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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/47237

    Title: 新世代光纖載微波系統與技術之整合研究---子計畫三:高功率毫米波 (W和 D頻段)白光光電發射器之研發與其在電波天文、通訊、和生醫影像系統應用;The Development of High-Power White-Light Millimeter-Wave (W and D Bands) Photonic Transmitter and Its Application to Radio-Astronomy, Communication, and Bio-Medical Imagine System
    Authors: 許晉瑋;闕志鴻;孫啟光
    Contributors: 電機工程學系
    Keywords: 光電發射器;射頻光纖;高速光偵測器;高速可調式掃頻雷射;毫米波天線;Photonic Transmitter;Radio-over-Fiber;High-Speed Photodiode;Fast-Scanning Tunable Laser;Fiber-mode-locked laser Millimeter-wave antenna;光電工程;電信工程;醫學工程
    Date: 2010-08-01
    Issue Date: 2011-07-14 10:14:50 (UTC+8)
    Publisher: 行政院國家科學委員會
    Abstract: 計畫英文摘要: 高功率毫米波寬頻(白光)信號的產生在下列的應用有非常重要的應用:高解析度頻率調制雷達,毫米波生醫影像系統,跳頻通信系統,和電波天文望遠鏡的校準。然而,傳統的固態微波信號源,其產生寬頻毫米波白光的掃描頻率卻只能達到1GHz/ms 的水準。這種掃頻速率是無法實現高解析度的即時毫米波影像。除此之外,這種掃頻的固態信號源,也需要一個非常高電壓輸出的驅動電路。若我們使用光電的技術來產生高速掃頻的毫米波白光信號,這將會非常有潛力突破掃頻速度的極限。這是因為毫米波信號只佔光波頻率的一小部分,而且借由低損耗的光纖,我們可以將這些毫米波白光信號分配到不同的待測物,例如說:電波天文望遠鏡陣列。在這個計畫,我們將會展示W (75-110GHz)和D 頻段 (110-170GHz) 的毫米波白光光電發射器。再利用此新穎的元件和高速掃頻雷射或是高重複速率次皮秒的鎖模雷射,我們也會展示3dB 頻寬大於35GHz (>75-110GHz) 和掃描速率大於35GHz/ms 且平均功率 >0dBm 的毫米波白光。 我們也會展示此白光源在跳頻通信系統,電波天文望遠鏡,和即時生醫影像系統的應用。 The generation of high-power millimeter-wave (MMW) with a broad frequency range (white-light) and very-fast scanning rate attracts lots of attention for several applications, such as; high resolution frequency modulated continuous wave (FMCW) radar, THz (MMW) bio-medical imaging system, frequency-hopping spread spectrum (FHSS) communication system, and for the characterization of MMW radio telescope. However, the traditional MMW solid-state source usually exhibits a frequency scanning rate less than 1GHz/ms, which is usually too low to obtain a high resolution real-time image. In addition, a high-voltage output driver circuit is necessary to switch the tunable oscillator. By use of photonic technique to generate the fast-sweeping MWW signal is an attractive choice to overcome the limitation in sweeping-speed of traditional solid-state MMW source due to that the MMW band only occupies an extremely small portion of center frequency of optical wavelength. Furthermore, by use of the low-loss optical fibers, we can distribute the MMW white-light signal to different instrument-under-test, such as for the calibration of radio telescope array. In this project, we will demonstrate the MMW (W (75-110GHz) and D (110-170GHz) bands) white-light photonic generator and transmitter by use of a fast scanning laser or a high-repetition rate sub-ps mode-locked laser and a high-power/broadband near-ballistic uni-traveling carrier photodiode (NBUTC-PD) based photonic emitter to generate a MMW white-light spectrum cover W-bands and W+D bands with a 3dB bandwidth over 35GHz, (75-110GHz and 75-170GHz) with a scanning rate over 35GHz/ms and averaged power over 0dBm. We will demonstrate its application to FHSS radio-over-fiber (RoF) communication system, radio-telescope system, and real-time bio-medical imaging system. 研究期間:9908 ~ 10007
    Relation: 財團法人國家實驗研究院科技政策研究與資訊中心
    Appears in Collections:[電機工程學系] 研究計畫

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