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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 30 — Oct. 20, 2009
  • pp: 5678–5682

Ultrabroadband midinfrared generation by using group-velocity-dispersion tailoring in a Bragg reflection waveguide for a difference- frequency-generation process

Ritwick Das and K. Thyagarajan  »View Author Affiliations


Applied Optics, Vol. 48, Issue 30, pp. 5678-5682 (2009)
http://dx.doi.org/10.1364/AO.48.005678


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Abstract

We propose a novel scheme for ultrabroadband midinfrared (mid-IR) generation using quasi-phase-matched difference-frequency generation (DFG) in a Ga N / Al x Ga 1 x N based Bragg reflection waveguide (BRW). By optimally tailoring the phase- and group-velocity dispersion properties of symmetric BRWs, we show that the phase-matching condition for a DFG process could be maintained over a broad range of signal wavelengths. This could lead to generation of an 700 nm broad idler close to 3.26 μm wavelength. Since the idea is based on dispersion compensation using photonic bandgap geometry, we can shift the broadband features to any desired spectral region and for any material system within the constraints imposed by the transparency of nonlinear materials. We also investigate the possibility of broadband mid-IR generation using pump sources with broad spectral width.

© 2009 Optical Society of America

OCIS Codes
(230.1480) Optical devices : Bragg reflectors
(230.7390) Optical devices : Waveguides, planar
(190.4975) Nonlinear optics : Parametric processes
(230.7405) Optical devices : Wavelength conversion devices

ToC Category:
Optical Devices

History
Original Manuscript: August 19, 2009
Revised Manuscript: September 21, 2009
Manuscript Accepted: September 25, 2009
Published: October 12, 2009

Citation
Ritwick Das and K. Thyagarajan, "Ultrabroadband midinfrared generation by using group-velocity-dispersion tailoring in a Bragg reflection waveguide for a difference-frequency-generation process," Appl. Opt. 48, 5678-5682 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-30-5678

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