A compact complex-coefficient microwave photonic filter with continuous tunability

Jinwang Qian; Zhennan Zheng; Mingzheng Lei; Chunqi Song; Shanguo Huang; Xinlu Gao

doi:doi:10.3788/COL201917.100601

Chinese Optics Letters, 2019, 17 (10): 100601, Published Online: Aug. 29, 2019

A compact complex-coefficient microwave photonic filter with continuous tunability Download： 695次

Jinwang Qian Zhennan Zheng Mingzheng Lei Chunqi Song Shanguo Huang ^*Xinlu Gao ^**

Author Affiliations

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

Figures & Tables

Fig. 1. (a) Proposed tunable MPF. LD, laser diode; VNA, vector network analyzer; DP-QPSK modulator, dual-polarization quadrature phase shift keying modulator; HC, hybrid coupler; OBPF, optical band-pass filter; TDGDE, tunable differential group delay element; PD, photodetector; 90° PR, 90° polarization rotator. (b) The detailed structure of the QPSK modulator. MZM, Mach–Zehnder modulator.

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Fig. 2. (a) Measured optical spectra of the CS-DSB and $CS - DSB + OC$ signal. (b) Measured optical spectra before and after the OBPF, as well as the transfer function of the OBPF.

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Fig. 3. (a) Phase shift of the recovered RF signal over the frequency range of 10–32 GHz. (b) Relative power variation for different phase shifts.

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Fig. 4. Measured (a) phase shift and (b) relative power variation of the RF signal at the frequency of 20 GHz over the sweeping time of 200 s.

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Fig. 5. Measured frequency responses of the proposed MPF (a) with different bias voltages of X3 and (b) at different times with the same bias voltages.

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Fig. 6. Measured notch positions of the proposed filter with different bias voltages.

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Jinwang Qian, Zhennan Zheng, Mingzheng Lei, Chunqi Song, Shanguo Huang, Xinlu Gao. A compact complex-coefficient microwave photonic filter with continuous tunability[J]. Chinese Optics Letters, 2019, 17(10): 100601.

A compact complex-coefficient microwave photonic filter with continuous tunability Download： 695次

Fig. 2. (a) Measured optical spectra of the CS-DSB and $CS - DSB + OC$ signal. (b) Measured optical spectra before and after the OBPF, as well as the transfer function of the OBPF.

Fig. 3. (a) Phase shift of the recovered RF signal over the frequency range of 10–32 GHz. (b) Relative power variation for different phase shifts.

Fig. 4. Measured (a) phase shift and (b) relative power variation of the RF signal at the frequency of 20 GHz over the sweeping time of 200 s.

Fig. 5. Measured frequency responses of the proposed MPF (a) with different bias voltages of X3 and (b) at different times with the same bias voltages.

Fig. 6. Measured notch positions of the proposed filter with different bias voltages.

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A compact complex-coefficient microwave photonic filter with continuous tunability Download： 695次

Fig. 2. (a) Measured optical spectra of the CS-DSB and CS−DSB+OC signal. (b) Measured optical spectra before and after the OBPF, as well as the transfer function of the OBPF.

Fig. 3. (a) Phase shift of the recovered RF signal over the frequency range of 10–32 GHz. (b) Relative power variation for different phase shifts.

Fig. 4. Measured (a) phase shift and (b) relative power variation of the RF signal at the frequency of 20 GHz over the sweeping time of 200 s.

Fig. 5. Measured frequency responses of the proposed MPF (a) with different bias voltages of X3 and (b) at different times with the same bias voltages.

Fig. 6. Measured notch positions of the proposed filter with different bias voltages.

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Fig. 2. (a) Measured optical spectra of the CS-DSB and $CS - DSB + OC$ signal. (b) Measured optical spectra before and after the OBPF, as well as the transfer function of the OBPF.