This morining, we checked the stablility of IMC last night. Fig.1 shows the hours trend of {IMC, PMC, FIB} TRANS/OUTPUT powers, IMC, PMC error signals. My work last night was finshed until 21:00 JST, 10/15, 2025. Then, MCs are keeping to lock to 9:00 JST, 10/16. So the current lock duration is 12 hours. It is stable enough to lock PRFPMI.

Additionally, Fig.2 shows the days trend. more than 2 days before we used NeoLASE, There seems to be no glitch in the IMC error signal after switching the laser to fiber amp. like the glitch at the right cursor when we used NeoLASE. (One reason why the RMS itself was changed is that IMC CMS common gain was also changed. We need to compensate it to compare them.)

On the other hand, accoriding to the PMC trans. power in fig.1, the power seems to sometimes become noisy. Fig 3 shows the trend zoomed up around -2h. The power decreased somehow. However, FIB output power was not changed at that time. One of possibillities is that current laser temperature is close to mode-hop region.