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

Physical Review A

Generation of picosecond squeezed pulses using an all-solid-state cw mode-locked source

E. M. Daly, A.S. Bell, Erling Riis, A. I. Ferguson

Published Apr 1, 1998• 9 citations
Publisher

Abstract

We have produced squeezed states of light using a degenerate optical parametric amplifier pumped by an all-solid-state cw mode-locked laser source. The process resulted in squeezed light pulses of less than 3 ps in duration. Up to 0.7 dB of amplitude-squeezed light at 1047 nm and 0.5 dB of noise reduction in vacuum were observed directly. The inferred squeezing level in both cases, after all propagation losses in the detection system and the effects of spatial and temporal mode overlap had been taken into account, was 1.8 dB.

DOI
10.1103/physreva.57.3127

Related papers

Generation of squeezed light and its effect on nonlinear optical processes

E. M. Daly, A.S. Bell, Erling Riis +1 more

Summary form only given.We describe the generation and detection of broadband squeezed states at 1047 nm in a lithium triborate (LiB/sub 3/O/sub 5/) degenerate optical parametric amplifier (DOPA). The light source used is a laser-diode-pumped additive pulse mode-locked Nd:LiYF/sub 4/ laser, which produces pulses 3 ps in duration at repetition rate of 140 MHz, and the average output power is 1 W. The fundamental light is frequency doubled in an external ring enhancement cavity, and the resulting high peak power of the doubled light means that it is possible to produce significant squeezing even in a single-pass or traveling-wave parametric amplifier.

Conference on Lasers and Electro-Optics•Nov 27, 2002•0 citations

Generation of multi-mode squeezed vacuum using pulse pumped fiber optical parametric amplifiers

Nannan Liu, Yuhong Liu, Jiamin Li +2 more

Multimode squeezed states are essential resources in quantum information processing and quantum metrology with continuous variables. Here we present the experimental generation of squeezed vacuum via the degenerate four wave mixing realized by pumping a piece of dispersion shifted fiber with mode-locked ultrafast pulse trains. The noise fluctuation is lower than the shot noise limit by 1.1 ± 0.08 dB (1.95 ± 0.17 dB after correction for detection losses). The detailed investigation illustrates that the results can be further improved by suppressing Raman scattering and by reshaping the spectrum of the local oscillator to achieve the required mode-matching of the homodyne detection system. Our study is useful for developing a compact fiber source of multi-mode squeezed vacuum.

Optics Express•Jan 27, 2016•11 citations

Generation of two-mode bright squeezed light using a noise-suppressed amplified diode laser

Yun Zhang, Kazuhiro Hayasaka, Katsuyuki Kasai

We present the generation of nonclassical state using an amplified diode laser as a light source. The intensity noise of an amplified diode laser was significantly suppressed and reached the shot noise limit at 15 MHz using both a filter cavity and resonant optical feedback. Frequency doubling efficiency of 66% and up to 120 mW output power of green has been achieved in cw second-harmonic generation from 1080 nm to 540 nm. Bright two-mode amplitude-squeezed state was generated from a type-II nondegenerate optical parametric amplifier pumped by generated green light. The measured noise reduction is 2.1+/-0.2 dB below the shot-noise level.

Optics Express•Jan 1, 2006•7 citations

Generation of strongly squeezed continuous-wave light at 1064 nm

Klaus Schneider, M. Lang, J. Mlynek +1 more

A compact and effcient source of amplitude-squeezed light is described. It employs a semi-monolithic degenerate MgO:LiNbO(3) optical parametric amplifier pumped by a frequency-doubled Nd:YAG laser at 532 nm. Injection-seeding of the amplifier by a 1064 nm wave permits active stabilization of the cavity length and stable operation. At a pump power of 380 mW, a maximum noise reduction of 6.5 dB in the amplitude fluctuations of the 0.2 mW 1064 nm wave was detected. The average detected noise reduction in continuous operation over 14 minutes was 6.2 dB. Taking the detection effciency into account, this corresponds to a squeezing of 7.2 dB in the emitted wave.

Optics Express•Feb 2, 1998•71 citations

Generation of femtosecond pulsed quadrature phase squeezed light

Hongyu Liu, Chen Li, Liu Ling +4 more

We demonstrate experimentally the short pulse amplitude squeezed light from a singly resonant synchronously pumped optical parametric oscillator (SPOPO). The SPOPO operates in the frequency degenerate case and below threshold, with using a periodically poled potassium titanyl phosphate crystal. The pump laser is the second harmonic of a ultrashort mode-locked femtosecond pulse at 850 nm. The reduction of quantum noise of 2.58 dB is obtained experimentally. The squeezing extent is deduced to be 4.48 dB.

Acta Physica Sinica•Jan 1, 2013•3 citations

Phase Locking of Pulsed Squeezed Light Generated by a Single-Pass Optical Parametric Amplifier

Yoshitaka Taguchi, Kenichi Oguchi, Zicong Xu +5 more

We propose and demonstrate a phase-locking scheme for squeezed vacuum generated by a single-pass optical parametric amplifier. Stable phase locking of picosecond squeezed vacuum with a squeezing level of −1.7 dB was achieved.

Conference on Lasers and Electro-Optics•Jan 1, 2022•0 citations
We have produced squeezed states of light using a degenerate optical parametric amplifier pumped by an all-solid-state cw mode-locked laser source. The process resulted in squeezed light pulses of less than 3 ps in duration. Up to 0.7 dB of amplitude-squeezed light at 1047 nm and 0.5 dB of noise reduction in vacuum were observed directly. The inferred squeezing level in both cases, after all propagation losses in the detection system and the effects of spatial and temporal mode overlap had been taken into account, was 1.8 dB.
Summary form only given.We describe the generation and detection of broadband squeezed states at 1047 nm in a lithium triborate (LiB/sub 3/O/sub 5/) degenerate optical parametric amplifier (DOPA). The light source used is a laser-diode-pumped additive pulse mode-locked Nd:LiYF/sub 4/ laser, which produces pulses 3 ps in duration at repetition rate of 140 MHz, and the average output power is 1 W. The fundamental light is frequency doubled in an external ring enhancement cavity, and the resulting high peak power of the doubled light means that it is possible to produce significant squeezing even in a single-pass or traveling-wave parametric amplifier.
Multimode squeezed states are essential resources in quantum information processing and quantum metrology with continuous variables. Here we present the experimental generation of squeezed vacuum via the degenerate four wave mixing realized by pumping a piece of dispersion shifted fiber with mode-locked ultrafast pulse trains. The noise fluctuation is lower than the shot noise limit by 1.1 ± 0.08 dB (1.95 ± 0.17 dB after correction for detection losses). The detailed investigation illustrates that the results can be further improved by suppressing Raman scattering and by reshaping the spectrum of the local oscillator to achieve the required mode-matching of the homodyne detection system. Our study is useful for developing a compact fiber source of multi-mode squeezed vacuum.
We present the generation of nonclassical state using an amplified diode laser as a light source. The intensity noise of an amplified diode laser was significantly suppressed and reached the shot noise limit at 15 MHz using both a filter cavity and resonant optical feedback. Frequency doubling efficiency of 66% and up to 120 mW output power of green has been achieved in cw second-harmonic generation from 1080 nm to 540 nm. Bright two-mode amplitude-squeezed state was generated from a type-II nondegenerate optical parametric amplifier pumped by generated green light. The measured noise reduction is 2.1+/-0.2 dB below the shot-noise level.
A compact and effcient source of amplitude-squeezed light is described. It employs a semi-monolithic degenerate MgO:LiNbO(3) optical parametric amplifier pumped by a frequency-doubled Nd:YAG laser at 532 nm. Injection-seeding of the amplifier by a 1064 nm wave permits active stabilization of the cavity length and stable operation. At a pump power of 380 mW, a maximum noise reduction of 6.5 dB in the amplitude fluctuations of the 0.2 mW 1064 nm wave was detected. The average detected noise reduction in continuous operation over 14 minutes was 6.2 dB. Taking the detection effciency into account, this corresponds to a squeezing of 7.2 dB in the emitted wave.
We demonstrate experimentally the short pulse amplitude squeezed light from a singly resonant synchronously pumped optical parametric oscillator (SPOPO). The SPOPO operates in the frequency degenerate case and below threshold, with using a periodically poled potassium titanyl phosphate crystal. The pump laser is the second harmonic of a ultrashort mode-locked femtosecond pulse at 850 nm. The reduction of quantum noise of 2.58 dB is obtained experimentally. The squeezing extent is deduced to be 4.48 dB.