## Calculating the average power emitted from a laser

I have found a 5000 volt 20 milliamp laser at a Ham fest now logic tells me the power of the laser would be simply 5000V*0.02A= 10watt input then loses would maybe make it one watt. however I really doubt that it has that much power. I haven't been able to find a power supply capable either of running the thing either because the ignition voltage is 10,000 volts! I would rather find out the power of the Laser before I go on a hunt for a power supply and I'm curious on how one can calculate the power of a laser without measuring the output beam intensity.
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 Blog Entries: 7 Recognitions: Gold Member Homework Help If you have a 20 milliWatt laser, isn't its power 20 milliWatts or am I missing something?
 no the rating on the side says 20 milli amps 5000 volts

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## Calculating the average power emitted from a laser

OK, so you changed your units on me. The fact that you put 10 W in does not mean that you get 10 W out. I am not an expert on this, but I would assume that he efficiency of your laser is a number you will probably have to measure, not calculate. See for example