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  1. 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)

  2. No Access

    Article

    Passive detection of copy-paste forgery between JPEG images

    A blind digital image forensic method for detecting copy-paste forgery between JPEG images was proposed. Two copy-paste tampering scenarios were introduced at first: the tampered image was saved in an uncompre...

    **ang-hua Li **香花, Yu-qian Zhao 赵于前, Miao Liao 廖苗… in Journal of Central South University (2012)

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    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)

  4. No Access

    Article

    Automatic Solar Filament Segmentation and Characterization

    This paper presents a generic method to automatically segment and characterize solar filaments from various Hα full-disk solar images, obtained by different solar observatories, with different dynamic ranges a...

    Y. Yuan, F. Y. Shih, J. **g, H. Wang, J. Chae in Solar Physics (2011)

  5. 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)

  6. No Access

    Article

    Dual-wavelength S-band erbium-doped fiber double-ring laser

    We propose and demonstrate an S-band CW dual-wavelength erbium-doped fiber (EDF) dual-ring laser using a compound-ring filter (CRF) with various coupling losses inside the gain cavity. Employing a ring filter ...

    C. H. Yeh, F. Y. Shih, C. W. Chow, S. Chi in Laser Physics (2008)