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Proceedings Paper

Novel approach for efficient mid-infrared coherent emitters based on continuously phase-matched 'W' optical waveguide
Author(s): Zhian Jin; Nelson Tansu
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Paper Abstract

A novel 'W' optical waveguide using AlGaAs-GaAs semiconductor material systems is presented and analyzed for achieving a continuously-phase-matched difference frequency generation (DFG) nonlinear process. Our approach utilizes two near-IR lasers to obtain an efficient generation of coherent mid-IR radiation. By maintaining a continuous phase matching condition in our 'W'-waveguide, our studies show that nonlinear DFG process obtained from 920-nm and 1140-nm lasers with input powers at 0.5 Watts (with interaction length of 5-mm) results in coherent continuouswave (CW) power of ~ 0.13 mW at wavelength of 4.77-μm. The normalized conversion efficiency (ηnor) of the DFG process is ~ 40 W-1m-2, as a result of low spatial mode overlap. An optimized 'W' waveguide consisting of large index contrast core region structure, with an improved spatial mode overlap of the near and mid-IR modes, allows a significant improvement in the normalized conversion efficiency by up to approximately two orders of magnitude (ηnor > ~ 104 W-1m-2).

Paper Details

Date Published: 28 February 2006
PDF: 10 pages
Proc. SPIE 6115, Physics and Simulation of Optoelectronic Devices XIV, 61151V (28 February 2006); doi: 10.1117/12.646114
Show Author Affiliations
Zhian Jin, Lehigh Univ. (United States)
Nelson Tansu, Lehigh Univ. (United States)

Published in SPIE Proceedings Vol. 6115:
Physics and Simulation of Optoelectronic Devices XIV
Marek Osiński; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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