Posted by GregS on March 4, 2010, 12:15 pm
I was trying to attempt to measure noise on a 6 watt laser. The main problem
is trying to focus on something without it melting or catching fire.
I was trying to look at the reflective light withg a photodiode.
I guess there migh be some fancy expensive device ??
greg
Posted by Meat Plow on March 4, 2010, 12:30 pm
On Thu, 04 Mar 2010 17:15:05 GMT, zekfrivo@zekfrivolous.com
(GregS)wrote:
>I was trying to attempt to measure noise on a 6 watt laser. The main problem
>is trying to focus on something without it melting or catching fire.
>I was trying to look at the reflective light withg a photodiode.
>I guess there migh be some fancy expensive device ??
>greg
Indium Gallium Arsenide power wavehead photodetector.
Posted by William Sommerwerck on March 4, 2010, 1:09 pm
What about using a lens to spread the light?
Posted by Meat Plow on March 4, 2010, 1:28 pm
On Thu, 4 Mar 2010 10:09:27 -0800, "William Sommerwerck"
>What about using a lens to spread the light?
Wouldn't that effect or distort the noise or influence the reading
otherwise?
Posted by William Sommerwerck on March 4, 2010, 1:34 pm
>> What about using a lens to spread the light?
> Wouldn't that affect or distort the noise or influence
> the reading otherwise?
Well, at the least it would reduce the absolute value of noise read. But if
the light were spread evenly, and you knew the area ratio of spread to
direct light...
>is trying to focus on something without it melting or catching fire.
>I was trying to look at the reflective light withg a photodiode.
>I guess there migh be some fancy expensive device ??
>greg