Type-0 second order nonlinear interaction in monolithic waveguides of isotropic semiconductors
Author(s) -
Payam Abolghasem,
Junbo Han,
Bhavin J. Bijlani,
Amr S. Helmy
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.012681
Subject(s) - optics , omega , birefringence , materials science , second harmonic generation , phase matching , nonlinear optics , isotropy , bragg's law , waveguide , reflection (computer programming) , physics , optoelectronics , laser , quantum mechanics , computer science , diffraction , programming language
We report the observation of type-0 phase-matching in bulk z-grown Al(x)Ga(1-x)As Bragg reflection waveguides where TM-polarized second-harmonic is generated using TM-polarized pump. For a pulsed pump with 1.8 ps temporal width and an average power of 3.3 mW, secondharmonic power of 16 microW was detected at 1567.8 nm. The normalized nonlinear conversion efficiency was obtained to be 2.84 x 10(3) %W(-1)cm(-2) in a 2.2 mm long waveguide. The highly versatile modal birefringence in Bragg reflection waveguides enabled the phase-matching of the three modalities; namely type-0 TM(omega)-->TM(2omega), type-I TE(omega)-->TM(2omega) and type-II TE(omega)+TMomega-->TE(2omega) interactions to simultaneously take place within a spectral bandwidth as small as 17 nm.
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