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Proceedings Paper

Effective-index-based matrix method: a computationally simpler alternative to BPM for integrated optics design
Author(s): S. K. Lahiri; J. C. Biswas; P. Ganguly; Rabindra Nath Chakraborty
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Paper Abstract

The 2D and 3D beam propagation method (BPM) which is now widely used for the design of fiber-optic and integrated-optic components is highly computer-intensive. The matrix method, which is computationally much simpler and faster, was used to analyze 2D planar multi-layer structures. The method has now been applied to 3D channel waveguides by transforming the 2D refractive index profile over the cross-section of the channel waveguide to a 1D effective index profile and discretizing the profile into thin layers. The effective index based matrix method (EIMM) has been used to compute the guided-mode propagation constants, the coupling length of directional couplers and the bending loss in curved waveguides for Ti- indiffused LiNbO3 channel waveguides. The computed results agree closely with available experimental results. The method may also be used to compute field profiles in single and coupled waveguides. A versatile computer software is being developed to implement the above method for the design of optical waveguides and related components/devices on different substrates realized by in-diffusion, ion exchange and other techniques.

Paper Details

Date Published: 28 April 1999
PDF: 9 pages
Proc. SPIE 3666, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98, (28 April 1999); doi: 10.1117/12.347919
Show Author Affiliations
S. K. Lahiri, Indian Institute of Technology/Kharagpur (India)
J. C. Biswas, Indian Institute of Technology/Kharagpur (India)
P. Ganguly, Indian Institute of Technology/Kharagpur (India)
Rabindra Nath Chakraborty, Indian Institute of Technology/Kharagpur (India)


Published in SPIE Proceedings Vol. 3666:
International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98
Anurag Sharma; Banshi Dhar Gupta; Ajoy K. Ghatak, Editor(s)

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