- #1
kelly0303
- 580
- 33
Hello! I have this photodiode which I connect to an oscilloscope using a normal BNC cable to an oscilloscope, terminated with a 50 Ohm resistor. I measure the output from an optical cavity (which is basically laser light), which in my case looks like a flat signal close to zero, and regular peaks (on the order of hundreds of mV amplitude) appearing from time to time (the details are not important, but I basically get a signal when the laser frequency, which I scan, matches the optical cavity length).
I would like to convert the maximum voltage in these peaks, call it to the laser power corresponding to that (basically the laser power output when my laser frequency is perfectly on resonance with my optical cavity), call it . From the manual from that link I have the formula , where in my case, for nm I get .
Also if I assume the resistance to be Ohm (is this right?) and ignore the dark current, the measured voltage would be so in my case I would get mW. Is this right or am I oversimplifying it (I don't need a super accurate result, but just a close estimate of the power)? Thank you!
I would like to convert the maximum voltage in these peaks, call it
Also if I assume the resistance to be