[Laser] Observing the longitudinal mode beating in HeNe lasers

[Karel Kulhavý]

On Mon, Jul 12, 2004 at 01:09:02PM -0700, Kerry Banke wrote:
> I recently have been putting together an experimental wide-band optical 
> communicator using modified laser pointers and surplus pin photodiodes.  We 
> purchased  a good number of very  cheap pin photodiodes locally and found 
> that by reverse biasing them to about 50 VDC they will respond beyond 1 
> GHz  & plan to make them available to laser  experimenters . I'm in the 

What type are these diodes?

Cl<