Broadband photorefractive phase conjugation in a dispersive scheme

P. Apai, S. Lakó, R. Szipócs, M. B. Danailov

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Degenerative wave mixing in photorefractive (PR) crystals is suitable for the elimination of wavefront distortions and for beam cleaning; however, traditional schemes are restricted to monochromatic light sources of macroscopic coherence length. We report on experimental results which demonstrate that our novel disperse arrangement is well suited to PR phase conjugation of broadband radiation emitted by cw and femtosecond lasers. The efficiency of the wave mixing process depends on the contrast and length of the index grating produced in the PR crystal. In order to improve the efficiency we disperse the broadband laser beam perpendicular to the plane of propagation by a diffraction grating. The different spectral components appear spatially decomposed in the focal plane of a cylindrical lens, where the PR crystal is placed. We review our results in the cw regime and, for the first time, we report on experiments with femtosecond pulses, too. The PR crystal was an undoped BaTiO3 used in "CAT" self-pumped phase conjugation configuration. The light sources were Ti-sapphire lasers. The performance of the novel scheme was investigated in different conditions, and we observed efficient PC up to tens of nanometers of spectral bandwidth.

Original languageEnglish
Pages (from-to)444-448
Number of pages5
JournalLaser Physics
Volume10
Issue number2
Publication statusPublished - Mar 2000

Fingerprint

Photorefractive crystals
phase conjugation
broadband
Ultrashort pulses
crystals
light sources
Monochromators
Diffraction gratings
Wavefronts
gratings (spectra)
Sapphire
cleaning
lasers
Laser beams
Light sources
elimination
Cleaning
Lenses
sapphire
lenses

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Atomic and Molecular Physics, and Optics

Cite this

Apai, P., Lakó, S., Szipócs, R., & Danailov, M. B. (2000). Broadband photorefractive phase conjugation in a dispersive scheme. Laser Physics, 10(2), 444-448.

Broadband photorefractive phase conjugation in a dispersive scheme. / Apai, P.; Lakó, S.; Szipócs, R.; Danailov, M. B.

In: Laser Physics, Vol. 10, No. 2, 03.2000, p. 444-448.

Research output: Contribution to journalArticle

Apai, P, Lakó, S, Szipócs, R & Danailov, MB 2000, 'Broadband photorefractive phase conjugation in a dispersive scheme', Laser Physics, vol. 10, no. 2, pp. 444-448.
Apai, P. ; Lakó, S. ; Szipócs, R. ; Danailov, M. B. / Broadband photorefractive phase conjugation in a dispersive scheme. In: Laser Physics. 2000 ; Vol. 10, No. 2. pp. 444-448.
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