photodiode testing

[Dr. Arun Joglekar]

I have purchased Silicon and InGaAs photodiode and wish to use these. To begin how do I test that they are working? Can I use a multimeter to check that these are not burnt/damaged? If so where I should attach the common(black) electrode-anode or cathode? Will multimeter voltage damage the PD?

And can I use a multimeter to measure current output while pointing Si PD to bulb or Sun?

Arun Joglekar

 

[Resqueline]

There are at least two ways to bias photodiodes, each with their own advantages.
I'd not be afraid that a multimeter would be able to damage a silicon PD.
I'm not familiar with the InGaAs characteristics, but the current output test is always safe.

 

[neon]

you got it right use a multimeter on the hi scale there is usualy a 9v battery but that will not blow anything because hi res. however make sure of polarity otherwise it could damage it.

 

[eptheta]

Multimeters won't harm it much (the silicon one). I've used mine to test my photodiodes. I had trouble measuring voltage for some reason, but resistance mode is accurate enough.

 

[heri.aza]

I use silicon photodioda for my proximity sensor. I ofter measure the photodioda in "on" and "off" circuit.