可調多頻訊號調變模組於微波光纖通訊系統之研究

近年來由於行動通訊裝置的發達及快速成長，無線通訊已成為人們生活中不可或缺的一部分，再者，隨著傳輸量的日益增加，因此傳輸系統逐漸走向更高頻的微波或是毫米波頻段，利用微波光纖通訊系統來傳輸毫米波訊號，可達成低損耗傳輸，藉此拉長毫米波訊號的距離。本論文的主旨在開發可調多頻訊號調變模組於微波光纖通訊系統，包括研究同時以強度調變器、極化調變器和相位調變器之組合為基礎產生四倍頻與倍頻模組，以3.75GHz全光升頻，將頻率升至7.5GHz與15GHz的1.25Gbps之微波訊號，分別於25公里與60公里的單模光纖傳輸中，微波光纖通訊的品質符合規範，且此系統中完全不需使用光學濾波器，大大降低了系統成本與達成靈活性之特性，研究成果將滿足未來微波光纖通訊的需求。

關鍵字

強度調變器；極化調變器；多頻訊號；微波光纖；長距離被動光網路

並列摘要

In recent years, mobile telecommunication device have received huge attention and fast growth. The wireless communication has become more important in our life, making the high demand for the high-speed transmission. Therefore, transmission system has become more high frequency, like the microwave and the millimeter-wave. Transmitting millimeter-wave signal with radio-over-fiber system can be low loss and extend the transmission distance. In this dissertation, we experimentally demonstrated a tunable multiband signal modulation module for radio-over-fiber system, including generating frequency quadrupling and frequency multiplication at the same time with intensity modulator, polarization modulator and phase modulator. Using the microwave signal with 1.25 Gbps elevated the frequency from 3.75 GHz to 7.5 GHz and 15 GHz based on the microwave frequency quadrupling module. The qualities of radio-over-fiber communication can be achieved after transmitting 25 and 60 kilometer single-mode-fiber. The system has no optical filter to reduce costs and increase flexibility. The results of the research will be sufficient to meet the standard of future radio-over fiber communication systems.

並列關鍵字

Intensity modulator ； polarization modulator ； multiband signal ； radio-over-fiber ； long reach passive optical network

參考文獻

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國際替代計量

可調多頻訊號調變模組於微波光纖通訊系統之研究

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