[Laser] Avalance photodiodes

[Joe Fitzgerald]

There is an app note from Advanced Photonix at 

http://members.verizon.net/km1p/Small_Area.pdf

which should get you started.

-Joe KM1P

G0MRF@aol.com wrote:
> Hi all.
> 
> Someone who spotted the laser content of my website has been kind enough to 
> mail 3 Avalance photodiodes to me.  They are probably older obsolete types, 
> (one is listed as the Centronic APD 05 4R) but could be quite useful.
> 
> I've not seen any application circuits for this type of diode but I 
> understand that they require a bias voltage of between 100 and 400 Volts. The Centronic 
> part has a sheet enclosed saying 385 volts. It also has a response figure at 
> 23Amps per Watt so it should be lot better than my OPT210 at 4A/W
> 
> Has anyone seen an application note for an avalance diode?  e.g. How do I 
> apply bias and then extract a signal while maintaing low noise. Or for the two 
> unspecified types does anyone know how I can find the optimum bias voltage 
> without destroying the device?
> 
> Regards
> 
> David  G0MRF
> 
> 
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