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Browsing by Author "Huang, Han-Sheng"

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    13.75-Gb/s OFDM Signal Generation for 60-GHz RoF System within 7-GHz License-Free Band via Frequency Sextupling
    (2009)
    Shih, Po-Tsung
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    Lin, Chun-Ting
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    Huang, Han-Sheng
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    Jiang, Wen-Jr
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    Chen, Jyehong
    A 60-GHz RoF system with frequency sextupling is experimentally demonstrated. Based on modified SSB, a 13.75-Gb/s OFDM signal is generated within the 7-GHz license-free band. No penalty is observed after transmission over 25-km single-mode fiber.
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    60-GHz Photonic Vector Signal Generation Employing Frequency Quadrupling Scheme for Radio-over-Fiber Link
    (2009)
    Jiang, Wen-Jr
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    Lin, Chun-Ting
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    Huang, Han-Sheng
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    Shih, Po-Tsung
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    Chen, Jason(Jyehong)
    A novel 60-GHz photonic millimeter-wave signal generation using a frequency quadrupling technique is proposed for the first time. A 312.5-MSym/s 8-QAM millimeter-wave signal at 60 GHz is demonstrated with negligible penalty following 25-km SMF transmission. (C) 2008 Optical Society of America
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    Experimental demonstration of a novel filterless frequency quadrupling technique for colorless WDM millimeter-wave up-conversion systems
    (2009)
    Jiang, Wen-Jr
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    Lin, Chun-Ting
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    Huang, Han-Sheng
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    Shih, Po-Tsung
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    Chen, Jason (Jyehong)
    This study demonstrates a novel filterless frequency quadrupling technique for optical millimeter-wave generation and WDM up-conversion. After transmission of 50-km SMFF, the sensitivity penalty of each channel is less than 1.5 dB. (C)2008 Optical Society of America
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    Optical Millimeter-Wave Signal Generation Via Frequency 12-Tupling
    (2010-01-01)
    Shih, Po-Tsung
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    Chen, Jason (Jyehong)
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    Lin, Chun-Ting
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    Jiang, Wen-Jr
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    Huang, Han-Sheng
    This work demonstrates the feasibility of optical millimeter-wave signal generation using frequency 12-tupling. Optical millimeter-wave signal with two sixth-order optical sidebands are generated using frequency quadrupling optical millimeter-wave generation along with optical four-wave-mixing. 210- and 120-GHz two-tone optical signals with optical carrier and undesired harmonic distortion suppression ratios of 20 and 30 dB are experimentally demonstrated. The proposed system provides an attractive method for millimeter-wave applications such as optical up-conversion in radio-over-fiber (RoF) communication systems at millimeter-wave band, phase-array antennas, optical sensors, radars, and tera-hertz applications.
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    Transmission of 20-Gb/s OFDM signals occupying 7-GHz license-free band at 60 GHz using a RoF system employing frequency sextupling optical up-conversion
    (2010-06-07)
    Shih, Po-Tsung
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    Lin, Chun-Ting
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    Jiang, Wen-Jr
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    Huang, Han-Sheng
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    Chen, Jyehong
    This work describes a proposed 60-GHz radio-over-fiber (RoF) system employing a frequency sextupling optical up-conversion scheme. Based on the modified single sideband modulation scheme, spectrally efficient vector signals were transmitted with no performance degradation due to dispersion-induced fading. Wavelength-division-multiplexed optical up-conversion can be realized using the proposed system. Since the required transmitter bandwidth is significantly reduced, radio-frequency components with lower bandwidth and higher reliability can be utilized. Both 13.75-Gb/s QPSK-OFDM and 20.625-Gb/s 8QAM-OFDM signals were experimentally demonstrated. After transmission over 25-km of standard single mode fiber, no significant received power penalty was observed. (C) 2010 Optical Society of America
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    W-band 3.75-Gb/s 8PSK Wireless Signal Generation and Transmission via Optical Frequency Octupling and Bias Modulation of NBUTC-PD with Feed-Forward Equalizer
    (2009)
    Shih, Po-Tsung
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    Lin, Chun-Ting
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    Huang, Han-Sheng
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    Jiang, Wen-Jr
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    Hsu, Dar-Zu
    Generation and transmission of a wireless W-band 8PSK signal with 3.75-Gb/s data rate are experimentally demonstrated. The W-band carrier is generated from millimeter-wave generation with frequency octupling. Bias modulation of a NBUTC-PD is also utilized.
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    WDM up-conversion employing frequency quadrupling in optical modulator
    (2009-02-02)
    Shih, Po-Tsung
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    Lin, Chun-Ting
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    Jiang, Wen-Jr
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    Chen, Jason (Jyehong)
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    Huang, Han-Sheng
    This work presents an optical up-conversion system with frequency quadrupling for wavelength-division-multiplexing (WDM) communication systems using a dual-parallel Mach-Zehnder modulator without optical filtering. Four-channel 1.25-Gb/s wired fiber-to-the-x (FTTx) and wireless radio-over-fiber (RoF) signals are generated and transmitted simultaneously. Moreover, the decline in receiver sensitivities due to Mach-Zehnder modulator bias drifts is also investigated. Receiver power penalties of the 20-GHz up-converted WDM signals and baseband (BB) FTTx signals are less than 1 dB when bias deviation voltage is less the 20% of the half-wave voltage. After transmission over a 50-km SSMF, the receiver power penalties of both the BB and 20-GHz RF OOK signals are less than 1 dB. Notably, 60-GHz optical up-conversion can be achieved using 15-GHz radio frequency (RF) components and equipment. (C) 2009 Optical Society of America