[Laser] test

[Raymond Cote]

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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