Today, I could lock the YARM laser for 2h to the YARM cavity. After to hours the output of the servo is saturated. I need to work on thermal feedback to the laser.
It is a nice TEM00 mode and the green light enters PSL table.
Measured with pin-ball machine spectrum analyzer (I forgot the real name, but it is the one that makes sounds like a pin-ball machine), source power10mVp, Lb1005 gain 2.05.
Input offset of LB1005 is zero
On Thursday, Oct 27, lock for 3 min
On Friday, Oct 28, lock up to 18 min, improvements done by
On Monday,Oct 31, careful adjustment of summing box (rear of of LB1005), lock up to 2h, limited by saturated feedback signal --> work on slow control
Some more plots