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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13483
Title: Analysis of corrugated long-period gratings in slab waveguides and their polarization dependence
Authors: Liu Q.
Chiang K.S.
Rastogi, Vipul K.
Published in: Journal of Lightwave Technology
Abstract: We analyze theoretically the light transmission characteristics of corrugated long-period gratings formed in slab waveguides. The transmission spectra of the gratings show distinct rejection bands at specific wavelengths, known as the resonance wavelengths. We investigate in detail the phase-matching curves of the gratings, which govern the relationship between the resonance wavelength and the grating period. Thanks to the flexibility in the choice of the waveguide parameters, the phase-matching curves of a long-period waveguide grating can be different characteristically from those of a long-period fiber grating (LPFG), which implies that the former can exhibit much richer characteristics than the latter. Unlike an LPFG, the transmission spectrum of a long-period waveguide grating is in general sensitive to the polarization of light. Nevertheless, a proper choice of the waveguide and grating parameters can result in a polarization-independent rejection band. Long-period waveguide gratings should find potential applications in a wide range of integrated-optic waveguide devices and sensors. © 2003 IEEE.
Citation: Journal of Lightwave Technology (2003), 21(12): 3399-3405
URI: https://doi.org/10.1109/JLT.2003.821749
http://repository.iitr.ac.in/handle/123456789/13483
Issue Date: 2003
ISSN: 7338724
Author Scopus IDs: 56028259600
16309003700
7006364661
Author Affiliations: Liu, Q., Optoelectronics Research Centre, Department of Electronic Engineering, City University of Hong Kong, Hong Kong, Hong Kong
Chiang, K.S., Optoelectronics Research Centre, Department of Electronic Engineering, City University of Hong Kong, Hong Kong, Hong Kong
Rastogi, V., Optoelectronics Research Centre, Department of Electronic Engineering, City University of Hong Kong, Hong Kong, Hong Kong
Funding Details: Manuscript received June 23, 2003; revised September 4, 2003. This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China, under Project . CityU 1160/01E. The authors are with the Optoelectronics Research Centre and Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China (e-mail: eeksc@cityu.edu.hk). Digital Object Identifier 10.1109/JLT.2003.821749 Fig. 1. Refractive-index profile of a four-layer planar waveguide, where a corrugated long-period grating is introduced on the surface of the guiding layer.
Corresponding Author: Liu, Q.; Optoelectronics Research Centre, Department of Electronic Engineering, City University of Hong Kong, Hong Kong, Hong Kong
Appears in Collections:Journal Publications [PH]

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