Aso, Hirata, Nishino

@Locked state

Before SRM: 52(3) mW*

After SRM; 52(3) mW*

After OMMT1; 52(3) mW*

After OMMT2 (= before OFI): 49(2) mW

After OFI: 46(2) mW -> OFI transimissivity = 94(6) %

After OSTM (rellection): 45(1) mW -> OSTM reflectivity = 98(5) %

OSTM (transmission): 0.42(1) mW -> OSTM transmissivity = 0.91(5) %

Total transimissivity from before-OFI to after-OSTM: 92(4) %

@Unlocked state

After OMMT2 (= before OFI): 62(1) mW

After OFI: 58(1) mW -> OFI transimissivity = 94(2) %

After OSTM (rellection): 57(1) mW -> OSTM reflectivity = 98(2) %

OSTM (transmission): 0.52(1) mW -> OSTM transmissivity = 0.91(3) %

Total transimissivity from before-SRM to after-OSTM: 92(5) %

MEMO

*We used two power meters, Ophir Photonics and Thorlabs, and did intercalibration.

Ophir's one has a bigger aperture so is capable of the beam size before around OMMT1 (but power resolusion is worse than Thorlabs).

* indicates the one measured by Ophir Photonics.