Optical design of a high power mode-cleaner for AIGO

Details Optical design of a high power mode-cleaner for AIGO Optical design of a high power mode-cleaner for AIGO

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005gregr..37.1609b&link_type=abstract

General Relativity and Gravitation, Volume 37, Issue 9, pp.1609-1619

Physics

Optics

2

Mode-Cleaner, Thermal Lensing

Scientific paper

Laser beam geometry variations such as beam jitter and frequency fluctuations are a critical source of noise in the output signal of a laser interferometer gravitational wave detector. In order to minimise this noise a resonant vibration isolated optical filter or mode-cleaner is required. For advanced gravitational wave detectors such a mode-cleaner is required to be able to handle transmitted power ˜100 W, and an internal circulating power of 45 kW. This paper addresses the design requirements of such a mode-cleaner. We characterise the mode-cleaner requirements and the effects of high laser power on the optics and its consequence on the suppression of higher order modes.

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