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Japanese Journal of Applied Physics

Pulsed Homodyne Detection of Squeezed Light at Telecommunication Wavelength

Yujiro Eto, Takashi Tajima, Yun Zhang, Takuya Hirano

Published Aug 1, 2006• 10 citations
Publisher

Abstract

We present the generation of pulsed squeezed light at telecommunication wavelength of 1.535 µm via single-pass parametric amplification in a periodically poled MgO-doped lithium niobate waveguide using a novel collinear configuration. The quadrature-amplitude of squeezed light is measured in time domain. The classical parametric deamplification of -3.2 dB and quadrature squeezing of -1.5 dB are observed. The maximum classical parametric amplification of 19.3 dB is obtained at pump average power of 0.47 mW, taking advantage of the tight confinement in a waveguide and high peak power of the pulsed light.

DOI
10.1143/jjap.45.l821

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We present the generation of pulsed squeezed light at telecommunication wavelength of 1.535 µm via single-pass parametric amplification in a periodically poled MgO-doped lithium niobate waveguide using a novel collinear configuration. The quadrature-amplitude of squeezed light is measured in time domain. The classical parametric deamplification of -3.2 dB and quadrature squeezing of -1.5 dB are observed. The maximum classical parametric amplification of 19.3 dB is obtained at pump average power of 0.47 mW, taking advantage of the tight confinement in a waveguide and high peak power of the pulsed light.
We report on the generation of quadrature squeezed light at 1.535 microm via single-pass optical parametric amplification in a periodically poled MgO:LiNbO(3) waveguide, and detection with a temporally shaped local oscillator. Squeezing of -4.1 dB was directly measured using the shaped local oscillator. Classical parametric gain of the shaped pulse was also investigated; a deamplification gain of -12.1 dB was observed with the amplification gain of only +13.8 dB. We experimentally show that the use of shaped pulse as local oscillator in homodyne detection allows us efficient squeezing detection with near-unit mode-matching efficiency.