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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 12 — Dec. 1, 2010
  • pp: 2488–2494

Pulsed- and continuous-wave difference-frequency generation in AlGaAs Bragg reflection waveguides

J. B. Han, D. P. Kang, P. Abolghasem, B. J. Bijlani, and A. S. Helmy  »View Author Affiliations


JOSA B, Vol. 27, Issue 12, pp. 2488-2494 (2010)
http://dx.doi.org/10.1364/JOSAB.27.002488


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Abstract

Pulsed- and continuous-wave type-I and type-II difference-frequency generations (DFGs) in monolithic AlGaAs Bragg reflection waveguides were comparatively investigated. Phase matching bandwidth of exceeding 40 nm was observed in all the processes. Highest difference-frequency (DF) power of 2.45 nW was obtained in continuous-wave type-II interaction with the average external pump and signal powers of 62.9 and 2.9 mW, respectively. The corresponding nonlinear conversion efficiency is about 1.3 × 10 3 % W 1 for a sample with a length of 1.5 mm. Using split-step Fourier method, the impacts of third-order nonlinearities including two-photon absorption and self-phase modulation on the efficiency of the DFG are numerically investigated. Furthermore, the adverse effects of group velocity mismatch and group velocity dispersion of the interacting frequencies on the efficiency of the pulsed nonlinear process are theoretically studied. Simulations indicate that the dominant factors in limiting the efficiency of the pulsed interaction are group velocity mismatch between pump and DF signal and two-photon absorption of the interacting waves.

© 2010 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(160.4330) Materials : Nonlinear optical materials
(190.2620) Nonlinear optics : Harmonic generation and mixing
(230.1480) Optical devices : Bragg reflectors

ToC Category:
Nonlinear Optics

History
Original Manuscript: July 22, 2010
Manuscript Accepted: September 24, 2010
Published: November 3, 2010

Citation
J. B. Han, D. P. Kang, P. Abolghasem, B. J. Bijlani, and A. S. Helmy, "Pulsed- and continuous-wave difference-frequency generation in AlGaAs Bragg reflection waveguides," J. Opt. Soc. Am. B 27, 2488-2494 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-12-2488

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