Search Results - Shangjian Zhang

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  1. 1
    Optimized Single-Shot Photonic Time-Stretch Digitizer Using Complementary Parallel Single-Sideband Modulation Architecture and Digital Signal Processing

    Optimized Single-Shot Photonic Time-Stretch Digitizer Using Complementary Parallel Single-Sideband Modulation Architecture and Digital Signal Processing by Di Peng, Zhiyao Zhang, Yangxue Ma, Yali Zhang, Shangjian Zhang, Yong Liu

    Published 2017-01-01

    A novel single-shot photonic time-stretch digitizer scheme is proposed based on complementary parallel single-sideband modulation architecture. Successive digital signal processing, including linearization operation and phase compensation, is employed to improve the performance. Both theoretical ana...

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  2. 2
    Frequency-Sweep-Range-Reconfigurable Complementary Linearly Chirped Microwave Waveform Pair Generation by Using a Fourier Domain Mode Locking Optoelectronic Oscillator Based on Stimulated Brillouin Scattering

    Frequency-Sweep-Range-Reconfigurable Complementary Linearly Chirped Microwave Waveform Pair Generation by Using a Fourier Domain Mode Locking Optoelectronic Oscillator Based on Sti... by Lingjie Zhang, Zhen Zeng, Yaowen Zhang, Zhiyao Zhang, Shangjian Zhang, Guangming Ni, Yong Liu

    Published 2020-01-01

    A Fourier domain mode locking (FDML) optoelectronic oscillator (OEO) based on stimulated Brillouin scattering (SBS) is proposed to generate complementary linearly chirped microwave waveform (LCMW) pairs with flexibly-reconfigurable frequency sweep range and excellent frequency sweep linearity. The F...

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  3. 3
    Microwave Photonic Harmonic Down-Conversion Based on Cascaded Four-Wave Mixing in a Semiconductor Optical Amplifier

    Microwave Photonic Harmonic Down-Conversion Based on Cascaded Four-Wave Mixing in a Semiconductor Optical Amplifier by Xinhai Zou, Shangjian Zhang, Heng Wang, Zhiyao Zhang, Jinjin Li, Yali Zhang, Shuang Liu, Yong Liu

    Published 2018-01-01

    A reconfigurable and wideband photonic method is proposed for microwave photonic harmonic down-conversion based on cascaded four-wave mixing in a semiconductor optical amplifier (SOA). The cascaded four-wave mixing in SOA triggers high-order harmonics generation of local oscillator (LO) in the optic...

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  4. 4
    Wideband and High-Resolution Measurement of Magnitude-Frequency Response for Optical Filters Based on Fixed-Low-Frequency Heterodyne Detection

    Wideband and High-Resolution Measurement of Magnitude-Frequency Response for Optical Filters Based on Fixed-Low-Frequency Heterodyne Detection by Xinhai Zou, Shangjian Zhang, Heng Wang, Zhiyao Zhang, Jinjin Li, Yali Zhang, Shuang Liu, Yong Liu

    Published 2017-01-01

    A high-resolution electrical method is proposed for magnitude-frequency response measurement of optical filters based on fixed-low-frequency heterodyne detection. The method consists of an acousto-optic frequency shifter and two phase modulators located in a Mach–Zehnder interferometer ar...

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  5. 5
    Freely Tunable Dual-Passband Microwave Photonic Filter Based on Phase-to-Intensity Modulation Conversion by Stimulated Brillouin Scattering

    Freely Tunable Dual-Passband Microwave Photonic Filter Based on Phase-to-Intensity Modulation Conversion by Stimulated Brillouin Scattering by Zhen Zeng, Zhiyao Zhang, Zhengkai Li, Jun Yuan, Shangjian Zhang, Yali Zhang, Zhengping Zhang, Yong Liu

    Published 2019-01-01

    An approach to achieving a highly selective and stable microwave photonic filter (MPF) with two passbands independently tunable is presented. The dual-passband MPF is realized based on phase-to-intensity modulation conversion by stimulated Brillouin scattering. In the proposed scheme, a freely tunab...

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  6. 6
    Photonics-Assisted Bandwidth-Doubling Dual-Chirp Microwave Signal Generation With Freely-Tunable Central Frequency

    Photonics-Assisted Bandwidth-Doubling Dual-Chirp Microwave Signal Generation With Freely-Tunable Central Frequency by Lingjie Zhang, Zhen Zeng, Yaowen Zhang, Zhiyao Zhang, Bao Sun, Shangjian Zhang, Yali Zhang, Yong Liu

    Published 2020-01-01

    A photonics-assisted dual-chirp microwave signal generation scheme is proposed based on electro-optic modulation and heterodyne detection. The dual-chirp microwave signal is generated by heterodyne beating between a dual-chirp optical waveform and a frequency-shifted optical carrier, where the dual-...

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  7. 7
    Optically Tunable Microwave Frequency Downconversion Based on an Optoelectronic Oscillator Employing a Phase-Shifted Fiber Bragg Grating

    Optically Tunable Microwave Frequency Downconversion Based on an Optoelectronic Oscillator Employing a Phase-Shifted Fiber Bragg Grating by Yangxue Ma, Zhiyao Zhang, Jun Yuan, Zhen Zeng, Shangjian Zhang, Yali Zhang, Zhengping Zhang, Dongbing Fu, Jianan Wang, Yong Liu

    Published 2018-01-01

    We demonstrate an approach to achieve optically tunable microwave frequency downconversion based on an optoelectronic oscillator (OEO) incorporating a tunable microwave photonic filter. The wideband tunable local oscillation (LO) is generated in the OEO through simply tuning the frequency difference...

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