Nutsinee Daniel

We added an 1811 photodetector to monitor the RF intensity noise of the squeezer laser. The new photodetector is mounted next to the 1611 which is used for the laser locking. There was a 50:50 beam splitter in the path of the laser to the 1611 that dumped about 3.6mW of light onto a beam dump. We added a 03 ND filter and a 150mm lens to this path and ended up with about 400uA of DC current on the 1811. The RF and DC readouts use cables ISC_SQ_540_1 and ISC_SQ_541_1, respectively. They are routed thru the PEM panel that had 2 TNC feedthru adapters available. The RF is then routed by cable ISC_SQ_540_2 to the same RF patch panel used for homodyne and OMC RF at position 3. We diconnected the RF of the homodyne from the demodulator and hooked up the new 1811 RF channel. The DC is routed by cable ISC_SQ_540_2 to the D-sub breakout panel just beneath it on position 4. The corresponding filter module is H1:SQZ-EXTRA_AI_4_OUT.