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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14051
Title: Long-period gratings in planar optical waveguides
Authors: Rastogi, Vipul K.
Chiang K.S.
Published in: Applied Optics
Abstract: We present a theoretical analysis of light propagation in a four-layer planar waveguide that consists of a long-period grating (LPG) having a period of the order of 100 μm. By means of the coupled-mode theory, we show that such a structure is capable of coupling light from the fundamental guided mode to the cladding modes at specific wavelengths (resonance wavelengths) and thus results in sharp rejection bands in the transmission spectrum of the waveguide. Our numerical results show that the resonance wavelengths as well as the transmission spectrum can be significantly changed with the waveguide and grating parameters. A waveguide-based LPG should provide a useful approach to the design of a wide range of integrated-optic devices, including wavelength-tunable filters, switches, and environmental sensors. © 2002 Optical Society of America.
Citation: Applied Optics (2002), 41(30): 6351-6355
URI: https://doi.org/10.1364/AO.41.006351
http://repository.iitr.ac.in/handle/123456789/14051
Issue Date: 2002
ISSN: 1559128X
Author Scopus IDs: 7006364661
16309003700
Author Affiliations: Rastogi, V., Department of Electronic Engineering, Optoelectronics Research Centre, City University of Hong Kong, Tat Chee Avenue Hong Kong, Hong Kong
Chiang, K.S., Department of Electronic Engineering, Optoelectronics Research Centre, City University of Hong Kong, Tat Chee Avenue Hong Kong, Hong Kong
Appears in Collections:Journal Publications [PH]

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