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Optical Engineering

Tunable filter with a complex coefficient based on polarization controller
Author(s): Zhihu Wei; Rong Wang; Tao Pu; Tao Fang; Guodan Sun; Jilin Zheng
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Paper Abstract

A wideband tunable filter with a complex coefficient is proposed and demonstrated. The output of a polarization modulator is filtered by the optical bandpass filter, an optical single sideband modulation will be generated. When it passes through a polarization controller and a polarizer, a complex coefficient will be achieved by tuning the angle of the polarization controller before the polarizer, and the real coefficients are controlled by the optical power of the lasers. As the real coefficients and complex coefficient can be tuned, a two-taps incoherent photonic microwave filter with a tunable range over the entire full free spectral range is realized by adjusting the polarization angle from −90  deg to 90 deg while the shape of filter remains unchanged.

Paper Details

Date Published: 3 April 2013
PDF: 5 pages
Opt. Eng. 52(4) 044002 doi: 10.1117/1.OE.52.4.044002
Published in: Optical Engineering Volume 52, Issue 4
Show Author Affiliations
Zhihu Wei, The PLA Univ. of Science and Technology (China)
Rong Wang, The PLA Univ. of Science and Technology (China)
Tao Pu, The PLA Univ. of Science and Technology (China)
Tao Fang, The PLA Univ. of Science and Technology (China)
Guodan Sun, The PLA Univ. of Science and Technology (China)
Jilin Zheng, The PLA Univ. of Science and Technology (China)


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