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Jing-yan Xie - One of the best experts on this subject based on the ideXlab platform.

  • a hybrid internet catv 5g fiber fso integrated system with a triple wavelength Polarization Multiplexing scenario
    IEEE Access, 2019
    Co-Authors: Wen-shing Tsai, Song-en Tsai, Jing-yan Xie
    Abstract:

    A hybrid Internet/cable television (CATV)/5G fiber-free-space optical (FSO) integrated system with a triple-wavelength Polarization Multiplexing scenario is attainably demonstrated for the first time. In a triple-wavelength Polarization Multiplexing scenario with vestigial sideband (VSB) four-level pulse amplitude modulation (PAM4)/CATV/16-quadrature amplitude modulation (QAM)-orthogonal frequency-division Multiplexing (OFDM) modulation, the channel capacity is considerably multiplied and the overall performance is significantly improved. With a tunable optical band-pass filter, Polarization-tracking free de-Multiplexing is attained by removing other wavelengths with different Polarizations, and the optical VSB PAM4/CATV/16-QAM-OFDM signal is created by partially reducing the optical signal's linewidth. Compared with established Polarization Multiplexing fiber-FSO integrations with complex Polarization de-Multiplexing mechanism, it demonstrates a notable one with the benefits of simplicity and flexibility. Sufficiently low bit error rate, acceptable PAM4 eye diagrams, clear constellation map, and high composite second-order/composite triple beat values are attained through a 40 km single-mode fiber transport with 200 m free-space link. This demonstrated triple-wavelength Polarization Multiplexing fiber-FSO integrated system is promising because it not only incorporates fiber backhaul with optical wireless feeder, but it also simplifies system's structure and enhance system's overall performance.

  • A Hybrid Internet/CATV/5G Fiber-FSO Integrated System With a Triple-Wavelength Polarization Multiplexing Scenario
    IEEE Access, 2019
    Co-Authors: Wen-shing Tsai, Song-en Tsai, Jing-yan Xie
    Abstract:

    A hybrid Internet/cable television (CATV)/5G fiber-free-space optical (FSO) integrated system with a triple-wavelength Polarization Multiplexing scenario is attainably demonstrated for the first time. In a triple-wavelength Polarization Multiplexing scenario with vestigial sideband (VSB) four-level pulse amplitude modulation (PAM4)/CATV/16-quadrature amplitude modulation (QAM)-orthogonal frequency-division Multiplexing (OFDM) modulation, the channel capacity is considerably multiplied and the overall performance is significantly improved. With a tunable optical band-pass filter, Polarization-tracking free de-Multiplexing is attained by removing other wavelengths with different Polarizations, and the optical VSB PAM4/CATV/16-QAM-OFDM signal is created by partially reducing the optical signal's linewidth. Compared with established Polarization Multiplexing fiber-FSO integrations with complex Polarization de-Multiplexing mechanism, it demonstrates a notable one with the benefits of simplicity and flexibility. Sufficiently low bit error rate, acceptable PAM4 eye diagrams, clear constellation map, and high composite second-order/composite triple beat values are attained through a 40 km single-mode fiber transport with 200 m free-space link. This demonstrated triple-wavelength Polarization Multiplexing fiber-FSO integrated system is promising because it not only incorporates fiber backhaul with optical wireless feeder, but it also simplifies system's structure and enhance system's overall performance.

Jianping Yao - One of the best experts on this subject based on the ideXlab platform.

  • wavelength reuse in a symmetrical radio over wdm pon based on Polarization Multiplexing and coherent detection
    Journal of Lightwave Technology, 2016
    Co-Authors: Xiang Chen, Jianping Yao
    Abstract:

    A symmetrical radio over a colorless wavelength-division Multiplexing passive optical network with wavelength reuse based on Polarization Multiplexing and coherent detection incorporating digital phase noise cancellation is proposed and experimentally demonstrated. For the downlink, two optical signals are intensity modulated by two different 16-QAM downstream microwave vector signals that are Polarization multiplexed at the optical line terminal (OLT). Then, the two orthogonally polarized optical signals are transmitted to the optical network unit (ONU). At the ONU, one of the two orthogonally polarized optical signals is selected to be reused for the uplink transmission. Then, the reused optical signal is split into two channels by a 3-dB coupler. One portion of the reused optical signal is phase modulated by a 16-QAM upstream microwave vector signal, while the other portion is intensity modulated by another 16-QAM upstream microwave vector signal. Again, the two portions of the optical signals are Polarization multiplexed and transmitted back to the OLT. At the OLT, a coherent receiver with a digital signal processing (DSP) unit is used to detect the upstream optical signals. Two DSP algorithms are developed to recover the two 16-QAM upstream microwave vector signals. The transmission of two 2.5-Gb/s 16-QAM downstream microwave vector signals and two 2.5-Gb/s 16-QAM upstream microwave vector signals over a 10.5-km single-mode fiber is experimentally demonstrated. The error vector magnitudes for both the down and upstream transmissions are measured to be 7.3% and 8.65%, which are good enough to achieve error-free transmission with forward error correction.

  • wavelength reuse in a uwb over wdm pon based on injection locking of a fabry perot laser diode and Polarization Multiplexing
    Journal of Lightwave Technology, 2014
    Co-Authors: Wentao Cui, Tong Shao, Jianping Yao
    Abstract:

    Wavelength reuse in a symmetric ultra-wideband (UWB) over wavelength-division-Multiplexing passive optical network based on injection locking of a Fabry-Perot laser diode (FP-LD) and Polarization Multiplexing is proposed and experimentally demonstrated. In the proposed scheme, the downstream UWB signal and baseband signal are generated and Polarization multiplexed in the central station and sent to a base station (BS) over an optical fiber. At the BS, one of the downstream signals is selected to injection lock the FP-LD. It is demonstrated theoretically and experimentally that the upstream service performance is less sensitive to the modulation depth of the downstream UWB signal than the baseband signal, and the use of the downstream UWB signal as the injection signal would contribute to a better transmission performance for both the downstream and upstream services. Thus, the downstream UWB signal is selected as the injection signal. An experiment is performed. When the FP-LD is injection locked by a downstream UWB signal, a clear optical carrier is generated which is reused for upstream UWB and baseband transmission. A bidirectional point-to-point transmission of 1.25 Gb/s UWB signal and 10 Gb/s baseband signal over 25-km single-mode fiber using a single wavelength is demonstrated. The bit error rate performances and the eye diagrams for both downstream and upstream transmissions are measured.

Wen-shing Tsai - One of the best experts on this subject based on the ideXlab platform.

  • a hybrid internet catv 5g fiber fso integrated system with a triple wavelength Polarization Multiplexing scenario
    IEEE Access, 2019
    Co-Authors: Wen-shing Tsai, Song-en Tsai, Jing-yan Xie
    Abstract:

    A hybrid Internet/cable television (CATV)/5G fiber-free-space optical (FSO) integrated system with a triple-wavelength Polarization Multiplexing scenario is attainably demonstrated for the first time. In a triple-wavelength Polarization Multiplexing scenario with vestigial sideband (VSB) four-level pulse amplitude modulation (PAM4)/CATV/16-quadrature amplitude modulation (QAM)-orthogonal frequency-division Multiplexing (OFDM) modulation, the channel capacity is considerably multiplied and the overall performance is significantly improved. With a tunable optical band-pass filter, Polarization-tracking free de-Multiplexing is attained by removing other wavelengths with different Polarizations, and the optical VSB PAM4/CATV/16-QAM-OFDM signal is created by partially reducing the optical signal's linewidth. Compared with established Polarization Multiplexing fiber-FSO integrations with complex Polarization de-Multiplexing mechanism, it demonstrates a notable one with the benefits of simplicity and flexibility. Sufficiently low bit error rate, acceptable PAM4 eye diagrams, clear constellation map, and high composite second-order/composite triple beat values are attained through a 40 km single-mode fiber transport with 200 m free-space link. This demonstrated triple-wavelength Polarization Multiplexing fiber-FSO integrated system is promising because it not only incorporates fiber backhaul with optical wireless feeder, but it also simplifies system's structure and enhance system's overall performance.

  • A Hybrid Internet/CATV/5G Fiber-FSO Integrated System With a Triple-Wavelength Polarization Multiplexing Scenario
    IEEE Access, 2019
    Co-Authors: Wen-shing Tsai, Song-en Tsai, Jing-yan Xie
    Abstract:

    A hybrid Internet/cable television (CATV)/5G fiber-free-space optical (FSO) integrated system with a triple-wavelength Polarization Multiplexing scenario is attainably demonstrated for the first time. In a triple-wavelength Polarization Multiplexing scenario with vestigial sideband (VSB) four-level pulse amplitude modulation (PAM4)/CATV/16-quadrature amplitude modulation (QAM)-orthogonal frequency-division Multiplexing (OFDM) modulation, the channel capacity is considerably multiplied and the overall performance is significantly improved. With a tunable optical band-pass filter, Polarization-tracking free de-Multiplexing is attained by removing other wavelengths with different Polarizations, and the optical VSB PAM4/CATV/16-QAM-OFDM signal is created by partially reducing the optical signal's linewidth. Compared with established Polarization Multiplexing fiber-FSO integrations with complex Polarization de-Multiplexing mechanism, it demonstrates a notable one with the benefits of simplicity and flexibility. Sufficiently low bit error rate, acceptable PAM4 eye diagrams, clear constellation map, and high composite second-order/composite triple beat values are attained through a 40 km single-mode fiber transport with 200 m free-space link. This demonstrated triple-wavelength Polarization Multiplexing fiber-FSO integrated system is promising because it not only incorporates fiber backhaul with optical wireless feeder, but it also simplifies system's structure and enhance system's overall performance.

Gee-kung Chang - One of the best experts on this subject based on the ideXlab platform.

Shilong Pan - One of the best experts on this subject based on the ideXlab platform.

  • dual band lfm signal generation by optical frequency quadrupling and Polarization Multiplexing
    IEEE Photonics Technology Letters, 2017
    Co-Authors: Qingshui Guo, Fangzheng Zhang, Pei Zhou, Shilong Pan
    Abstract:

    A photonic approach to generating dual-band linear frequency modulation (LFM) signal is proposed based on optical frequency quadrupling and Polarization Multiplexing. This is achieved by using an integrated Polarization Multiplexing dual-parallel Mach-Zehnder modulator to perform frequency quadrupling in two orthogonal Polarizations independently. After optical-to-electrical conversion, two LFM signals in different frequency bands can be generated simultaneously. The proposed scheme has a very simple and compact structure. Thanks to the frequency quadrupling technique, high-frequency, and wideband LFM signals can be generated with low speed electrical devices. The central frequency, bandwidth, and temporal duration of the generated LFM signals can be easily adjusted. In the experiment, the generation of dual-band LFM signals in K-band and Ka-band (centered at 20 and 30 GHz, respectively) is demonstrated. Tunability of the central frequency, bandwidth, and time duration is also verified. The proposed signal generator is a promising candidate in dual-band multi-function radar applications.

  • full duty triangular pulse generation based on a Polarization Multiplexing dual drive mach zehnder modulator
    Optics Express, 2016
    Co-Authors: Wenjuan Chen, Dan Zhu, Zhiwen Chen, Shilong Pan
    Abstract:

    A simple and flexible photonic approach to generating a triangular microwave waveform using a single integrated Polarization-Multiplexing dual-drive Mach-Zehnder modulator (PM-DMZM) and a polarizer is proposed and demonstrated, which needs no specific large modulation indices or an optical filter. In the proposed method, one sub-Mach-Zehnder modulator (MZM) in the PM-DMZM is driven by a fundamental frequency, which generates an optical signal composed of an optical carrier and a + 1st-order sideband along one Polarization direction; and the other sub-MZM is driven by a frequency tripled signal, generating an optical carrier and a -1st-order sideband along the orthogonal Polarization direction. By adjusting the Polarization direction of the polarizer following the PM-DMZM, which changes the power ratio of the two sidebands, optical intensity with expression corresponding to the Fourier expansion of a triangular-shaped waveform is obtained. Different from the previously reported approaches, neither specific large modulation index nor optical filtering is required, which guarantees a large operational frequency range and improved robustness. A proof-of-concept experiment is carried out. 5-GHz triangular-shaped waveform signals are successfully generated with different modulation indices.

  • multi octave linearized analog photonic link based on a Polarization Multiplexing dual parallel mach zehnder modulator
    Optics Express, 2016
    Co-Authors: Dan Zhu, Jian Chen, Shilong Pan
    Abstract:

    A multi-octave highly-linear analog photonic link with simultaneous suppression of second-order intermodulation distortion (IMD2) and third-order intermodulation distortion (IMD3) is proposed and demonstrated based on a single integrated Polarization-Multiplexing dual-parallel Mach-Zehnder modulator (PM-DPMZM). The IMD2 is eliminated by biasing one sub-MZM in each sub-DPMZM at a point close to the maximum transmission point and the other sub-MZM at a point close to the minimum transmission point. The obtained fundamental frequency terms are in phase while the second-order harmonics are complementary when the two outputs of the two sub-MZMs are photodetected. The IMD3 is suppressed by adjusting the RF powers introduced to the two sub-DPMZMs, producing two complementary IMD3 terms when the modulated signals are photodetected. An experiment is carried out. Simultaneous suppression of IMD2 and IMD3 is achieved. The second-order spurious-free dynamic range (SFDR2) and third-order spurious-free dynamic range (SFDR3) are 82 dB·Hz1/2 and 110 dB·Hz2/3, respectively, indicating an improvement of 12 dB in SFDR2 and 13 dB in SFDR3 as compared with the low-biased MZM based analog photonic link, or an improvement of 3 dB in SFDR2 and 16 dB in SFDR3 as compared with the quadrature-biased MZM based photonic link.

  • Two-bit Photonic Digital-to-Analog Conversion Unit based on Polarization Multiplexing
    Asia Communications and Photonics Conference 2015, 2015
    Co-Authors: Fangzheng Zhang, Bingdong Gao, Shilong Pan
    Abstract:

    A 2-bit photonic digital-to-analog conversion unit is proposed and experimentally demonstrated based on Polarization Multiplexing. It can be used to construct higher resolution DACs and the complexity is expected to be reduced by half.

  • coupled frequency doubling optoelectronic oscillator based on Polarization modulation and Polarization Multiplexing
    Optics Communications, 2012
    Co-Authors: Shilong Pan, Pei Zhou, Shuhong Cai, Dan Zhu, Zhenzhou Tang, Xiangfei Chen
    Abstract:

    Abstract A coupled frequency-doubling optoelectronic oscillator (OEO) is proposed and experimentally demonstrated, which is constructed based on the perfect combination of Polarization modulation and Polarization Multiplexing. A fundamental microwave signal at 9.95 GHz or a frequency-doubled microwave signal at 19.9 GHz is generated with a wavelength-independent sidemode-suppression ratio (SMSR) as high as 78 dB obtained. The phase noise of the generated 19.9-GHz signal is − 103.45 dBc/Hz at 10-kHz frequency offset, indicating a good short-term stability. The proposed scheme is simple and flexible, which can find applications in radars and wireless communications.