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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14036
Title: Leaky optical waveguide for high power applications
Authors: Kumar A.
Rastogi, Vipul K.
Chiang K.S.
Published in: Applied Physics B: Lasers and Optics
Abstract: We propose a novel optical planar waveguide structure for single-mode operation. The proposed structure has a uniform core and a leaky cladding. The cladding is characterized by a refractive-index profile that increases with the distance from the core. Such a structure supports leaky modes. A careful design can ensure a low leakage loss for the fundamental mode and much higher leakage losses for higher-order modes. With all the high-order modes stripped off, the waveguide supports effectively only the fundamental mode even with a large core. We introduce a class of power-law cladding profiles to demonstrate large-core single-mode operation with the structure. The effects of the profile parameters on single-mode operation are investigated by calculating the leakage losses of the first two modes using the transfer-matrix method. Owing to its large confinement area for single-mode operation, the proposed structure can suppress nonlinear effects effectively and is expected to find applications in the design of high power waveguide lasers and amplifiers.
Citation: Applied Physics B: Lasers and Optics (2006), 85(1): 11-16
URI: https://doi.org/10.1007/s00340-006-2425-5
http://repository.iitr.ac.in/handle/123456789/14036
Issue Date: 2006
ISSN: 9462171
Author Scopus IDs: 55547117241
7006364661
16309003700
Author Affiliations: Kumar, A., Department of Physics, Indian Institute of Technology Roorkee, Roorkee - 247 667, India
Rastogi, V., Department of Physics, Indian Institute of Technology Roorkee, Roorkee - 247 667, India
Chiang, K.S., Department of Electronic Engineering, Optoelectronics Research Centre, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
Corresponding Author: Rastogi, V.; Department of Physics, Indian Institute of Technology Roorkee, Roorkee - 247 667, India; email: vipul.rastogi@osa.org
Appears in Collections:Journal Publications [PH]

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