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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 5 — May. 1, 2007
  • pp: 1166–1177

Stimulated Rayleigh–Bragg scattering in a three-photon absorbing medium and its phase-conjugation property

Guang S. He, Qingdong Zheng, and Paras N. Prasad  »View Author Affiliations


JOSA B, Vol. 24, Issue 5, pp. 1166-1177 (2007)
http://dx.doi.org/10.1364/JOSAB.24.001166


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Abstract

We show that the backward-stimulated Rayleigh–Bragg scattering (SRBS) can be efficiently generated in a three-photon absorbing medium. Compared with all other known stimulated (such as Brillouin and Raman) scattering effects, the observed effect exhibits the following three features: (i) no frequency shift, (ii) a lower pump threshold, and (iii) no critical requirement for pump spectral linewidths within a range of Δ ν ¯ 1 cm 1 . The specific nonlinear scattering medium is a three-photon absorbing chromophore solution (PRL-OT04 in chloroform), pumped by 1064 nm laser pulses of nanoseconds duration but with three different spectral linewidths. The mechanism for generating backward SRBS in a three-photon active medium is the formation of a stationary Bragg grating enhanced by three-photon-absorption-associated refractive index changes. A superior optical phase-conjugation property of the backward SRBS beam has been experimentally demonstrated by employing two different optical setups. In both cases, a specially introduced aberration influence of 4 5 mrad can be basically removed by the backward SRBS beam that retains a much smaller beam divergence of 0.4 mrad .

© 2007 Optical Society of America

OCIS Codes
(190.4180) Nonlinear optics : Multiphoton processes
(190.5040) Nonlinear optics : Phase conjugation
(190.5890) Nonlinear optics : Scattering, stimulated

ToC Category:
Nonlinear Optics

History
Original Manuscript: July 31, 2006
Revised Manuscript: January 15, 2007
Manuscript Accepted: January 20, 2007
Published: April 17, 2007

Citation
Guang S. He, Qingdong Zheng, and Paras N. Prasad, "Stimulated Rayleigh-Bragg scattering in a three-photon absorbing medium and its phase-conjugation property," J. Opt. Soc. Am. B 24, 1166-1177 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-5-1166

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