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 at 10.6 μm by resonantly enhanced degenerate four-wave mixing

Richard C. Lind, Duncan G. Steel, M. B. Klein, R. L. Abrams, Concetto R. Giuliano, R. K. Jain

Published Apr 1, 1979• 48 citations
Publisher

Abstract

A resonantly enhanced phase-conjugate 10.6-μm signal has been generated in the saturable absorber SF6. Direct evidence of aberration correction is shown through the use of far-field photographs taken with a pyroelectric vidicon camera. Reflection coefficients of 7% have been achieved in a few Torr of SF6 for a 2-cm interaction length.
DOI
10.1063/1.90833

Related papers

Multiline phase conjugation in resonant materials

Duncan G. Steel, Juan Francisco Lam

We present a direct experimental demonstration of multiwavelength phase conjugation through degenerate four-wave mixing. The experiments were performed using a multiline CO2 TEA laser with SF6 as the nonlinear medium. Using a vidicon to observe the signal in the far field, we show good aberration-correction ability. A qualitative description of the additional cross coupling is also provided.

Optics Letters•Jul 1, 1980•20 citations

Phase-conjugate characteristics of SF 6 by degenerate four-wave mixing at 10.6 μm

Bangwei Cai, Baida Lü, Xiang Sean Zhou +1 more

Degenerate-four-wave mixing (DFWM) is an important technique for the generation of phase-conjugate wave, to which much attention has been paid. In this paper. a tunalile CW CO2 1.aser is used as the pump sourse and gaseous SF6 as the nonlinear medium, the dependence of reflectivity of phase-conjugate wave generated by DFWM on the pump intensity, the pressure in SF6, the angle between the pump and probe beams as welt as the potarization of the optical fields etc, is investigated experimentatty and exptained theoretically. Peak reftectivity of 2.1x101 is abtained at P=4 Torr in the gaseous SF6. In the Doppler-free phase-conjugate spectrum of SF6 five absorption dips are observed and the spectral resolving power is measured to be about 3 MHz.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•May 1, 1990•0 citations

Doppler-free continuous-wave phase-conjugate spectrum of SF_6 by resonant degenerate four-wave mixing at 106 μm

Philippe Aubourg, J. P. Bettini, Govind Prasad Agrawal +4 more

A phase-conjugate signal has been obtained in SF(6) with a peak reflectivity of 1.2 x 10(-3) by using a cw CO(2) laser operating on the P(16) line. The degenerate four-wave mixing spectrum exhibits a Doppler-free structure with 2-MHz resolution. When the reflectivity spectrum is compared with the saturated-absorption spectrum, matching peaks in the reflectivity spectrum are found over an 80-MHz bandwidth.

Optics Letters•Aug 1, 1981•25 citations

Doppler–free CW phase–conjugate spectrum of SF6 by degenerate four-wane mixing at 10.6 μm

Jean-Luc Boulnois, Philippe Aubourg, Govind Prasad Agrawal

Recently phase conjugation at 10.6 μm has drawn considerable attention. Various nonlinear materials such as SF6, Co2, Ge, HgCdTe and doped KCI have been used to generate the conjugate wave through resonant degenerate four-wave mixing (DFWM). In most of the previous work, pulsed CO2 lasers were used.

Conference on Lasers and Electro-Optics•Jan 1, 1981•0 citations

Phase conjugation in Cr^4+:YAG at 106 μm

A. Brignon, J.-P. Huignard

Phase conjugation in a Cr(4+):YAG saturable absorber by degenerate four-wave mixing with nanosecond pulses at lambda = 1.06 mu m is demonstrated for the first time to our knowledge. An experimental phase-conjugate energy ref lectivity of ~2% and an overall eff iciency of ~0.4% are achieved. Because of the presence of absorbing dipoles oriented along specif ic directions, it is shown that the phase-conjugated beam can be made orthogonally polarized relative to the signal beam or to both pump beams with almost no reduction of the energy reflectivity.

Optics Letters•Aug 1, 1996•7 citations

Resonantly enhanced degenerate four-wave mixing of millimeter-wave radiation in gas

Nikolay A. Bogatov, Mikhail S. Gitlin, Aleksandr G. Litvak +2 more

Millimeter-wave phase conjugation was realized under resonantly enhanced degenerate four-wave mixing in gaseous carbonyl sulfide. The nonlinear wave interaction was caused by saturation of a transition between rotational levels. For radiation with \ensuremath{\lambda}=1.64 mm, phase-conjugate reflectivity of about 0.4% has been observed at a gas temperature of 200 K, and under optimal pressure.

Physical Review Letters•Dec 21, 1992•8 citations
Degenerate-four-wave mixing (DFWM) is an important technique for the generation of phase-conjugate wave, to which much attention has been paid. In this paper. a tunalile CW CO2 1.aser is used as the pump sourse and gaseous SF6 as the nonlinear medium, the dependence of reflectivity of phase-conjugate wave generated by DFWM on the pump intensity, the pressure in SF6, the angle between the pump and probe beams as welt as the potarization of the optical fields etc, is investigated experimentatty and exptained theoretically. Peak reftectivity of 2.1x101 is abtained at P=4 Torr in the gaseous SF6. In the Doppler-free phase-conjugate spectrum of SF6 five absorption dips are observed and the spectral resolving power is measured to be about 3 MHz.
Phase conjugation in a Cr(4+):YAG saturable absorber by degenerate four-wave mixing with nanosecond pulses at lambda = 1.06 mu m is demonstrated for the first time to our knowledge. An experimental phase-conjugate energy ref lectivity of ~2% and an overall eff iciency of ~0.4% are achieved. Because of the presence of absorbing dipoles oriented along specif ic directions, it is shown that the phase-conjugated beam can be made orthogonally polarized relative to the signal beam or to both pump beams with almost no reduction of the energy reflectivity.