Path length modulation technique for scatter noise immunity in squeezing measurements

作者：Wade Andrew R^*; Chua Sheon S Y; Stefszky Michael S; Shaddock Daniel A; McClelland David E

来源：Optics Letters, 2013, 38(13): 2265-2267.

DOI：10.1364/OL.38.002265

We present a technique for frequency shifting scattering induced noise on squeezed light beams, providing immunity from scattered light while preserving the squeezed states. Using a 500 Hz pre and postsqueezing apparatus path length modulation, we show up to a 20 dB reduction in scattering induced noise while recovering squeezing measurement below the shot noise level. Such a technique offers immunity to spurious scattering sources without the need for optically lossy isolation optics.

• 出版日期2013-7-1