Experimental characterization of frequency-dependent squeezed light
作者： Simon Chelkowski , Henning Vahlbruch , Boris Hage , Alexander Franzen , Nico Lastzka
DOI: 10.1103/PHYSREVA.71.013806
关键词: Quantum tomography 、 Local oscillator 、 Gravitational wave 、 Ellipse 、 Optics 、 Astronomical interferometer 、 Noise power 、 Squeezed coherent state 、 Physics 、 Detector
摘要: We report on the demonstration of broadband squeezed laser beams that show a frequency-dependent orientation squeezing ellipse. Carrier frequency as well quadrature angle were stably locked to reference beam at 1064 nm. This was characterized in terms noise power spectra and contour plots Wigner functions. The latter measured by quantum state tomography. Our tomograph allowed stable lock local oscillator for arbitrary angles with ±1° precision. Frequency-dependent orientations ellipse are necessary states light provide sensitivity improvement third-generation gravitational-wave interferometers. consider application our system long-baseline interferometers such future squeezed-light upgraded GEO 600 detector.
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