[Aritomi, Yuhang, Yuefan, Eleonora, Matteo, Takahashi]

We opened PR chamber and measured BAB power in PR chamber. BAB power was fluctuating a bit and BAB power after dichoic mirror seems not reasonable, but anyway loss of dichroic mirror should be small. Loss of faraday in PR chamber is around 5% and other loss is less than 1%.

Then we put mirror after dichroic mirror and reflected BAB into faraday and maximized the reflection. BAB injection inside PR chamber is 131uW and BAB reflection is 116uW. The round trip loss is 11.5%.