nutsinee.kijbunchoo@LIGO.ORG - posted 11:06, Tuesday 18 December 2018 - last comment - 17:31, Tuesday 18 December 2018(46040)
Pump laser drifting in and out of multimode
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Fixed for now. The current was 2.116A, temperature was 29.71C. I cranked up the current to 2.136A, I tried to turn the temperature down to compensate but the knob was very sensitive so I left it at 29.69C. The frequency was -31MHz off the 158MHz beat note, now it's +18MHz. The sign hasn't changed.