Here I attach the measurement of SHG and GRMC transmission noise spectrum. 

The difference is I measured the noise spectrum of SHG transmission at a wrong place. (Actually, I was measuring the locking noise of SHG in the entry 1501)

However, we really have a worse GRMC transmission noise. Especially, there are peaks from the 4-10kHz region. They are responsible for the region where we have more noise in the squeezing measurement.

I will try to understand why there is a factor between the old and new measurement.