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Proceedings Paper

The optimal design of ripple-free filter based on three-mirror Gires-Tournois resonator
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Paper Abstract

Optical bandpass filters with ripple-free spectral response are highly desirable for dense wavelength-division-multiplexed (DWDM) systems. We study and analyze the transmission characteristics of an optical bandpass filter, based on a three-mirror Gires-Tournois resonator (GTR) in a Michelson interferometer (MI). The three-mirror GTR (R1, R2, R3) is actually an all-pass filter with the reflectivity of the end mirror R3 being unity. In this paper, we present an analytical expression for the optimum design which has a ripple-free spectral response. The results show that flattop spectra can be obtained by suitably choosing the reflectivities R1, R2 of the two mirrors. Whereas a two-mirror GTR-based bandpass filter has only one unique optimum reflectivity, a three-mirror GTR-based filter has many sets of optimum values, making it easier to be designed to give much better performance. The effects of the reflective coefficients of the mirrors on the optical performance were also discussed.

Paper Details

Date Published: 20 December 2004
PDF: 7 pages
Proc. SPIE 5577, Photonics North 2004: Optical Components and Devices, (20 December 2004); doi: 10.1117/12.567119
Show Author Affiliations
Li Wei, Wilfrid Laurier Univ. (Canada)
Shaowen Song, Wilfrid Laurier Univ. (Canada)
John W. Y. Lit, Wilfrid Laurier Univ. (Canada)
Univ. of Ontario (Canada)

Published in SPIE Proceedings Vol. 5577:
Photonics North 2004: Optical Components and Devices
John C. Armitage; Simon Fafard; Roger A. Lessard; George A. Lampropoulos, Editor(s)

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