Enhanced continuous-wave four-wave mixing efficiency in nonlinear AlGaAs waveguides

Enhancements of the continuous-wave four-wave mixing conversion efficiency and bandwidth are accomplished through the application of plasma-assisted photoresist reflow to reduce the sidewall roughness of sub-square-micron-modal area waveguides. Nonlinear AlGaAs optical waveguides with a propagation...

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Bibliographic Details
Published in:Optics express 2014-11, Vol.22 (22), p.26814-26824
Main Authors: Apiratikul, Paveen, Wathen, Jeremiah J, Porkolab, Gyorgy A, Wang, Bohan, He, Lei, Murphy, Thomas E, Richardson, Christopher J K
Format: Article
Language:English
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Summary:Enhancements of the continuous-wave four-wave mixing conversion efficiency and bandwidth are accomplished through the application of plasma-assisted photoresist reflow to reduce the sidewall roughness of sub-square-micron-modal area waveguides. Nonlinear AlGaAs optical waveguides with a propagation loss of 0.56 dB/cm demonstrate continuous-wave four-wave mixing conversion efficiency of -7.8 dB. Narrow waveguides that are fabricated with engineered processing produce waveguides with uncoated sidewalls and anti-reflection coatings that show group velocity dispersion of +0.22 ps²/m. Waveguides that are 5-mm long demonstrate broadband four-wave mixing conversion efficiencies with a half-width 3-dB bandwidth of 63.8-nm.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.22.026814