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Proceedings Paper

A tunable demultiplexer using a polymer-based holographic grating with strain gradient
Author(s): Seunghwan Chung; Taesu Kim; Seunghoon Han; Byoungho Lee
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Paper Abstract

A tunable demultiplexer based on the holographic grating (HG) using photopolymer is described. The system is based on the 1st order Born approximation of volume diffraction, optical aberration of the lens system, and mode correlation of fiber coupling. The merits of the holographic grating are that it has relatively easy fabrication process, non-uniform grating period and multiplexing are possible, and anisotropic diffraction can be exploited. And also the strain tuning method on the polymer grating for wavelength tuning is proposed. In the setup, the polymer grating is attached on the two XYZ linear stages. If one stage is fixed and the other stage moves away, the polymer grating is extended. Hence all the transmission wavelengths move to longer wavelength with grating period variation caused by the strain induced on the polymer. The objective of this method is to change the transmission wavelengths of the demultiplexer linearly or arbitrarily.

Paper Details

Date Published: 22 October 2004
PDF: 8 pages
Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); doi: 10.1117/12.559328
Show Author Affiliations
Seunghwan Chung, Seoul National Univ. (South Korea)
Taesu Kim, Seoul National Univ. (South Korea)
Seunghoon Han, Seoul National Univ. (South Korea)
Byoungho Lee, Seoul National Univ. (South Korea)

Published in SPIE Proceedings Vol. 5560:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X
Francis T. S. Yu; Ruyan Guo; Shizhuo Yin, Editor(s)

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