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

Conference on Lasers and Electro-Optics

Phase Conjugation and Image-Retaining Reflection of KrF Laser Radiation at 2486Å

Irving J. Bigio, B. J. Feldman, Robert A. Fisher, Michael Slatkine

Published Jan 1, 1981• 1 citation
Publisher

Abstract

We report here the first observations of phase conjugation of KrF laser radiation at 2486Å. The laser employed was an injection-locked, unstable resonator, KrF double-discharge with 200 mJ, 20 ns output in a <0.1 Å bandwidth (coherence length ≈1 cm) nearly diffraction-limited beam.1 Using this laser three different nonlinear processes were investigated as to their phase conjugation and/or image retention properties: degenerate four-wave mixing, stimulated Brillouin scattering, and stimulated Raman scattering.

DOI
10.1364/cleo.1981.ths3

Related papers

Amplified phase conjugate reflection of KrF laser radiation

R. G., M. C. Gower

We report amplified phase conjugate reflection of KrF laser radiation at 249 nm using degenerate four-wave mixing in a solution of rhodamine 6G in ethanol. Reflectivities of ∼300% have been measured. Saturation of the reflectivity at high probe intensities was observed and the temporal dependence of the reflectivity has been investigated. The importance of mutual coherence of the probe and pump for the thermally induced nonlinearity involved in the process has been demonstrated.

Applied Physics Letters•Dec 1, 1981•37 citations

SOME THOUGHTS AND OBSERVATIONS OF PHASE CONJUGATION IN THE ULTRAVIOLET

B. J. Feldman, Irving J. Bigio, Robert A. Fisher +1 more

We report on ultraviolet phase conjugation studies using KrF, XeF, and quadrupled Nd : YAG lasers. Processes studied include stimulated Brillouin scattering, stimulated Raman scattering, and degenerate four-wave mixing. In some cases phase conjugate efficiencies of greater than 80% are observed. Implications and applications of these phenomena will be discussed.

Le Journal de Physique Colloques•Mar 1, 1983•0 citations

Phase conjugation of KrF laser radiation

R. G., M. C. Gower

Phase conjugation of radiation from a KrF laser (249 nm) is reported using degenerate four-wave mixing in CS(2) and in a variety of saturable absorbers. Dependence on input intensity and medium concentration is investigated. Reflectivities greater, similar2.5% have been measured. A thermal phase grating seems to be the mechanism involved.

Optics Letters•Nov 1, 1981•27 citations

Phase conjugation and image-retaining reflection of KrF laser radiation at 2486 Å

Irving J. Bigio, B. J. Feldman, Robert A. Fisher +1 more

IEEE Journal of Quantum Electronics•Dec 1, 1981•2 citations

Self-phase conjugation technique via four wave mixing of middle infrared radiation in a laser active medium

Alexander A. Ageichik, Oleg G. Kotyaev, Yu. A. Rezunkov +2 more

As it is known, self-conjugation of the IR laser beam via Brillouin radiation stimulated scattering phenomenon is not realised because of some physical limits on radiation intensity which are the principal limitations, to the present time. That is why, one of the promising technique of phase conjugation of infrared radiation is a self-conjugation of a laser beam wavefront via four wave interaction in a nonlinear medium with feed-back loop (FWMF) [1]. Unlike conventional our wave mixing schemes, the FWMF self-conjugation is supposed to be realised without any additional beams pumping a phase conjugation mirror.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jan 1, 1996•0 citations

Phase conjugation in CO2 laser medium: theory and experiment

А. А. Ионин, А. А. Котков, Anatolii P. Napartovich +2 more

Phase conjugation (PC) processes at degenerate four-wave mixing (DFWM) in the active medium of a pulsed e-beam controlled discharge CO2-laser were studied both experimentally and theoretically. The experiment was carried out with the following parameters: laser gas mixture CO2:N2:He=1:2:4, gas pressure 0.3 bar, active medium length 1.2 m, resonator length 12 m (17.7 m for single line laser), interaction angle ~10 mrad at DFWM without optical delay between probe wave and co-propagating pump one. Integral PC reflectivity (PCR) strongly depends on such parameters as: specific input energy (Fig. 1); intensity ratio for probe J3 and co-propagating pump J1 wave (Fig.2); coherency of the laser radiation, that varied by rotation of mutual polarization or with optical delay between probe wave and co-propagating pump one; geometry of DFWM; output mirror reflectance Rout (8-80%) (PCR was maximum with Rout of 8% but best quality of PC signal was observed with Rout =80%); gas mixture composition and pressure, being maximum for a mixture with a low fraction of helium and at higher pressure (up to 0.6 bar). A periodical dependence of PCR on optical delay between probe and co-propagating pump wave with periods 10−3 and 10−5 m was observed. The PCR did not depend on spectral content and a degree of linear polarization of the laser radiation.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jan 1, 1998•0 citations
We report here the first observations of phase conjugation of KrF laser radiation at 2486Å. The laser employed was an injection-locked, unstable resonator, KrF double-discharge with 200 mJ, 20 ns output in a <0.1 Å bandwidth (coherence length ≈1 cm) nearly diffraction-limited beam.1 Using this laser three different nonlinear processes were investigated as to their phase conjugation and/or image retention properties: degenerate four-wave mixing, stimulated Brillouin scattering, and stimulated Raman scattering.
As it is known, self-conjugation of the IR laser beam via Brillouin radiation stimulated scattering phenomenon is not realised because of some physical limits on radiation intensity which are the principal limitations, to the present time. That is why, one of the promising technique of phase conjugation of infrared radiation is a self-conjugation of a laser beam wavefront via four wave interaction in a nonlinear medium with feed-back loop (FWMF) [1]. Unlike conventional our wave mixing schemes, the FWMF self-conjugation is supposed to be realised without any additional beams pumping a phase conjugation mirror.
Phase conjugation (PC) processes at degenerate four-wave mixing (DFWM) in the active medium of a pulsed e-beam controlled discharge CO2-laser were studied both experimentally and theoretically. The experiment was carried out with the following parameters: laser gas mixture CO2:N2:He=1:2:4, gas pressure 0.3 bar, active medium length 1.2 m, resonator length 12 m (17.7 m for single line laser), interaction angle ~10 mrad at DFWM without optical delay between probe wave and co-propagating pump one. Integral PC reflectivity (PCR) strongly depends on such parameters as: specific input energy (Fig. 1); intensity ratio for probe J3 and co-propagating pump J1 wave (Fig.2); coherency of the laser radiation, that varied by rotation of mutual polarization or with optical delay between probe wave and co-propagating pump one; geometry of DFWM; output mirror reflectance Rout (8-80%) (PCR was maximum with Rout of 8% but best quality of PC signal was observed with Rout =80%); gas mixture composition and pressure, being maximum for a mixture with a low fraction of helium and at higher pressure (up to 0.6 bar). A periodical dependence of PCR on optical delay between probe and co-propagating pump wave with periods 10−3 and 10−5 m was observed. The PCR did not depend on spectral content and a degree of linear polarization of the laser radiation.