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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 21 — Nov. 1, 2007
  • pp: 3128–3130

Broadening of the phase-matching bandwidth in quasi-phase-matched second-harmonic generation using GaN-based Bragg reflection waveguide

Ritwick Das and K. Thyagarajan  »View Author Affiliations


Optics Letters, Vol. 32, Issue 21, pp. 3128-3130 (2007)
http://dx.doi.org/10.1364/OL.32.003128


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Abstract

We present an analysis of a high index core symmetric Bragg reflection waveguide (BRW) design based on a Ga N Al x Ga 1 x N system for efficient quasi-phase-matched second-harmonic generation for broadband applications. By choosing the fundamental frequency to be a BRW mode and suitably tailoring the overall dispersion characteristics, the strong dispersion of the second-harmonic mode is partially canceled, leading to phase matching between the fundamental and second-harmonic over a broad range of wavelengths. The crucial interplay between the dispersive behavior of the fundamental and second-harmonic wave manifests as a broad acceptance bandwidth of 33 nm accompanied with appreciable conversion efficiency ( 22.8 % W ) for a 10 mm long waveguide. The impact of tailoring the dispersion characteristics on the conversion efficiency is also discussed.

© 2007 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(230.1480) Optical devices : Bragg reflectors
(230.7390) Optical devices : Waveguides, planar

ToC Category:
Optical Devices

History
Original Manuscript: August 14, 2007
Revised Manuscript: September 19, 2007
Manuscript Accepted: September 22, 2007
Published: October 22, 2007

Citation
Ritwick Das and K. Thyagarajan, "Broadening of the phase-matching bandwidth in quasi-phase-matched second-harmonic generation using GaN-based Bragg reflection waveguide," Opt. Lett. 32, 3128-3130 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-21-3128


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