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Long-period-grating-assisted optical add-drop filter based on mismatched twin-core photosensitive-cladding fiber
Honglin An1, Brian Ashton, Simon Fleming
1Optical Fibre Technology Centre, Australian Photonics Cooperative Research Centre, University of Sydney, 206 National Innovation Centre, Australian Technology Park, Eveleigh, NSW 1430, Australia. h.an@oftc.usyd.edu.au
Optics Letters
|February 20, 2004
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, co-directional spectrally selective cross coupling between the two cores can be realized with an efficiency of 90%.