[Laser] Diode Pinouts?

[KD7JYK]

Excellent information.  Thank You.  I found the following most usefull:

All that is needed is a voltmeter (rather a millivoltmeter) and an operating
incandescent lamp (tungsten filament like a pocket flashlight). If you
direct a light beam to the device under test and measure the voltage between
common and each of the other two pins you will find two of the four
following possibilities:


About +500 mV. This is a PD anode.
About -500 mV. This is a PD cathode.
About +5 mV. This is a LD anode.
About -5 mV. This is a LD cathode.
The large difference is due to the fact that the photodiode is a much more
efficient converter of light to electricity although both the PD and LD work
as photo cells. The above figures depend on the intensity of the light but
there will be no mistake: The PD voltage will always be much larger that the
LD voltage.