Title :
A Tunable Microwave Photonic Filter With a Complex Coefficient Based on Polarization Modulation
Author :
Zhang, Chenghui ; Yan, L.-S. ; Pan, W. ; Luo, B. ; Zou, X.-H. ; Jiang, H.-Y. ; Lu, Bao-Liang
Author_Institution :
Center for Inf. Photonics & Commun., Southwest Jiaotong Univ., Chengdu, China
Abstract :
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.
Keywords :
frequency response; laser tuning; light polarisation; microwave filters; microwave photonics; optical filters; optical modulation; complex coefficient; frequency 10 GHz to 11 GHz; frequency response; orthogonal polarization states; out-of-phase microwave signals; phase shifts; polarization modulation; polarization modulator; single laser source; tunable microwave photonic filter; Band-pass filters; Microwave filters; Microwave photonics; Optical attenuators; Optical filters; Microwave photonic filter; complex coefficient; frequency response; polarization modulation;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2013.2274765
