3 April 2013 Tunable filter with a complex coefficient based on polarization controller
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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.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhihu Wei, Zhihu Wei, Rong Wang, Rong Wang, Tao Pu, Tao Pu, Tao Fang, Tao Fang, Guodan Sun, Guodan Sun, Jilin Zheng, Jilin Zheng, } "Tunable filter with a complex coefficient based on polarization controller," Optical Engineering 52(4), 044002 (3 April 2013). https://doi.org/10.1117/1.OE.52.4.044002 . Submission:
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