[Laser] medium power IR diode

[David Rea, K2THZ]

There are lots of commercial collimation options available; at moderate
power levels, cooling isn't a huge concern, so you can get a simple tube
and optics set and be all set.

Standard laser diode configurable optics and tubes all have M9x0.5mm
threads. Roithner sells the LENS-XX series of collimation optics, and a
variety of plastic optics as well. There are plenty of places that sell
similar optics here in the states, primary among them being Thorlabs.
Thor also sells laser diodes and drivers, but they're fairly expensive.

73
Dave K2THZ

On Wed, 2003-07-23 at 12:45, Andrew T. Flowers, K0SM wrote:
> Hi folks
> I was looking around at laser diodes the other day and I came across a 
> 120mw IR (784nm) diode made by Sharp:
> http://rocky.digikey.com/WebLib/Sharp/Web%20Data/GH078JA2C.pdf
> 
> I was thinking of getting one or two and building a constant current 
> source to drive it about halfway between Ith and Iop.   This should keep 
> it from blowing up when I take it to a mountain in January.  Anyone know 
> how I might go about collimating this thing?   Would I need to find some 
> way of cooling it?   Digikey is selling them for $20, which seems to be 
> a good value in terms of $/mw.  If I can get it going it would probably 
> be ideal for cloudbounce/troposcatter experiments with Silicon-based PIN 
> photodiode.
> Ideas??
> 
> Andy
> K0SM
> 
> 
> 
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