|Title:||Large-core single-mode channel waveguide based on geometrically shaped leaky cladding|
Rastogi, Vipul K.
|Published in:||Applied Physics B: Lasers and Optics|
|Abstract:||We propose a leaky channel waveguide structure for large-mode-area single-mode operation. The proposed structure is characterized by a uniform rectangular core and a specially designed cladding, through which all the confined modes are leaky. Single-mode operation is ensured by choosing the waveguide parameters properly so that the differential leakage loss between the first two modes is sufficiently high. A general power-law cladding geometry profile is considered, which is solved by the effective-index method in conjunction with the transfer-matrix-method to obtain the effective indices and leakage losses of the modes. We show that, with a suitable choice of cladding parameters, the waveguide can demonstrate extended single-mode operation in the wavelength range 750-1600 nm with a core area as large as 100 μm2. Such a large confinement area for mode propagation can effectively suppress nonlinear optical effects. The waveguide is expected to find applications in the design of high-power lasers and amplifiers. © 2008 Springer-Verlag.|
|Citation:||Applied Physics B: Lasers and Optics (2008), 90(43924): 507-512|
|Author Scopus IDs:||55547117241|
|Author Affiliations:||Kumar, A., Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India|
Rastogi, V., Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India
Chiang, K.S., Department of Electronic Engineering, Optoelectronics Research Centre, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
|Corresponding Author:||Kumar, A.; Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India|
|Appears in Collections:||Journal Publications [PH]|
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