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A Tunable Microwave Photonic Filter With a Complex Coefficient Based on Polarization Modulation

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7 Author(s)
Zhang, C. ; Center for Inf. Photonics & Commun., Southwest Jiaotong Univ., Chengdu, China ; Yan, L.-S. ; Pan, W. ; Luo, B.
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A tunable microwave photonic filter with a complex coefficient based on polarization modulation and a single laser source is proposed and demonstrated. Two out-of-phase microwave signals with orthogonal polarization states are generated using a polarization modulator and then combined into one special polarization state to introduce certain phase shifts after filtering out one sideband. The tunability of the filter with the complex coefficient is achieved by adjusting the phase shifts between two taps. In addition, the frequency response of the proposed filter from 10 to 11 GHz with FSR of 400 MHz is measured.

Frequency response of the proposed microwave photonic filter. Frequency response of the proposed microwave photonic filter.

Published in:

Photonics Journal, IEEE  (Volume:5 ,  Issue: 5 )