[Laser] APD diodes in Geiger mode

[Charles Pooley]

Does anyone have any experience with Geiger mode silicon diodes or with 
silicon APD's operated in Geiger mode?  (not all APD's will work in 
Geiger mode)
   
  And where to get them.
   
  My interest is in space link for later stages of Microlauncher 
development.
   
  Charles Pooley KD6HKU