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Proceedings Paper

Design and fabrication of demultiplexers for DWDM applications
Author(s): D. K. Gautam; Chitrarekha Chaudhari; L. S. Patil
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Paper Abstract

The principle of operation and the design techniques for various types of the optical demultiplexers are reviewed. The results for two-channel optical demultiplexer based on optical directional coupler configuration are presented. The device for separating two wavelengths with 4 nm spacing is designed on the Silicon substrate in SiO2/SiO2-TiO2/SiO2 rib waveguide. The rib waveguide design techniques using the effective index method are described. The propagation of the two wavelengths through the device is calculated using the computer tools based on the beam propagation method (bpm). The dependence of the device length required for separation of the two wavelengths on the rib waveguide parameters is studied. The waveguide rib width and separation between the parallel waveguides are the parameters those affect the value of the length required for separating the two wavelengths to a greater extent. The guide thickness inside the rib also has considerable effect on the device length. The clad thickness and rib height, however, were found to be the least affecting parameters. The optimization techniques for the rib waveguide and the coupler parameters for achieving the demultiplexing with the minimum length of the device are explained. The proposed fabrication techniques for the SiO2/SiO2-TiO2/SiO2 rib waveguide are presented.

Paper Details

Date Published: 29 August 2002
PDF: 13 pages
Proc. SPIE 4905, Materials and Devices for Optical and Wireless Communications, (29 August 2002); doi: 10.1117/12.480989
Show Author Affiliations
D. K. Gautam, North Maharashtra Univ. (India)
Chitrarekha Chaudhari, Gunma Univ. (India)
L. S. Patil, North Maharashtra Univ. (India)


Published in SPIE Proceedings Vol. 4905:
Materials and Devices for Optical and Wireless Communications
Constance J. Chang-Hasnain; YuXing Xia; Kenichi Iga, Editor(s)

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