YuhangZhao - 22:43, Thursday 11 April 2019 (1290)
Comment to The comparision between old and new servo on homodyne noise spectrum with only LO (Click here to view original report: 1286)
After connecting the power of homodyne and spectrum analyzer(this can remove the ground loop noise), I measured noise spectrum of homodyne again. During this measurement, there is only an infrared beam incident and has a power value of 1.3mW.
The result is shown in the attached figure.
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