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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. 3 — Mar. 1, 2007
  • pp: 419–429

Femtosecond recording and time-resolved readout of spatial gratings in lithium niobate crystals

Boris Sturman, Oliver Beyer, Dominik Maxein, and Karsten Buse  »View Author Affiliations


JOSA B, Vol. 24, Issue 3, pp. 419-429 (2007)
http://dx.doi.org/10.1364/JOSAB.24.000419


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Abstract

Experimental and theoretical results on recording of spatial gratings with interfering femtosecond pulses at 388 nm and time-resolved Bragg-matched readout at 776 nm are presented for Li Nb O 3 crystals. These include dependences of the diffraction intensity on the time delay between probe and pump pulses, on the pump intensity and angle, and on the crystal composition. The grating buildup involves instantaneous and quasi-permanent changes of the refractive index and the absorption coefficient. These changes are due to Kerr and two-photon absorption effects and the modulation of photoexcited carriers, respectively. A good agreement between theory and experiment is achieved. Our analysis provides an understanding of nonlinear optical phenomena in Li Nb O 3 crystals on the femtosecond time scale. The theory is applicable to a large range of optical materials with modestly wide, 3 to 5 eV , bandgap.

© 2007 Optical Society of America

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(160.3730) Materials : Lithium niobate
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Diffraction and Gratings

History
Original Manuscript: June 2, 2006
Revised Manuscript: October 17, 2006
Manuscript Accepted: October 19, 2006
Published: February 15, 2007

Citation
Boris Sturman, Oliver Beyer, Dominik Maxein, and Karsten Buse, "Femtosecond recording and time-resolved readout of spatial gratings in lithium niobate crystals," J. Opt. Soc. Am. B 24, 419-429 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-3-419


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