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

Optics Letters

Bright squeezed-light generation by a continuous-wave semimonolithic parametric amplifier

K. Schneider, Robert Bruckmeier, Hauke Hansen, Stephan Schiller, J. Mlynek

Published Sep 1, 1996• 64 citations
Publisher

Abstract

Continuous-wave amplitude-squeezed light at 1064 nm has been generated with excellent long-term stability by use of a dual-port type I degenerate optical parametric amplifier pumped by a frequency-doubled Nd:YAG laser. A seed wave at 1064 nm is resonantly injected through the low-transmission cavity port, whereas the parametrically deamplified and squeezed output wave is extracted from the high-transmission port. Amplitude noise reduction of as much as 4.3 dB is observed directly at an output power of 0.15 mW. Stable noise suppression exceeding 3.8 dB is obtained for several hours by phase locking of the pump wave. The longterm stability and simplicity make this device suitable for sub-shot-noise metrology.

DOI
10.1364/ol.21.001396

Related papers

Stable bright squeezed light by optical parametric deamplification in a semi-monolithic resonator

Robert Bruckmeier, К. R. Schneider, Hauke Hansen +2 more

Summary form only given. We report on the development and characterization of a novel source of bright squeezed light based on parametric deamplification of a seed wave. The device is both simple to implement and exhibits excellent temporal stability. A diode-pumped Nd:YAG laser serves as the primary source of the system. Most of the laser power is frequency doubled in a semi-monolithic MgO:LiNbO/sub 3/ standing wave cavity to provide the pump wave at 532 nm for a dual port degenerate optical parametric amplifier (DOPA). The DOPA resonator consists of a MgO:LiNbO/sub 3/-crystal and a concave external mirror mounted on a piezoelectric transducer (PZT). A seed wave at 1064 nm is resonantly injected through the spherically polished endface of the crystal, which is coated with a high reflector at 1064 and 532 nm. Degenerate operation is achieved by stabilization of the cavity length such that the seed wave is resonant. The external mirror, which is highly transmitting at 532 nm and has a reflectivity of 96% at 1064 nm, is used both for incoupling of the pump wave and for extraction of the parametrically deamplified and squeezed output infrared wave. The relative phase between pump and seed wave is stabilized to maximum deamplification by a lock-in technique to ensure stable amplitude squeezing of the DOPA.

Quantum Electronics and Laser Science Conference•Jun 7, 1996•0 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 continuous-wave bright-squeezed light

Stephan Schiller, Gerd Breitenbach, Silvania F. Pereira +3 more

We discuss different approaches to the generation of bright amplitude-squeezed light using second-order nonlinear effects in optical cavities. A 0.2 mW beam at 1064 nm exhibiting 4 dB squeezing has been generated using a phase-sensitive type-I parametric amplifier pumped by a frequency-doubled Nd:YAG laser. In applying frequency-doubling processes to the generation of amplitude-squeezed light, the appearance of parasitic parametric oscillation must be considered. This effect has been observed in a singly-resonant frequency doubler. We also describe recent developments in optical cavity design for doubly-resonant frequency-doubling. Finally, we show theoretically that phase-mismatched second-harmonic generation in an optical cavity can be employed to generate a strong effective Kerr nonlinearity. This system appears promising for achieving optical bistability and for generating squeezed light of high power. Keywords: Non-classical light, squeezed light, amplitude squeezing, nonlinear op...

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 26, 1995•6 citations

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

Fiber-based narrowband bright squeezed light generation by double-pass parametric amplification

Tan, Tianyi, Changsheng Yang, Qilai Zhao +4 more

The squeezed states of light become more and more important in the fields of quantum enhanced precision measurement and quantum information. To get this vital continuous variable quantum resource, the generation of squeezed states of light becomes a key factor. In this paper, a compact telecom fiber-based bright squeezed light (BSL) generator is demonstrated. To our knowledge, this is the first time that BSL has been reported in a fiber-based system to date. To obtain the BSL, a double-pass parametric amplifier based on surface-coated lithium niobate waveguide is employed. When the 1550 nm seed laser of the parametric amplifier is blocked, a stable 1.85 dB squeezed vacuum is obtained. With injected seed power of 80 μW, an output power of 18 μW and a squeezing value of 1.04 dB are achieved of the BSL at 1550 nm. Due to the good mode matching in the fiber and the absence of the resonant cavity, this flexible and compact BSL generator has the potential to be useful in out-of-the-laboratory quantum technologies. Moreover, the BSL has a narrow spectral width of 30 kHz, which is inherited from a narrow-linewidth single-frequency seed laser. In addition to being free from the wavelength-dependent losses, the narrowband BSL is also beneficial to improve the signal-to-noise ratio of quantum-enhanced precision measurement.

arXiv:2001.07353•Jan 21, 2020•1 citation

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
Continuous-wave amplitude-squeezed light at 1064 nm has been generated with excellent long-term stability by use of a dual-port type I degenerate optical parametric amplifier pumped by a frequency-doubled Nd:YAG laser. A seed wave at 1064 nm is resonantly injected through the low-transmission cavity port, whereas the parametrically deamplified and squeezed output wave is extracted from the high-transmission port. Amplitude noise reduction of as much as 4.3 dB is observed directly at an output power of 0.15 mW. Stable noise suppression exceeding 3.8 dB is obtained for several hours by phase locking of the pump wave. The longterm stability and simplicity make this device suitable for sub-shot-noise metrology.
Summary form only given. We report on the development and characterization of a novel source of bright squeezed light based on parametric deamplification of a seed wave. The device is both simple to implement and exhibits excellent temporal stability. A diode-pumped Nd:YAG laser serves as the primary source of the system. Most of the laser power is frequency doubled in a semi-monolithic MgO:LiNbO/sub 3/ standing wave cavity to provide the pump wave at 532 nm for a dual port degenerate optical parametric amplifier (DOPA). The DOPA resonator consists of a MgO:LiNbO/sub 3/-crystal and a concave external mirror mounted on a piezoelectric transducer (PZT). A seed wave at 1064 nm is resonantly injected through the spherically polished endface of the crystal, which is coated with a high reflector at 1064 and 532 nm. Degenerate operation is achieved by stabilization of the cavity length such that the seed wave is resonant. The external mirror, which is highly transmitting at 532 nm and has a reflectivity of 96% at 1064 nm, is used both for incoupling of the pump wave and for extraction of the parametrically deamplified and squeezed output infrared wave. The relative phase between pump and seed wave is stabilized to maximum deamplification by a lock-in technique to ensure stable amplitude squeezing of the DOPA.
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 discuss different approaches to the generation of bright amplitude-squeezed light using second-order nonlinear effects in optical cavities. A 0.2 mW beam at 1064 nm exhibiting 4 dB squeezing has been generated using a phase-sensitive type-I parametric amplifier pumped by a frequency-doubled Nd:YAG laser. In applying frequency-doubling processes to the generation of amplitude-squeezed light, the appearance of parasitic parametric oscillation must be considered. This effect has been observed in a singly-resonant frequency doubler. We also describe recent developments in optical cavity design for doubly-resonant frequency-doubling. Finally, we show theoretically that phase-mismatched second-harmonic generation in an optical cavity can be employed to generate a strong effective Kerr nonlinearity. This system appears promising for achieving optical bistability and for generating squeezed light of high power. Keywords: Non-classical light, squeezed light, amplitude squeezing, nonlinear op...
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.
The squeezed states of light become more and more important in the fields of quantum enhanced precision measurement and quantum information. To get this vital continuous variable quantum resource, the generation of squeezed states of light becomes a key factor. In this paper, a compact telecom fiber-based bright squeezed light (BSL) generator is demonstrated. To our knowledge, this is the first time that BSL has been reported in a fiber-based system to date. To obtain the BSL, a double-pass parametric amplifier based on surface-coated lithium niobate waveguide is employed. When the 1550 nm seed laser of the parametric amplifier is blocked, a stable 1.85 dB squeezed vacuum is obtained. With injected seed power of 80 μW, an output power of 18 μW and a squeezing value of 1.04 dB are achieved of the BSL at 1550 nm. Due to the good mode matching in the fiber and the absence of the resonant cavity, this flexible and compact BSL generator has the potential to be useful in out-of-the-laboratory quantum technologies. Moreover, the BSL has a narrow spectral width of 30 kHz, which is inherited from a narrow-linewidth single-frequency seed laser. In addition to being free from the wavelength-dependent losses, the narrowband BSL is also beneficial to improve the signal-to-noise ratio of quantum-enhanced precision measurement.
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.