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Polarization dependence of stimulated Brillouin scattering-based switchable microwave photonic filter

Gu Jun, Wang Fei, Lu Youxi, Peng Mengmeng, Shi Lun, Kang Wen, Huang Jingxin

Optica Applicata

2019

Vol. 49, nr 1

5--11

We propose and experimentally demonstrate a switchable microwave photonic filter based on polarization dependence of stimulated Brillouin scattering (SBS). The continuous optical wave from a tunable laser source is split into two branches. One branch serves as the SBS pump source and another branch serves as the signal source which are interactional to generate the SBS effect in the dispersion-shifted fiber. Only by adjusting the polarization direction of pump light and signal light, a frequency response switched between bandpass and notch filtering shape can be obtained.