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

Applied Physics Letters

Phase conjugation of mode scrambled optical beams: Application to spatial recovery and interbeam temporal information exchange

Ram Yahalom, Kazuo Kyuma, Amnon Yariv

Published Mar 30, 1987• 4 citations
Publisher

Abstract

Coupling of temporal information between two beams is demonstrated using a combination of a multimode fiber and a photorefractive passive phase conjugation mirror. It is shown that the polarization and spatial properties are fully recovered but temporal information is exchanged. The theoretical explanation for these phenomena and possible applications are discussed.

DOI
10.1063/1.98046

Related papers

Fidelity of polarization and spatial information recovery using a fiber-coupled phase-conjugate mirror

Yasuo Tomita, Ram Yahalom, Amnon Yariv

We report the investigation of polarization and spatial information recovery using a fiber-coupled phase-conjugate mirror. A marked dependence of the phase-conjugate output on the input-beam conditions is experimentally observed. A theoretical model for these phenomena is also discussed.

Optics Letters•Dec 1, 1987•10 citations

Phase conjugation and stimulated effects in photorefractive materials

Jack Feinberg

Photorefractive materials exhibit a large optical nonlinearity which can efficiently couple even weak optical beams. If the nonlinear coupling strength exceeds a certain threshold (whose value depends on geometry), stimulated beams appear. We will review recent experiments demonstrating the mischievous and often useful properties of these stimulated beams. For example, a single-beam incident on a crystal of photorefractive barium titanate can stimulate the generation of a phase-conjugate beam.

Journal of the Optical Society of America B•Feb 1, 1986•0 citations

Temporal reversal of picosecond optical pulses by holographic phase conjugation

C. Joubert, M.L. Roblin, R. Grousson

We theoretically discuss the use of holography to achieve the phase conjugation of temporal signals. The reversal of a particular asymmetric pulse envelope is experimentally demonstrated. The holographic material is a photorefractive crystal used in a four-wave mixing configuration.

Applied Optics•Nov 1, 1989•29 citations

Optical phase conjugation by degenerate four-wave mixing: spatial and temporal aspects

M.L. Roblin, C. Joubert, Herve Coic +2 more

We describe an experiment in phase conjugation using holographic degenerate four-wave mixing with picosecond pulses. Spatial and temporal distortions are simultaneously introduced on the probe beam, respectively, by a ground glass and a Gires-Tournois interferometer. We experimentally show that after it recrosses the ground glass we obtain a time reversed pulse on the reconstructed beam. Its temporal shape is the same as that without the ground glass. We theoretically discuss this result and show that in our configuration the temporal effect depends only on the hologram dimension parallel to the direction of propagation of the beam, while the spatial phase conjugation is related to the dimensions in the perpendicular plane.

Pure and Applied Optics Journal of the European Optical Society Part A•Jan 1, 1994•2 citations

Incoherent phase-conjugate backscattering in photorefractive media

Mordechai Segev, Amnon Yariv

Phase-conjugate backscattering in photorefractive (PR) materials, which can be considered a special case of two-beam coupling, involves interaction between two counterpropagating beams via light-induced reflection gratings. Since this backscattering results from interference between the beams, it requires mutual temporal coherence. Moreover, when one beam is self-generated, the input beam is required to have a long coherence length.

Annual Meeting Optical Society of America•Jan 1, 1991•0 citations

Introduction To And Applications Of Optical Phase Conjugation

Robert A. Fisher, J. McIver, A.F. Lange +3 more

Optical phase conjugation is concerned with the use of nonlinear optical effects to precisely reverse the direction of propagation of each plane wave in an arbitrary beam of light. This causes the return beam to exactly retrace the path of the incident beam, leading to many applications of automatic pointing and tracking (even in the presence of an inhomogeneous medium). The main goals of this course are familiarization with how each of the many nonlinear optical effects gives rise to a phase conjugate signal, and understanding and appreciation of the many potential applications for optical phase conjugation. Conjugation techniques involving Kerr-like degenerate four-wave mixing, resonant degenerate four-wave mixing, stimulated Brillouin scattering, photorefractive effects, surface phenomena, and others will be carefully reviewed. Applications of particular importance to this course will include distortion correction, pointing, tracking, laser-resonator design, optical information processing, etc. Throughout the course, key references will be identified for those wishing to pursue any topic more vigorously.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Nov 20, 1985•0 citations
Coupling of temporal information between two beams is demonstrated using a combination of a multimode fiber and a photorefractive passive phase conjugation mirror. It is shown that the polarization and spatial properties are fully recovered but temporal information is exchanged. The theoretical explanation for these phenomena and possible applications are discussed.
We describe an experiment in phase conjugation using holographic degenerate four-wave mixing with picosecond pulses. Spatial and temporal distortions are simultaneously introduced on the probe beam, respectively, by a ground glass and a Gires-Tournois interferometer. We experimentally show that after it recrosses the ground glass we obtain a time reversed pulse on the reconstructed beam. Its temporal shape is the same as that without the ground glass. We theoretically discuss this result and show that in our configuration the temporal effect depends only on the hologram dimension parallel to the direction of propagation of the beam, while the spatial phase conjugation is related to the dimensions in the perpendicular plane.
Optical phase conjugation is concerned with the use of nonlinear optical effects to precisely reverse the direction of propagation of each plane wave in an arbitrary beam of light. This causes the return beam to exactly retrace the path of the incident beam, leading to many applications of automatic pointing and tracking (even in the presence of an inhomogeneous medium). The main goals of this course are familiarization with how each of the many nonlinear optical effects gives rise to a phase conjugate signal, and understanding and appreciation of the many potential applications for optical phase conjugation. Conjugation techniques involving Kerr-like degenerate four-wave mixing, resonant degenerate four-wave mixing, stimulated Brillouin scattering, photorefractive effects, surface phenomena, and others will be carefully reviewed. Applications of particular importance to this course will include distortion correction, pointing, tracking, laser-resonator design, optical information processing, etc. Throughout the course, key references will be identified for those wishing to pursue any topic more vigorously.