Flattop wideband wavelength converters based on cascaded sum and difference-frequency generation using step-chirped gratings

Amirhossein Tehranchi; Raman Kashyap

doi:10.1117/12.875154

21 February 2011 Flattop wideband wavelength converters based on cascaded sum and difference-frequency generation using step-chirped gratings

Amirhossein Tehranchi, Raman Kashyap

Author Affiliations +

Proceedings Volume 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X; 79171D (2011) https://doi.org/10.1117/12.875154
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

We investigate the role of step-chirped gratings (SCG) for flattening of conversion efficiency response and enhancing the pump bandwidth in cascaded sum and difference frequency generation (SFG + DFG) with a large pump wavelength difference. To obtain a flat response with maximum efficiency, using SCG instead of uniform grating with the same length, the appropriate critical period shifts are presented for the reasonable number of sections and chirp steps feasible for fabrication. Furthermore, it is shown that adding the section numbers for SCG structure increases the pump bandwidth.

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Amirhossein Tehranchi and Raman Kashyap "Flattop wideband wavelength converters based on cascaded sum and difference-frequency generation using step-chirped gratings", Proc. SPIE 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X, 79171D (21 February 2011); https://doi.org/10.1117/12.875154

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