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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. Article

    Open Access

    A 4-Week Model of House Dust Mite (HDM) Induced Allergic Airways Inflammation with Airway Remodeling

    Animal models of allergic airways inflammation are useful tools in studying the pathogenesis of asthma and potential therapeutic interventions. The different allergic airways inflammation models available to d...

    L. N. Woo, W. Y. Guo, X. Wang, A. Young, S. Salehi, A. Hin, Y. Zhang… in Scientific Reports (2018)

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  3. 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)

  4. 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)

  5. 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)

  6. 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)

  7. 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)

  8. 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)

  9. 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)

  10. No Access

    Article

    Semiconductor optical amplifier-based laser with 25 km long cavity length utilizing sagnac fiber ring structure

    In the investigation, we propose and demonstrate a Sagnac ring based fiber laser structure using a semiconductor optical amplifier (SOA) to act as a gain medium with short to long fiber cavity lengths for wave...

    C. H. Yeh, C. W. Chow in Laser Physics (2012)

  11. No Access

    Article

    Ultra-broadband amplified spontaneous emission source by using heterogeneous optical amplifier

    In this work, we propose and experimentally investigate an ultra-broadband amplified spontaneous emission (ASE) light source with 113.8 nm bandwidth (1446.2 to 1560.0 nm) by using a cascaded two-stage optical ...

    C. H. Yeh, C. W. Chow, J. H. Chen, S. S. Lu in Laser Physics (2012)

  12. No Access

    Article

    Dual-reflected-structure erbium-doped fiber laser in single-longitudinal-mode for wavelength-tuning

    In this work, we propose and demonstrate a dual-reflected-structure erbium-doped fiber (EDF) laser with a linear cavity using a passive saturable-absorbor-based (SAB) filter to achieve single-longitudinal-mode...

    C. H. Yeh, C. W. Chow, J. Y. Sung, S. S. Lu, Y. F. Wu in Laser Physics (2012)

  13. 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)

  14. No Access

    Article

    Stable wavelength-tuning laser in single-frequency by optical-injected Fabry-Perot laser diode and RSOA for long fiber distance propagation

    In this demonstration, we propose and experimentally investigate a stable wavelength-tuning laser configuration by using self-seeded Fabry-Perot laser diode (FP-LD) and external-injected reflective semi-conduc...

    C. H. Yeh, C. W. Chow, Y. F. Wu, S. S. Lu, Y. H. Lin in Laser Physics (2012)

  15. No Access

    Article

    Simple erbium-doped dual-ring fiber laser configuration for stable and tunable dual-wavelength output

    We propose and experimentally investigate a stable and tunable dual-wavelength erbium-doped fiber (EDF) dual-ring laser scheme. Here, two tunable bandpass filters (TBFs) are used inside the dual-ring gain cavi...

    C. H. Yeh, C. W. Chow, B. C. Cheng, J. H. Chen, K. H. Chen in Laser Physics (2011)

  16. No Access

    Article

    Gender differences in reduced substance P (SP) in children with slow-transit constipation

    Adult slow-transit constipation (STC) occurs predominantly in females and is associated with low numbers of substance P (SP)-containing nerves in colonic circular muscle.

    Yee Ian Yik, Pamela J. Farmer, Sebastian K. King… in Pediatric Surgery International (2011)

  17. No Access

    Article

    Employing dual-saturable-absorber-based filter for stable and tunable erbium-doped fiber ring laser in single-frequency

    In this demonstration, a stable and wavelength-tunable erbium-doped fiber (EDF) ring laser using dual-saturable-absorber-based (DSAB) filter inside loop cavity is proposed and experimentally investigated. The ...

    C. -H. Yeh, C. -W. Chow, K. -H. Chen, J. -H. Chen in Laser Physics (2011)

  18. No Access

    Article

    Employing external injection-locked Fabry-Perot laser scheme for mm-wave generation

    We propose and experimentally investigate a 170 GHz band millimeter-wave source employing an external dual-mode-locked Fabry-Perot laser diode (FP-LD) with a 1.38 nm mode-spacing. Two continuous-wave (CW) ligh...

    Y. F. Wu, C. H. Yeh, C. W. Chow, F. Y. Shih, S. Chi in Laser Physics (2011)

  19. No Access

    Article

    Using dual-mode self-locked semiconductor laser for optical millimeter-wave application

    In this study, an optical millimeter-wave (mm-wave) generator is proposed and experimentally demonstrated by using a self-injected Fabry-Perot laser diode (FP-LD), having mode spacing of 1.11 nm, for dual-mode...

    C. -H. Yeh, C. -W. Chow, Y. -F. Liu, C. -L. Pan in Laser Physics (2011)

  20. No Access

    Article

    Wavelength-selection erbium fiber laser with single-mode operation using simple ring design

    In this demonstration, we propose and experimentally investigate a wavelength-selection erbium-doped fiber (EDF) laser in single-longitudinal-mode (SLM) by using simple fiber ring scheme design. We use a tunab...

    C. -H. Yeh, C. -W. Chow, Y. -C. Chang in Laser Physics (2010)

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