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9 Result(s)

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  1. No Access

    Article

    400 Mbit/s OOK green-LED visible light communication with low illumination

    In this work, we propose and demonstrate a LED-based visible light communication (VLC) system. Here, an analog front end (AFE) circuit with optimal equalization design is investigated to enhance the modulation...

    C. H. Yeh, C. W. Chow, C. S. Gu, B. S. Guo, Y. J. Chang… in Optical and Quantum Electronics (2018)

  2. No Access

    Article

    Use of RSOA-transmitter for OFDM colorless WDM-PON communication

    In this investigation, we propose and demonstrate a wavelength-tunable self-seeding 1.2 GHz reflective semiconductor optical amplifier (RSOA)-based transmitter in each optical network unit for colorless wavele...

    C. H. Yeh, C. W. Chow, J. Y. Sung, Y. F. Wu in Optical and Quantum Electronics (2016)

  3. No Access

    Article

    Optical filter analyses for demultiplexing all-optical OFDM transmission systems

    Using a single optical filter to demultiplex the all-optical orthogonal frequency-division multiplexing (OFDM) system was regarded as cost-effective and simple. Here, an all-optical OFDM signal demultiplexer u...

    J. Y. Sung, C. W. Hsu, H. Q. Su, C. W. Chow, C. H. Yeh in Optical and Quantum Electronics (2015)

  4. No Access

    Article

    Investigation of no analogue-equalization and blue filter for 185 Mbps phosphor-LED wireless communication

    In this demonstration, we first propose an optimal analogue front end circuit without employing pre-equalization (series peaking) to increase the modulation bandwidth of phosphor-LED in visible light communica...

    C. H. Yeh, C. W. Chow, Y. L. Liu, H. Y. Chen, Y. Liu… in Optical and Quantum Electronics (2015)

  5. No Access

    Article

    Demonstration of using multi-band 16-QAM OFDM modulation with direct-detection in 10 GHz bandwidth for 37.3-Gb/s PON

    We propose and experimentally demonstrate a 37.3 Gb/s passive optical network using four-band orthogonal-frequency-division-multiplexing (OFDM) channels within 10 GHz bandwidth. Here, the required sampling rat...

    C. H. Yeh, H. Y. Chen, C. W. Chow, J. Y. Sung in Photonic Network Communications (2014)

  6. No Access

    Article

    Utilizing 1.2 GHz bandwidth reflective semiconductor optical amplifier for 1.25–10 Gbit/s for colourless and cooler-less wavelength conversion

    In this investigation, we propose and investigate a wavelength converter by using a cost-effective and uncooled TO-can package reflective semiconductor optical amplifier with

    C. H. Yeh, C. W. Chow, Y. F. Wu, F. Y. Shih in Optical and Quantum Electronics (2013)

  7. No Access

    Article

    AC-based phosphor LED visible light communication by utilizing novel signal modulation

    We propose and demonstrate a new AC-light emitting diode based visible light communication system, in which the message signal is up-converted to 400 kHz frequency band and combine with the 60 Hz AC-power from...

    Y. F. Liu, C. H. Yeh, C. W. Chow, Y. L. Liu in Optical and Quantum Electronics (2013)

  8. No Access

    Article

    Simple digital FIR equalizer design for improving the phosphor LED modulation bandwidth in visible light communication

    We propose and demonstrate a simple digital post-equalization technique to improve the bandwidth-limitation of light-emitting-diode (LED) visible-light-communication (VLC) channel. The design of finite-impulse...

    C. H. Yeh, C. W. Chow, Y. F. Liu, P. Y. Huang in Optical and Quantum Electronics (2013)

  9. No Access

    Article

    Self-protected time-division-multiplexed passive access networks in tree and ring topology architectures

    In this investigation we propose and experimentally demonstrate the self-protected and survivable time-division-multiplexed passive optical networks (PONs) in tree and ring topology architectures against fiber...

    C. H. Yeh, C. W. Chow, Y. F. Wu, F. Y. Shih, S. Chi in Photonic Network Communications (2012)