Well, I discovered the first problem with my method... I'm not using DZ's color correction board correctly (RTFM fail I guess). I forgot to set the gain so that 5V in gives 5V out for each offset...
I'll update the results soon...
I have been trying to figure out how to acquire the modulation signal. I managed to find one of these here:
http://sine.ni.com/nips/cds/view/p/lang/en/nid/14124
I think that would be ideal, but it is used in a rather important system, so I'm trying to find another solution. Don't want to stir up a shit storm by breaking it.
If anyone else here has a DAQ and FB3 I'd be really interested in obtaining the modulation signal.
Alternatively, I have one of these:
http://labjack.com/u12/specs
That I can use freely. I suspect that it is too slow (1200 samples/s) to capture the signal unless I can average it somehow. I have no clue about how to do that though.
I think they can only cool, at least that's how I understood it from my conversations with bridge.
The ambient temperature was 21C when I did these measurements. Personally I think that's a very comfortable temperature. Apparently chinese lasers do not.
Yes, I'm working on obtaining the modulation signal. However, if we assume that the diode is ideal with respect to modulation (My gut feeling tells me it's actually >90%, but I'm hoping drlava will give his view on this) then the measured power from the diode can be viewed as the time-averaged modulation signal.