I switched the cable from the 10W controller to the original controller for 100 mW laser. It is working well now, the cables are tied properly.
For now, I don't need to use the FSS servo card to scan the laser frequency.
I'm using a function generator for fast channel (PZT), and a voltage calibrator for slow channel (thermal control.)
The alignment is in progress. With the aid of a CCD camera and a macroscopic lens, looking for the beam position on the mirror is getting easier.
Currently I see some light at the back of the cavity. |