|Title:||Leaky optical waveguide for high power applications|
Rastogi, Vipul K.
|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|
|Author Scopus IDs:||55547117241|
|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: email@example.com|
|Appears in Collections:||Journal Publications [PH]|
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