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Sixth moment optimization of multi-channel Bragg filters

Authors:	DA Shapiro AI Latkin

Institution:	^a Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, 1 Koptjug Ave, Novosibirsk, 630090, Russia ^b Novosibirsk State University, 2 Pirogov Str., Novosibirsk, 630090, Russia

Abstract:	The design of multichannel optical filter is studied theoretically. New efficient two-step method based on combination of 6-th moment minimization and straightforward numerical minimization is developed. It is applied to find a fiber Bragg grating profile with minimal refractive index variation for 5 ÷ 32 channels. Obtained results are closer to the theoretical limit than previously reported.

Keywords:	Optical fiber filters Optical communication WDM Distributed Bragg reflector lasers Convergence of numerical methods
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