Laser Diodes from Photocopy Machines

I found these diodes from photocopy machines.
Anyone knows how to connect it through the board? Or is better to desoldering the diode and connect it straight to a simple drive circuit?
I am not really sure about the voltage,specfications or what kind of diode is.Any guess?

Thanks.


ps.I have more tha 15 of these and still collecting more.If they are good i will keep 3-4 and the others i can give it away to anyone who like one.

Why do you want low power IR lasers? Which is what these are.

Ok thanks.
I didnt know that these are IR diodes.I tought maybe are nice for a laser pen.
Do you know what voltage is commonly used for IR diodes and which pins to connect the negative and positive to check if they are working?

It really depends on the diode. Though you should be able to look at the board they're mounted on to figure out which pins are which. There's only three after all. The one attached to the ground plane will be.. well.. the ground.

If really are infrared laser diodes, the most typical voltage is 1.8 to 2.0 volts, but may vary somewhat depending on model.

And the most typical connection of these diodes is as shown in the accompanying drawing.