.
>> Photoresistors are very slow responding, no gain, large areas, not bad wavelength-wise, but again, very slow response time.
>> Silicon avalanche photodiodes extremely fast, have gain, but take high voltage, expensive.
>> Photomultiplier tubes - if you're trying to set some extreme distance record. Take high voltage, very large sensitive area, tremendous gain, very fast, usually not great spectral match but gain makes up for it.
>>
>> 73, Steve WA6EJO
>>
>>
>>> On 8/1/2016 1:52 PM, Zack Widup wrote:
>>> I've been wanting to play around with laser comms for quite a long time. I
>>> have various solid-state lasers and I have some lenses. I think I saw some
>>> recommendations on what to use for detectors once but I can't find that
>>> info now. What are best used for detectors?
>>>
>>> 73, Zack W9SZ
>>>


From w9sz.zack at gmail.com  Tue Aug  2 00:51:57 2016
From: w9sz.zack at gmail.com (Zack Widup)
Date: Mon, 1 Aug 2016 23:51:57 -0500
Subject: [Laser] test
In-Reply-To: <BAY405-EAS3373100011AA3CA0A701B07A9050@phx.gbl>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
	<931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
	<CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>
	<2f8cd4b5-ef7c-7ed0-9650-e9fb370978f3@ix.netcom.com>
	<BAY405-EAS3373100011AA3CA0A701B07A9050@phx.gbl>
Message-ID: <CANJxhWioGDFbeiFEm+KxADkyOEOFOYsO6rvgPCjL34st3zJLJA@mail.gmail.com>

What most hams use - maybe 5 mW lasers over 10-20 miles. VUCC would require
at most ~60 miles a couple times if the locations are worked out right.

73, Zack W9SZ


On Mon, Aug 1, 2016 at 9:55 PM, Raymond Cote <bluegrassdakine at hotmail.com>
wrote:

> What kind of distance and at what power?
> Are you talking of bouncing a las off the moon reflector?
>
> Women and cats will do as they please, and men and dogs should just relax
> and get use to the idea.
>
> -Robert Heinlein
>
> > On Aug 1, 2016, at 16:20, Steve J. Noll <sjnoll at ix.netcom.com> wrote:
> >
> > Silicon photodiodes match visible and near infrared lasers & LEDs well,
> are fast, and have reasonably large active areas.
> > Solar cell - essentially a silicon photodiode, but optimized for power
> generation, not small signal detection, slower, probably noisier, no gain,
> large area, good wavelength match.
> > Phototransistors also match said wavelengths well, have some gain, but
> are slower and have tiny active areas which are harder to get all of your
> light into.
> > Photoresistors are very slow responding, no gain, large areas, not bad
> wavelength-wise, but again, very slow response time.
> > Silicon avalanche photodiodes extremely fast, have gain, but take high
> voltage, expensive.
> > Photomultiplier tubes - if you're trying to set some extreme distance
> record. Take high voltage, very large sensitive area, tremendous gain, very
> fast, usually not great spectral match but gain makes up for it.
> >
> > 73, Steve WA6EJO
> >
> >
> >> On 8/1/2016 1:52 PM, Zack Widup wrote:
> >> I've been wanting to play around with laser comms for quite a long
> time. I
> >> have various solid-state lasers and I have some lenses. I think I saw
> some
> >> recommendations on what to use for detectors once but I can't find that
> >> info now. What are best used for detectors?
> >>
> >> 73, Zack W9SZ
> >>
> >
> > ______________________________________________________________
> > Laser mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/laser
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Laser at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

From mike at milisake.com  Tue Aug  2 08:49:16 2016
From: mike at milisake.com (Mike Long)
Date: Tue, 2 Aug 2016 08:49:16 -0400
Subject: [Laser] test
In-Reply-To: <931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
	<931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
Message-ID: <CAL9uovu7FiCEoRB2mJWFeCXEGom0EPEmNc74EEM6XXefoeFEvg@mail.gmail.com>

I'll be trying to drum up interest here in Michigan on 8/20 at the Spark in
the Park event (http://www.k8tb.org/sitp.htm).  I'll have a display table
where I'll have handouts (any recommendations on information to include?),
presentation board, and one or more homebrew transmitters and receivers
hopefully for both laser and LED sources. I already have a K3PGP
transmitter and receiver pair to demo.  Another I've thought about putting
together before the event is something with the Burr-Brown OPT101.

73,
Mike, W6RP
EN72

On Mon, Aug 1, 2016 at 12:37 AM, Kerry Banke <kbanke at sbcglobal.net> wrote:

> Steve,Maybe someday we can do something as I live near San Diego and also
> have nobody to play optical comms with. I also have a few optical tools
> like an Advantest optical spectrum analyzer. Right now my hobby time is
> being spent on the developing a new power supply unit to power the next
> generation of HaM equipment on board the ISS. That'll probably be another
> year and a half till it's done.73 - Kerry N6IZW
>
>       From: Steve J. Noll <sjnoll at ix.netcom.com>
>  To: "n6gkj.cm98 at yahoo.com" <n6gkj.cm98 at yahoo.com>; Free Space LASER
> Communications <laser at mailman.qth.net>
>  Sent: Sunday, July 31, 2016 6:05 PM
>  Subject: Re: [Laser] test
>
> Roger that. No one to play with here either now.
> Haven't done anything myself for years, but it's 'on the list.' Thinking
> about a beacon.
> Since retiring from Advanced Photonix have been collecting
> electro-optical test equipment.
> Keithley picoammeter, two monochromators covering UV to IR with some cal
> sources, EG&G photometers/radiometers/laser power meters with sensors,
> fast pulse generator, calibrated silicon photodiodes, UV & IR
> photodiodes, a pile of diode lasers, etc.
> I see there was some lightwave activity in the 2015 June ARRL VHF
> contest, half of it from Canada.
>
> 73, Steve J. Noll WA6EJO
> http://www.qrz.com/db/WA6EJO
> https://www.linkedin.com/in/stevejnoll
>
> On 7/31/2016 4:45 PM, Ron Simpson via Laser wrote:
> > Seems no one plays with light anymore. I am the only ham for at least 50
> miles plays with light... Sad
> >
> > Ron, N6GKJ
> >
> >
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

From paulc at snet.net  Tue Aug  2 09:45:01 2016
From: paulc at snet.net (Paul Cianciolo)
Date: Tue, 2 Aug 2016 09:45:01 -0400
Subject: [Laser] Anyone in Connecticut Interested in optical Comms??
Message-ID: <002801d1ecc4$1240b230$36c21690$@snet.net>

Hello Everyone,

I am just checking to see if anyone in Connecticut has joined the group and
is interested.
I am located in Harwinton CT and looking for others in the area interested.


Paul Cianciolo
W1VLF

WWW.Rescueelectronics.com





From bluegrassdakine at hotmail.com  Tue Aug  2 11:24:53 2016
From: bluegrassdakine at hotmail.com (Raymond Cote)
Date: Tue, 2 Aug 2016 10:24:53 -0500
Subject: [Laser] test
In-Reply-To: <CANJxhWioGDFbeiFEm+KxADkyOEOFOYsO6rvgPCjL34st3zJLJA@mail.gmail.com>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
	<931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
	<CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>
	<2f8cd4b5-ef7c-7ed0-9650-e9fb370978f3@ix.netcom.com>
	<BAY405-EAS3373100011AA3CA0A701B07A9050@phx.gbl>
	<CANJxhWioGDFbeiFEm+KxADkyOEOFOYsO6rvgPCjL34st3zJLJA@mail.gmail.com>
Message-ID: <BAY405-EAS203C4A34595CDD4A648D880A9050@phx.gbl>

Ok Zack. Thanks. I guess I was thinking too big. 

Women and cats will do as they please, and men and dogs should just relax and get use to the idea. 

-Robert Heinlein

> On Aug 2, 2016, at 00:10, Zack Widup <w9sz.zack at gmail.com> wrote:
> 
> What most hams use - maybe 5 mW lasers over 10-20 miles. VUCC would require
> at most ~60 miles a couple times if the locations are worked out right.
> 
> 73, Zack W9SZ
> 
> 
> On Mon, Aug 1, 2016 at 9:55 PM, Raymond Cote <bluegrassdakine at hotmail.com>
> wrote:
> 
>> What kind of distance and at what power?
>> Are you talking of bouncing a las off the moon reflector?
>> 
>> Women and cats will do as they please, and men and dogs should just relax
>> and get use to the idea.
>> 
>> -Robert Heinlein
>> 
>>> On Aug 1, 2016, at 16:20, Steve J. Noll <sjnoll at ix.netcom.com> wrote:
>>> 
>>> Silicon photodiodes match visible and near infrared lasers & LEDs well,
>> are fast, and have reasonably large active areas.
>>> Solar cell - essentially a silicon photodiode, but optimized for power
>> generation, not small signal detection, slower, probably noisier, no gain,
>> large area, good wavelength match.
>>> Phototransistors also match said wavelengths well, have some gain, but
>> are slower and have tiny active areas which are harder to get all of your
>> light into.
>>> Photoresistors are very slow responding, no gain, large areas, not bad
>> wavelength-wise, but again, very slow response time.
>>> Silicon avalanche photodiodes extremely fast, have gain, but take high
>> voltage, expensive.
>>> Photomultiplier tubes - if you're trying to set some extreme distance
>> record. Take high voltage, very large sensitive area, tremendous gain, very
>> fast, usually not great spectral match but gain makes up for it.
>>> 
>>> 73, Steve WA6EJO
>>> 
>>> 
>>>> On 8/1/2016 1:52 PM, Zack Widup wrote:
>>>> I've been wanting to play around with laser comms for quite a long
>> time. I
>>>> have various solid-state lasers and I have some lenses. I think I saw
>> some
>>>> recommendations on what to use for detectors once but I can't find that
>>>> info now. What are best used for detectors?
>>>> 
>>>> 73, Zack W9SZ
>>>> 
>>> 
>>> ______________________________________________________________
>>> Laser mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/laser
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Laser at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> ______________________________________________________________
>> Laser mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/laser
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Laser at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> 
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From eric.grejda at virtadpt.net  Tue Aug  2 11:57:57 2016
From: eric.grejda at virtadpt.net (Eric Grejda)
Date: Tue, 2 Aug 2016 08:57:57 -0700
Subject: [Laser] test
In-Reply-To: <CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>
References: <20160731204325.E08FDCE435F@mailman.qth.net>
	<1F9A9ED7-7115-438F-B998-FB76AF489C1C@gbis.com>
	<20160731211309.4BB03149B3C8@mailman.qth.net>
	<f444d54e-c817-9beb-0693-9414bfc3749b@ix.netcom.com>
	<47818307.8985326.1470008711986.JavaMail.yahoo@mail.yahoo.com>
	<67e8c06e-cdd8-ca85-2c61-e72a0fadf481@ix.netcom.com>
	<931331887.7381319.1470026256925.JavaMail.yahoo@mail.yahoo.com>
	<CANJxhWhwA94PLthCX2CWeM+=NmANDhiKF28hFeaHrOSCRo2cQQ@mail.gmail.com>
Message-ID: <20160802085757.a931d46a2082294b48047312@virtadpt.net>

On Mon, 1 Aug 2016 15:52:50 -0500
Zack Widup <w9sz.zack at gmail.com> wrote:

> I've been wanting to play around with laser comms for quite a long time. I
> have various solid-state lasers and I have some lenses. I think I saw some
> recommendations on what to use for detectors once but I can't find that
> info now. What are best used for detectors?

That's a good question.  When I was part of a working group experimenting
with them a couple of years back we were using laser diodes sourced from Ali
Baba and some fairly high-quality photodetectors.  We got voice mostly
working but no data mode we tried over laser worked.  Granted, our
experimental environment was a distance of about ten feet across one of the
workshops at a hackerspace...

-- 
Eric Grejda (KB3YFS)
PGP: 0x3651F89F / D04B D4D0 E5E2 5746 7CB7  05CA 1C92 4610 3651 F89F


From wchast at gmail.com  Tue Aug  2 22:34:44 2016
From: wchast at gmail.com (Chuck Hast)
Date: Tue, 2 Aug 2016 19:34:44 -0700
Subject: [Laser] Anyone in Connecticut Interested in optical Comms??
In-Reply-To: <002801d1ecc4$1240b230$36c21690$@snet.net>
References: <002801d1ecc4$1240b230$36c21690$@snet.net>
Message-ID: <CADNfBV98ZAGpuqW1WUqxxq-bLnUXjsVRkhTTrXaZpv36SM357A@mail.gmail.com>

I live in Kelso WA, and would like to try some FSO comms.  Nearest large
metro area to me is Portland, OR.

On Tue, Aug 2, 2016 at 6:45 AM, Paul Cianciolo <paulc at snet.net> wrote:

> Hello Everyone,
>
> I am just checking to see if anyone in Connecticut has joined the group and
> is interested.
> I am located in Harwinton CT and looking for others in the area interested.
>
>
> Paul Cianciolo
> W1VLF
>
> WWW.Rescueelectronics.com
>
>
>
>
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>



-- 

Chuck Hast  -- KP4DJT --
Glass, five thousand years of history and getting better.
The only container material that the USDA gives blanket approval on.

From mike at milisake.com  Fri Aug 12 15:06:23 2016
From: mike at milisake.com (Mike Long)
Date: Fri, 12 Aug 2016 15:06:23 -0400
Subject: [Laser] OPT101 and audio amplifier
Message-ID: <CAL9uovsA45HasZkH5TZaj7gvHyG9LAWOFfoyy+U3kFNeKUH0aw@mail.gmail.com>

I'll have a table at a local amateur radio event coming up on 8/20 here in
Michigan where I plan to demo free space optical comms.  I've already got a
K3PGP receiver built plus one of the power supplies/modulators built.  I'd
like to also put together some simpler setups as well (i.e. laser/LED
pointed through a fan).

I have some OPT101 chips laying around and was thinking of using one of
them in the demo.  So my question is, is it possible to just use the output
of the OPT101 to drive an audio amp to create a simple receiver?

Thanks,
Mike
W6RP

From sjnoll at ix.netcom.com  Fri Aug 12 15:44:35 2016
From: sjnoll at ix.netcom.com (Steve J. Noll)
Date: Fri, 12 Aug 2016 12:44:35 -0700
Subject: [Laser] OPT101 and audio amplifier
In-Reply-To: <CAL9uovsA45HasZkH5TZaj7gvHyG9LAWOFfoyy+U3kFNeKUH0aw@mail.gmail.com>
References: <CAL9uovsA45HasZkH5TZaj7gvHyG9LAWOFfoyy+U3kFNeKUH0aw@mail.gmail.com>
Message-ID: <8f3dff0e-58d2-3a23-6bb8-82bb3fed4daa@ix.netcom.com>

Should work fine. I would want a blocking cap between the OPT101 and the 
audio amp as the OPT101 will have a large DC output from ambient light.
Going further you could insert a filter to reduce the 60 Hz and 120 Hz 
interference.

73, Steve WA6EJO


On 8/12/2016 12:06 PM, Mike Long wrote:
> I'll have a table at a local amateur radio event coming up on 8/20 here in
> Michigan where I plan to demo free space optical comms.  I've already got a
> K3PGP receiver built plus one of the power supplies/modulators built.  I'd
> like to also put together some simpler setups as well (i.e. laser/LED
> pointed through a fan).
>
> I have some OPT101 chips laying around and was thinking of using one of
> them in the demo.  So my question is, is it possible to just use the output
> of the OPT101 to drive an audio amp to create a simple receiver?
>
> Thanks,
> Mike
> W6RP
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>


From mike at milisake.com  Fri Aug 12 16:55:47 2016
From: mike at milisake.com (Mike Long)
Date: Fri, 12 Aug 2016 16:55:47 -0400
Subject: [Laser] OPT101 and audio amplifier
In-Reply-To: <8f3dff0e-58d2-3a23-6bb8-82bb3fed4daa@ix.netcom.com>
References: <CAL9uovsA45HasZkH5TZaj7gvHyG9LAWOFfoyy+U3kFNeKUH0aw@mail.gmail.com>
	<8f3dff0e-58d2-3a23-6bb8-82bb3fed4daa@ix.netcom.com>
Message-ID: <CAL9uovumeGK-PNRcM-C8uRSWfYzo9jB_+m440d__KdGh_xHEqw@mail.gmail.com>

Thanks for the confirmation Steve.  I agree, if I were using it outside of
the demonstration then there is much more that should be done to optimize
it. Just doing this should hopefully peak a few people's interest in the
area.

73,
Mike
W6RP

On Fri, Aug 12, 2016 at 3:44 PM, Steve J. Noll <sjnoll at ix.netcom.com> wrote:

> Should work fine. I would want a blocking cap between the OPT101 and the
> audio amp as the OPT101 will have a large DC output from ambient light.
> Going further you could insert a filter to reduce the 60 Hz and 120 Hz
> interference.
>
> 73, Steve WA6EJO
>
>
>
> On 8/12/2016 12:06 PM, Mike Long wrote:
>
>> I'll have a table at a local amateur radio event coming up on 8/20 here in
>> Michigan where I plan to demo free space optical comms.  I've already got
>> a
>> K3PGP receiver built plus one of the power supplies/modulators built.  I'd
>> like to also put together some simpler setups as well (i.e. laser/LED
>> pointed through a fan).
>>
>> I have some OPT101 chips laying around and was thinking of using one of
>> them in the demo.  So my question is, is it possible to just use the
>> output
>> of the OPT101 to drive an audio amp to create a simple receiver?
>>
>> Thanks,
>> Mike
>> W6RP
>>
>>

From xe2at at hotmail.com  Fri Aug 12 17:03:32 2016
From: xe2at at hotmail.com (Alvaro de Leon Romo)
Date: Fri, 12 Aug 2016 21:03:32 +0000
Subject: [Laser] OPT101 and audio amplifier
In-Reply-To: <CAL9uovumeGK-PNRcM-C8uRSWfYzo9jB_+m440d__KdGh_xHEqw@mail.gmail.com>
References: <CAL9uovsA45HasZkH5TZaj7gvHyG9LAWOFfoyy+U3kFNeKUH0aw@mail.gmail.com>
	<8f3dff0e-58d2-3a23-6bb8-82bb3fed4daa@ix.netcom.com>,
	<CAL9uovumeGK-PNRcM-C8uRSWfYzo9jB_+m440d__KdGh_xHEqw@mail.gmail.com>
Message-ID: <DM5PR12MB1260CE91CB6B301E8B0831BDF51F0@DM5PR12MB1260.namprd12.prod.outlook.com>

Whats produce the 120hz interference ??
XE2AT

Enviado desde mi HTC de Telcel

----- Mensaje de respuesta -----
De: "Mike Long" <mike at milisake.com>
Para: "Free Space LASER Communications" <laser at mailman.qth.net>
Asunto: [Laser] OPT101 and audio amplifier
Fecha: vie., ago. 12, 2016 15:56

Thanks for the confirmation Steve.  I agree, if I were using it outside of
the demonstration then there is much more that should be done to optimize
it. Just doing this should hopefully peak a few people's interest in the
area.

73,
Mike
W6RP

On Fri, Aug 12, 2016 at 3:44 PM, Steve J. Noll <sjnoll at ix.netcom.com> wrote:

> Should work fine. I would want a blocking cap between the OPT101 and the
> audio amp as the OPT101 will have a large DC output from ambient light.
> Going further you could insert a filter to reduce the 60 Hz and 120 Hz
> interference.
>
> 73, Steve WA6EJO
>
>
>
> On 8/12/2016 12:06 PM, Mike Long wrote:
>
>> I'll have a table at a local amateur radio event coming up on 8/20 here in
>> Michigan where I plan to demo free space optical comms.  I've already got
>> a
>> K3PGP receiver built plus one of the power supplies/modulators built.  I'd
>> like to also put together some simpler setups as well (i.e. laser/LED
>> pointed through a fan).
>>
>> I have some OPT101 chips laying around and was thinking of using one of
>> them in the demo.  So my question is, is it possible to just use the
>> output
>> of the OPT101 to drive an audio amp to create a simple receiver?
>>
>> Thanks,
>> Mike
>> W6RP
>>
>>
______________________________________________________________
Laser mailing list
Home: http://mailman.qth.net/mailman/listinfo/laser
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Laser at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

From w9sz.zack at gmail.com  Fri Aug 12 17:11:45 2016
From: w9sz.zack at gmail.com (Zack Widup)
Date: Fri, 12 Aug 2016 16:11:45 -0500
Subject: [Laser] OPT101 and audio amplifier
In-Reply-To: <DM5PR12MB1260CE91CB6B301E8B0831BDF51F0@DM5PR12MB1260.namprd12.prod.outlook.com>
References: <CAL9uovsA45HasZkH5TZaj7gvHyG9LAWOFfoyy+U3kFNeKUH0aw@mail.gmail.com>
	<8f3dff0e-58d2-3a23-6bb8-82bb3fed4daa@ix.netcom.com>
	<CAL9uovumeGK-PNRcM-C8uRSWfYzo9jB_+m440d__KdGh_xHEqw@mail.gmail.com>
	<DM5PR12MB1260CE91CB6B301E8B0831BDF51F0@DM5PR12MB1260.namprd12.prod.outlook.com>
Message-ID: <CANJxhWimC1G8A3nuQS7BaM-5FCDPo1egxxUfgMauxK-6muJ3Ag@mail.gmail.com>

Flicker from fluorescent lights is twice the AC frequency of 60 Hz.

73, Zack W9SZ


On Fri, Aug 12, 2016 at 4:03 PM, Alvaro de Leon Romo <xe2at at hotmail.com>
wrote:

> Whats produce the 120hz interference ??
> XE2AT
>
> Enviado desde mi HTC de Telcel
>
> ----- Mensaje de respuesta -----
> De: "Mike Long" <mike at milisake.com>
> Para: "Free Space LASER Communications" <laser at mailman.qth.net>
> Asunto: [Laser] OPT101 and audio amplifier
> Fecha: vie., ago. 12, 2016 15:56
>
> Thanks for the confirmation Steve.  I agree, if I were using it outside of
> the demonstration then there is much more that should be done to optimize
> it. Just doing this should hopefully peak a few people's interest in the
> area.
>
> 73,
> Mike
> W6RP
>
> On Fri, Aug 12, 2016 at 3:44 PM, Steve J. Noll <sjnoll at ix.netcom.com>
> wrote:
>
> > Should work fine. I would want a blocking cap between the OPT101 and the
> > audio amp as the OPT101 will have a large DC output from ambient light.
> > Going further you could insert a filter to reduce the 60 Hz and 120 Hz
> > interference.
> >
> > 73, Steve WA6EJO
> >
> >
> >
> > On 8/12/2016 12:06 PM, Mike Long wrote:
> >
> >> I'll have a table at a local amateur radio event coming up on 8/20 here
> in
> >> Michigan where I plan to demo free space optical comms.  I've already
> got
> >> a
> >> K3PGP receiver built plus one of the power supplies/modulators built.
> I'd
> >> like to also put together some simpler setups as well (i.e. laser/LED
> >> pointed through a fan).
> >>
> >> I have some OPT101 chips laying around and was thinking of using one of
> >> them in the demo.  So my question is, is it possible to just use the
> >> output
> >> of the OPT101 to drive an audio amp to create a simple receiver?
> >>
> >> Thanks,
> >> Mike
> >> W6RP
> >>
> >>
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

From xe2at at hotmail.com  Fri Aug 12 17:19:57 2016
From: xe2at at hotmail.com (Alvaro de Leon Romo)
Date: Fri, 12 Aug 2016 21:19:57 +0000
Subject: [Laser] OPT101 and audio amplifier
In-Reply-To: <CANJxhWimC1G8A3nuQS7BaM-5FCDPo1egxxUfgMauxK-6muJ3Ag@mail.gmail.com>
References: <CAL9uovsA45HasZkH5TZaj7gvHyG9LAWOFfoyy+U3kFNeKUH0aw@mail.gmail.com>
	<8f3dff0e-58d2-3a23-6bb8-82bb3fed4daa@ix.netcom.com>
	<CAL9uovumeGK-PNRcM-C8uRSWfYzo9jB_+m440d__KdGh_xHEqw@mail.gmail.com>
	<DM5PR12MB1260CE91CB6B301E8B0831BDF51F0@DM5PR12MB1260.namprd12.prod.outlook.com>,
	<CANJxhWimC1G8A3nuQS7BaM-5FCDPo1egxxUfgMauxK-6muJ3Ag@mail.gmail.com>
Message-ID: <DM5PR12MB1260BBE70ED7EDD6A381D851F51F0@DM5PR12MB1260.namprd12.prod.outlook.com>

Tnx


Enviado desde mi HTC de Telcel

----- Mensaje de respuesta -----
De: "Zack Widup" <w9sz.zack at gmail.com>
Para: "Free Space LASER Communications" <laser at mailman.qth.net>
Asunto: [Laser] OPT101 and audio amplifier
Fecha: vie., ago. 12, 2016 16:11

Flicker from fluorescent lights is twice the AC frequency of 60 Hz.

73, Zack W9SZ


On Fri, Aug 12, 2016 at 4:03 PM, Alvaro de Leon Romo <xe2at at hotmail.com>
wrote:

> Whats produce the 120hz interference ??
> XE2AT
>
> Enviado desde mi HTC de Telcel
>
> ----- Mensaje de respuesta -----
> De: "Mike Long" <mike at milisake.com>
> Para: "Free Space LASER Communications" <laser at mailman.qth.net>
> Asunto: [Laser] OPT101 and audio amplifier
> Fecha: vie., ago. 12, 2016 15:56
>
> Thanks for the confirmation Steve.  I agree, if I were using it outside of
> the demonstration then there is much more that should be done to optimize
> it. Just doing this should hopefully peak a few people's interest in the
> area.
>
> 73,
> Mike
> W6RP
>
> On Fri, Aug 12, 2016 at 3:44 PM, Steve J. Noll <sjnoll at ix.netcom.com>
> wrote:
>
> > Should work fine. I would want a blocking cap between the OPT101 and the
> > audio amp as the OPT101 will have a large DC output from ambient light.
> > Going further you could insert a filter to reduce the 60 Hz and 120 Hz
> > interference.
> >
> > 73, Steve WA6EJO
> >
> >
> >
> > On 8/12/2016 12:06 PM, Mike Long wrote:
> >
> >> I'll have a table at a local amateur radio event coming up on 8/20 here
> in
> >> Michigan where I plan to demo free space optical comms.  I've already
> got
> >> a
> >> K3PGP receiver built plus one of the power supplies/modulators built.
> I'd
> >> like to also put together some simpler setups as well (i.e. laser/LED
> >> pointed through a fan).
> >>
> >> I have some OPT101 chips laying around and was thinking of using one of
> >> them in the demo.  So my question is, is it possible to just use the
> >> output
> >> of the OPT101 to drive an audio amp to create a simple receiver?
> >>
> >> Thanks,
> >> Mike
> >> W6RP
> >>
> >>
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From sjnoll at ix.netcom.com  Fri Aug 12 17:24:10 2016
From: sjnoll at ix.netcom.com (Steve J. Noll)
Date: Fri, 12 Aug 2016 14:24:10 -0700
Subject: [Laser] OPT101 and audio amplifier
In-Reply-To: <CANJxhWimC1G8A3nuQS7BaM-5FCDPo1egxxUfgMauxK-6muJ3Ag@mail.gmail.com>
References: <CAL9uovsA45HasZkH5TZaj7gvHyG9LAWOFfoyy+U3kFNeKUH0aw@mail.gmail.com>
	<8f3dff0e-58d2-3a23-6bb8-82bb3fed4daa@ix.netcom.com>
	<CAL9uovumeGK-PNRcM-C8uRSWfYzo9jB_+m440d__KdGh_xHEqw@mail.gmail.com>
	<DM5PR12MB1260CE91CB6B301E8B0831BDF51F0@DM5PR12MB1260.namprd12.prod.outlook.com>
	<CANJxhWimC1G8A3nuQS7BaM-5FCDPo1egxxUfgMauxK-6muJ3Ag@mail.gmail.com>
Message-ID: <356700ed-26ee-3f67-ef24-606bee9dfe76@ix.netcom.com>


Roger that.  FWIW when at work at Advanced Photonix doing photodiode 
measurements with a lock-in amp we modulated the light signal at 17 Hz.
That avoided 60 Hz and any harmonic or sub-harmonic of it. Result is 
ability to make accurate measurements of infinitesimally tiny signals.

73, Steve WA6EJO


On 8/12/2016 2:11 PM, Zack Widup wrote:
> Flicker from fluorescent lights is twice the AC frequency of 60 Hz.
>
> 73, Zack W9SZ
>
>
> On Fri, Aug 12, 2016 at 4:03 PM, Alvaro de Leon Romo <xe2at at hotmail.com>
> wrote:
>
>> Whats produce the 120hz interference ??
>> XE2AT
>>
>> Enviado desde mi HTC de Telcel
>>
>> ----- Mensaje de respuesta -----
>> De: "Mike Long" <mike at milisake.com>
>> Para: "Free Space LASER Communications" <laser at mailman.qth.net>
>> Asunto: [Laser] OPT101 and audio amplifier
>> Fecha: vie., ago. 12, 2016 15:56
>>
>> Thanks for the confirmation Steve.  I agree, if I were using it outside of
>> the demonstration then there is much more that should be done to optimize
>> it. Just doing this should hopefully peak a few people's interest in the
>> area.
>>
>> 73,
>> Mike
>> W6RP
>>
>> On Fri, Aug 12, 2016 at 3:44 PM, Steve J. Noll <sjnoll at ix.netcom.com>
>> wrote:
>>
>>> Should work fine. I would want a blocking cap between the OPT101 and the
>>> audio amp as the OPT101 will have a large DC output from ambient light.
>>> Going further you could insert a filter to reduce the 60 Hz and 120 Hz
>>> interference.
>>>
>>> 73, Steve WA6EJO
>>>