Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Conference on Quantum Information

Pulsed homodyne detection of squeezed light at telecommunication wavelength

Yujiro Eto, Takashi Tajima, Yun Zhang, Takuya Hirano

Published Jan 1, 2007• 1 citation
Publisher

Abstract

We present the generation of squeezed light at 1.535 µm by single-pass optical parametric amplification in a periodically poled MgO-doped LiNbO3 waveguide. Squeezing of −4.2 dB was observed by using a temporally matched local oscillator.
DOI
10.1364/icqi.2007.jwc36

Related papers

Pulsed Homodyne Detection of Squeezed Light at Telecommunication Wavelength

Yujiro Eto, Takashi Tajima, Yun Zhang +1 more

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.

Japanese Journal of Applied Physics•Aug 1, 2006•10 citations

Observation of squeezed light at 1535 μm using a pulsed homodyne detector

Yujiro Eto, Takashi Tajima, Yun Zhang +1 more

Squeezed light was generated at a telecommunication wavelength via single-pass optical parametric amplification in a periodically poled MgO-doped LiNbO(3) waveguide. Classical parametric deamplification of -8.9 dB was achieved. This large magnitude of deamplification indicates that the problem of gain-induced diffraction was avoided by employing the waveguide. Squeezing of 3.2 dB was directly observed using a time-domain pulsed homodyne detector.

Optics Letters•Jun 6, 2007•32 citations

Efficient homodyne measurement of picosecond squeezed pulses with pulse shaping technique

Yujiro Eto, Akane Koshio, Akito Ohshiro +4 more

We report on the detection of picosecond pulsed squeezed light generated by an optical parametric amplification in a periodically poled MgO:LiNbO(3) waveguide. By using a temporally shaped local oscillator in a balanced homodyne detection, we obverved the squeezing of -5.0 dB below the shot noise level. The squeezing level at the exit of the waveguide was estimated to be -9.7±0.8 dB.

Optics Letters•Nov 28, 2011•32 citations

Observation of quadrature squeezing in a ?^(2) nonlinear waveguide using a temporally shaped local oscillator pulse

Yujiro Eto, Takashi Tajima, Yun Zhang +1 more

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.

Optics Express•Jul 1, 2008•45 citations

Temporal Characteristics of Pulsed Squeezing in a Nonlinear Optical Waveguide

Yujiro Eto, Akane Koshio, Akito Ohshiro +3 more

We experimentally investigate the temporal characteristics of picosecond squeezed pulses generated via an optical parametric amplification in a periodically poled MgO:LiNbO3 waveguide. The noise variances for the various time delays between the squeezed pulse and a local oscillator are measured using a balanced homodyne detector. The measured delay dependence is asymmetric, and this asymmetry indicates that the phase chirping of the squeezed pulse is different from that of the local oscillator pulse. We show that the observed squeezing can be improved by using the pulse shaping of the local oscillator.

Japanese Journal of Applied Physics•Mar 8, 2013•2 citations

Generation of femtosecond pulsed squeezed light in optical telecommunication band

Keiichi Hirano, Y. Takahashiy, Go Fujii +4 more

We have generated squeezed vacuum in optical telecommunication band by a single-pass parametric amplification in periodically poled lithium niobate. The measured noise reduction was 3.1 dB below the shot-noise level.

Conference on Lasers and Electro-Optics•Jan 1, 2006•0 citations
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.
We experimentally investigate the temporal characteristics of picosecond squeezed pulses generated via an optical parametric amplification in a periodically poled MgO:LiNbO3 waveguide. The noise variances for the various time delays between the squeezed pulse and a local oscillator are measured using a balanced homodyne detector. The measured delay dependence is asymmetric, and this asymmetry indicates that the phase chirping of the squeezed pulse is different from that of the local oscillator pulse. We show that the observed squeezing can be improved by using the pulse shaping of the local oscillator.