daniel.sigg@LIGO.ORG - posted 12:30, Tuesday 06 November 2018 - last comment - 15:52, Tuesday 06 November 2018(45055)
Squeezer laser gone multimode...
Great!
Pic 1: Two laser modes are visible when scanning the SHG.
Pic 2: After biasing the temperature actuator by ~3GHz, we are back to single mode operations.
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Nutsinee Daniel
Increased the diode current by ~0.1A to 2.12A and adjusted the temperature to bring the beat note back. Check within ±400MHz and found no mode hope. Also, adjusted the alignment of the beat note path. It shows -4dBm when it reads 158MHz.