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We show that the sensitivity-bandwidth product of the aLIGO gravitational wave detector can be enhanced by a factor of 18, while remaining below the standard quantum limit, by employing a white light cavity configuration.
We compare deviations from theory in the yield of second harmonic generation in order to characterize high-repetition rate femtosecond laser sources where the amplitude and phase differs from pulse to pulse. Experimental results are presented for cases with phase noise and a post-pulse.
The practical implementation of a phase diversity sensor for high resolution measurement of disturbed laser beams is detailed here. Numerical simulations show that, with simple material, a 60×60 map of complex amplitude with λ/100 accuracy can be obtained.
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