LIGO Document T1700104-v2

aLIGO, SQZ, VOPO Cavity, Final Optical Design

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T - Technical notes
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We present the design of the in-vacuum optical parametrical oscillator (VOPO) to be used in aLIGO squeezing experiments.
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Notes and Changes:
Important note, the M1 mirror is being replaced with higher a reflectance mirror (T=13% @ 1064nm, T~2.5% @532nm).

The first mirror is being assembled at MIT in January 2017, to be used at LHO.

Our design document (V2) doesn't reflect yet this change (will be done in V3, once the change is definitively approved)

The V3 update should also include the change in the OPO input coupler to increase the OPO finesse per ECR E1800193.

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