Experimental characterization of frequency-dependent squeezed light

被引：79

作者：

Chelkowski, S

Vahlbruch, H

Hage, B

Franzen, A

Lastzka, N

Danzmann, K

Schnabel, R

机构：

[1] Leibniz Univ Hannover, Inst Atom & Mol Phys, D-30167 Hannover, Germany

[2] Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-30167 Hannover, Germany

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.71.013806

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the demonstration of broadband squeezed laser beams that show a frequency-dependent orientation of the squeezing ellipse. Carrier frequency as well as quadrature angle were stably locked to a reference laser beam at 1064 nm. This frequency-dependent squeezing was characterized in terms of noise power spectra and contour plots of Wigner functions. The latter were measured by quantum state tomography. Our tomograph allowed a stable lock to a local oscillator beam for arbitrary quadrature angles with +/-1degrees precision. Frequency-dependent orientations of the squeezing ellipse are necessary for squeezed states of light to provide a broadband sensitivity improvement in third-generation gravitational-wave interferometers. We consider the application of our system to long-baseline interferometers such as a future squeezed-light upgraded GEO 600 detector.

引用

页数：8

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