[Laser] test

[Zack Widup]

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
> >>
> >
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