Andrew, Yes, we see the same thing... The laser shows up in visible and then we change to MLUV. We have found as much as 100mW at low power and 3 watts at high power variance. The photocells are calibrated based on the wavelength that you recieved the laser in. If you want to run 647nm then you must put a external meter and recalibrate the photocells. This applies to the Innova 70-90-300 systems. On the Spectra Physics beamlock, it is done via a 3 digit switch which changes the gain of the photocell. In checking the 30+ Coherent Innova 90-6 lasers that we have on sperm sorters in the world, I believe none of them were putting out the correct power output when they were running in MLUV. All required photocell calibration... Set the system power to 5 amps less than full current and then do the photocell calibration. This allows the laser to be linearly responsive across the min to full current range. If anyone needs any information about Photocell calibration, I would be happy to offer my assistance. I am sure Andrew would also... regards, Mike Evans
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