本論文透過使用矽基液晶元件為空間光調變器，進行1x12光纖交換系統之設計與研究。
在進行光纖交換系統之設計中，本論文首先使用ZEMAX光學模擬軟體進行1x12光纖交換系統架構之設計、模擬與性能優化，並分別針對單模光纖至單模光纖、單模光纖至多模光纖及多模光纖至多模光纖之不同交換架構進行探討與比較。續而依據軟體模擬結果進行1x12光纖交換系統之實現，並針對使用矽基液晶元件之光調變器進行特性量測與設計。最後透過垂直腔表面發射直調雷射上載1.25 Gbps訊號，進行1x12光交換系統之數據傳輸測試。
從量測結果得知在1x12光纖交換系統之架構中，以單模光纖至多模光纖之交換架構可以得到最佳的光纖偶合效率，而從系統損耗分析之結果得知，矽基液晶元件使用多階相位調變技術比二位元相位調變技術將能有效降低系統損耗約5~6 分貝。而從數據傳輸測試結果得知在多模光纖至多模光纖之交換架構中，若矽基液晶元件使用多階相位調變技術進行通道選擇，則每一輸出光纖所量測到的誤碼率皆遠小於10-10 。

In this research, an experimental study of 1x12 optical fiber switching system using Liquid Crystal on Silicon (LCoS) device based Spatial Light Modulator (SLM) is presented.
The design, simulation and performance optimization of a 1x12 optical fiber switching system was performed through a ZEMAX optical simulation tool. The optical fiber switching architecture based on single mode fiber to single mode fiber (SMF to SMF), single mode fiber to multimode fiber (SMF to MMF) and multimode mode fiber to multimode fiber (MMF to MMF) have investigated and compared. From the simulation design, a 1x12 optical fiber switching system was experimentally implemented. The channel selection of the implemented optical fiber switching system based on LCoS device was designed as well as its fundamental properties was also measured. A digital transmission test at a speed of 1.25Gbps was applied to evaluate the system performance.
From the measurement results, it has shown that optical fiber switching system based on SMF to MMF switching architecture has a better fiber coupling efficiency than any other two fiber switching architecture. The analysis of system light loss has also shown that LCoS device using multilevel phase modulation to perform the channel selection can reduce the system light loss of around 5~6 dB compared with using binary phase modulation. In the digital transmission test, the 1x12 optical fiber switching system was evaluated at MMF to MMF switching architecture, and according to the measured eye diagrams, the estimated bit error ratio (BER) were all less than 10-10.

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