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

Cascading phase shift and multivalued response in counterpropagating frequency-nondegenerate parametric amplifiers

Katia Gallo, Pascal A. Baldi, Marc de Micheli, Daniel B. Ostrowsky, Gaetano Assanto

Published Jul 1, 2000• 23 citations
Publisher

Abstract

We propose and analyze a novel geometry for all-optical processing of low-power signals that is based on a frequency-nondegenerate counterpropagating parametric amplifier. The stationary response in the cascading regime exhibits multivalued solutions with enhanced nonlinear phase shifts. Implementation in a quasi-phase-matched LiNbO(3) waveguide is discussed.

DOI
10.1364/ol.25.000966

Related papers

Quadratic cascading in counterpropagating parametric amplifiers

Katia Gallo, Pascal A. Baldi, Marc de Micheli +2 more

Summary form only given. We propose a novel scheme for all-optical processing low-power signals at /spl sim/1.55 /spl mu/m via a high power counter-propagating pump wave at /spl sim/800 nm, based on quadratic cascading effects in a counter-propagating optical parametric amplifier. Co-propagating with the pump, is assumed to occur in a QPM LiNbO/sub 3/ soft-proton-exchanged (SPE) channel waveguide.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Nov 11, 2002•0 citations

Optical-frequency balanced mixer

Jonathan R. Kurz, Krishnan R. Parameswaran, Rostislav V. Roussev +1 more

Optical signal processing devices based on quasi-phase-matched three-wave mixing and cascaded three-wave mixing in guided-wave geometries have been demonstrated to operate efficiently at practical pump-power levels. We describe operation of such devices in a balanced mode that allows mixing without wavelength offset and separation of mixed output from pump and signal input without wavelength-selective filters. We present a design for an optical-frequency balanced mixer using quasi-phase-matched, cascaded second-order nonlinear processes. Using this design, we fabricated a balanced mixer in periodically poled lithium niobate waveguides that has the expected linear and nonlinear optical performance.

Optics Letters•Aug 15, 2001•12 citations

Novel Polarisation-assisted Phase Sensitive Optical Signal Processor Requiring Low Nonlinear Phase Shifts

Francesca R. Parmigiani, Graham Hesketh, Radan Slavı́k +3 more

We demonstrate a new scheme to achieve binary step-like phase response and high phase-sensitive extinction ratio at low powers. Phase-sensitive operation is achieved by polarization filtering phase-locked signal/idler in a degenerate dual-pump vector parametric amplifier.

•Jan 1, 2014•4 citations

Traveling-wave optical parametric amplifier: investigation of its phase-sensitive and phase-insensitive gain response

Sang-Kyung Choi, Ruo-Ding Li, Chonghoon Kim +1 more

We experimentally investigate the gain response of a frequency-degenerate but polarization-nondegenerate traveling-wave optical parametric amplifier that consists of a type II phase-matched potassium titanyl phosphate crystal pumped by a frequency-doubled Q-switched mode-locked Nd:YAG laser. Both the optical phase-sensitive and phase-insensitive configurations of the parametric amplifier are studied. Experimental results are in excellent agreement with the theory of an optical parametric amplifier when the Gaussian-beam nature of the various fields is taken into account. In the phase-sensitive configuration a gain of >100 (20 dB) could be easily obtained in the amplified quadrature, which is limited only by the available pump power. Because of gain-induced diffraction and phase fluctuations, however, maximum deamplification in the orthogonal quadrature is limited to <0.5(-3 dB).

Journal of the Optical Society of America B•Jul 1, 1997•35 citations

Negative group velocities in cascading χ (2) nonlinear optical interactions

Stefano Longhi

Cascading second-order nonlinear processes in quasi-phase matching (QPM) nonlinear crystals can strongly affect the effective group velocity of a propagating optical pulse, leading to superluminal or even negative transit times. With reference to a QPM LiNbO 3 parametric amplifier, we propose a device in which the transit time of spectrally narrow optical pulses at signal wavelength of 1.55 μm can be controlled by the pump intensity and may be pushed to negative values under experimentally achievable pump power levels.

Europhysics Letters (EPL)•Oct 1, 2002•3 citations

Slowing and stopping photons using cascaded parametric conversion in QPM waveguides

Jacob B. Khurgin

A new tunable scheme for slowing down and stopping light using the parametric processes in the phase shifted quasi-phase matched waveguides is proposed and its performance is evaluated.

Conference on Lasers and Electro-Optics•Jan 1, 2005•0 citations
We propose and analyze a novel geometry for all-optical processing of low-power signals that is based on a frequency-nondegenerate counterpropagating parametric amplifier. The stationary response in the cascading regime exhibits multivalued solutions with enhanced nonlinear phase shifts. Implementation in a quasi-phase-matched LiNbO(3) waveguide is discussed.
Optical signal processing devices based on quasi-phase-matched three-wave mixing and cascaded three-wave mixing in guided-wave geometries have been demonstrated to operate efficiently at practical pump-power levels. We describe operation of such devices in a balanced mode that allows mixing without wavelength offset and separation of mixed output from pump and signal input without wavelength-selective filters. We present a design for an optical-frequency balanced mixer using quasi-phase-matched, cascaded second-order nonlinear processes. Using this design, we fabricated a balanced mixer in periodically poled lithium niobate waveguides that has the expected linear and nonlinear optical performance.
We experimentally investigate the gain response of a frequency-degenerate but polarization-nondegenerate traveling-wave optical parametric amplifier that consists of a type II phase-matched potassium titanyl phosphate crystal pumped by a frequency-doubled Q-switched mode-locked Nd:YAG laser. Both the optical phase-sensitive and phase-insensitive configurations of the parametric amplifier are studied. Experimental results are in excellent agreement with the theory of an optical parametric amplifier when the Gaussian-beam nature of the various fields is taken into account. In the phase-sensitive configuration a gain of >100 (20 dB) could be easily obtained in the amplified quadrature, which is limited only by the available pump power. Because of gain-induced diffraction and phase fluctuations, however, maximum deamplification in the orthogonal quadrature is limited to <0.5(-3 dB).
Cascading second-order nonlinear processes in quasi-phase matching (QPM) nonlinear crystals can strongly affect the effective group velocity of a propagating optical pulse, leading to superluminal or even negative transit times. With reference to a QPM LiNbO 3 parametric amplifier, we propose a device in which the transit time of spectrally narrow optical pulses at signal wavelength of 1.55 μm can be controlled by the pump intensity and may be pushed to negative values under experimentally achievable pump power levels.