I placed the OSA (Optical Spectrum Analyzer) on the AP table and this OSA will monitor the REFL beam.
Tomorrow I will do fine alignment of the OSA.
- a new 90% BS in the REFL path for limiting the REFL beam power
- Squeezed the ABSL (ABSolute length Laser) path
- Modification of the AS OSA path
I am installing an OSA on the AP table and it's ongoing.