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Long-period-grating-assisted optical add–drop filter based on mismatched twin-core photosensitive-cladding fiber

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Abstract

A noninterferometric optical fiber add–drop channel filter based on a mismatched twin-core photosensitive-cladding fiber and long-period fiber grating is demonstrated. With assistance from the fiber grating, codirectional spectrally selective cross coupling between the two cores can be realized with an efficiency of 90%.

© 2004 Optical Society of America

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