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Proceedings Paper

Design of wide-passband top-flattened and side-steepened acousto-optical tunable filter
Author(s): Hong Zhang Hu; S. J. Zhang; W. Liu; F. Geng
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Paper Abstract

The acousto-optical tunable filter (AOTF) play a key role in the dense WDM systems. In this AOTF, tow parallel acoustical waveguides compose of a directorial coupler of surface acoustic wave (SAW). By using partial acoustical absorbers, we control the distribution of the acousto-optical coupling strength along the optical waveguide to appear four decaying lopes, and make the mode conversion characteristics of the filter approach to the ideal rectangular function. The calculation results show that the -1dB bandwidth of the filter is 3.9nm, the -10dB bandwidth is 5.2nm, the interval from,-DB to -1dB is only 0.63nm. So several optical wavelengths can be simultaneously filtered with only one RF frequency.

Paper Details

Date Published: 16 October 2001
PDF: 4 pages
Proc. SPIE 4603, Fiber Optics and Optoelectronics for Network Applications, (16 October 2001); doi: 10.1117/12.444531
Show Author Affiliations
Hong Zhang Hu, Tianjin Univ. (China)
S. J. Zhang, Tianjin Univ. (China)
W. Liu, Tianjin Univ. (China)
F. Geng, China Aerospace Corp. (China)

Published in SPIE Proceedings Vol. 4603:
Fiber Optics and Optoelectronics for Network Applications

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