Laser Stabilisation for the Interferometric Measurement of the Thermal Noise of Suspended Test Masses

Details Laser Stabilisation for the Interferometric Measurement of the Thermal Noise of Suspended Test Masses Laser Stabilisation for the Interferometric Measurement of the Thermal Noise of Suspended Test Masses

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002nmgm.meet.1866s&link_type=abstract

"THE NINTH MARCEL GROSSMANN MEETING On Recent Developments in Theoretical and Experimental General Relativity, Gravitation and R

Physics

Scientific paper

Here we describe the method and preliminary results of the laser stabilisation scheme used in the ANU thermal noise experiment. To suppress the frequency noise level of the laser we frequency stabilise the laser to a ring cavity. In addition we intensity stabilise the laser using standard intensity feedback, and an extra loop used to suppress the intra-cavity field fluctuations. The frequency stabilised relative laser linewidth is 0.9 {Hz/}√ {Hz} and an intensity noise suppression of 30dB at low frequencies is achieved.

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