I have a Coherent Cx-10 CO2 laser that I want to use for laser heating of very small samples at high pressure, so I need to accurately control the laser power. I also have a pulse width modulated power controller, called the PC-1G, from the same company. This controller only has a knob for adjusting the laser power but it also has a 37-pin D-connector for user interface.
Power is controlled with a voltage input to control duty cycle, described in the operator's manual as: "It is possible to vary the average output power of the laser from zero to its maximum output by delivering to the laser RF power module a fixed frequency, variable duty cycle control signal". I believe the laser is protocol independent and duty cycle is adjusted with voltage to a single pin, so how do I control this voltage? It seems that the 37-pin connector is not commonly used, so I'm also wondering what kind of hardware I can use to interface with the PC-1G controller.
I attached the pin-outs for the user interface connector and I can attach the block diagram for this controller or anything else if it would help.