Optical Layout and Parameters for the Advanced LIGO Cavities

Document #:

LIGO-T0900043-v7

Document type:

T - Technical notes

Abstract:

This document describes the optical parameters of the various cavities for Advanced LIGO. The lengths between various optical elements, ROC values of the mirrors, and their tolerances are listed. The various cavity parameters like Finesse, linewidths, and transversal mode spacing are calculated. Included also are the higher order modes offsets from resonances. The recycling cavity parameters are picked assuming that the TCS keeps the IFO same for both the cold as well as full power operation. The RC can be matched to a low power IFO state by appropriately changing the recycling cavity mirrors positions.

Files in Document:

• LIGO-T0900043-07.pdf (172.0 kB)

Topics:

• Input Optics
• Core Optics
• System Engineering
• Sensing and Control

Authors:

• Muzammil Arain

Notes and Changes:

Mainly a few parameters in the folded design have changed. Nothing major. The values here are now consistent with the bid package sent from UF.

Publication Information:

http://ilog.ligo-wa.caltech.edu:7285/advligo/COC_Final_Design_Review