R&D (FilterCavity)
ChienMingWu - 23:52, Friday 17 May 2019 (1360)
Install the new Faraday Isolator

Chien-Ming, Yu-Hang

We installed the new Faraday Isolator (FI) on the main laser beam. The optical intensity transmission efficiency we measured was >98% although the polarizer at the entrance of this FI was accidentally scratched yesterday.

The mode matching statuses before and after inserting this new FI are shown in the attached figure. It got a little worse after inserting FI.

Now the SHG can provide 218mW when input 580mW IR. We cleaned some optical component, then we can get more IR power (up to 880 mW) to the SHG if needed.

Other mode matching status are also shown.

Images attached to this report
1360_20190517165217_shg.png 1360_20190517165221_otherstatus.png
Comments related to this report
YuhangZhao - 07:46, Saturday 18 May 2019 (1362)

I also matched BAB into OPO. The spectrum is shown in the attached figure.

The matching of main laser optical fiber is also changed after the cleaning of some mirrors.

The good thing is we see the main laser is very stable after the installation of this second FI. The situation is definitely much better than the situation before.