Calculation of quasi phasematching in optical parametric GaAs/AlGaAs waveguides

Kenneth L. Schepler; Justin B. Spring

doi:10.1117/12.808035

23 February 2009 Calculation of quasi phasematching in optical parametric GaAs/AlGaAs waveguides

Proceedings Volume 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII; 719708 (2009) https://doi.org/10.1117/12.808035
Event: SPIE LASE: Lasers and Applications in Science and Engineering, 2009, San Jose, California, United States

Abstract

Quasi phasematched domain periods for bulk and waveguide GaAs nonlinear frequency conversion were calculated. Waveguide beam confinement resulted in a decrease in effective refractive index and the magnitude of this index change was found to increase supralinearly with wavelength. Domain periodicity required for a 2.056-μm pumped, 10x10 μm² GaAs core, Al_0.5Ga_0.5As cladding waveguide OPO at degeneracy decreased from 60.4 μm for bulk GaAs to 57.9 μm for a rib waveguide and 49.8 μm for a buried waveguide in a GaAs OPO. Careful accounting for waveguide effects is necessary to fabricate a periodic waveguide structure with the desired function.

Citation Download Citation

Kenneth L. Schepler and Justin B. Spring "Calculation of quasi phasematching in optical parametric GaAs/AlGaAs waveguides", Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 719708 (23 February 2009); https://doi.org/10.1117/12.808035

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