Laser Stabilisation for the Measurement of Thermal Noise
Baigent, K. G.; Shaddock, Daniel; Gray, Malcolm; McClelland, David
In order to measure the thermal noise of a mirror suspended in a vacuum it is necessary for the length measurement error due to intensity and frequency noise of the probe laser to be reduced below the thermal noise level. Here we report on an experiment to reduce the frequency and intensity noise of a 40mW Nd:YAG laser for this purpose. The frequency is stabilised using the standard reflection locking technique. To stabilise the laser intensity a technique which uses the properties of an 'in...[Show more]
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