本論文研究L band環型光纖雷射之感測系統，感測參數主要為溫度、應力應變以及震動，藉由光纖光柵受到外在環境影響所產生的波長飄移特性作為系統之感測元件。首先介紹研究動機並探討過去的文獻，其次介紹光纖感測相關技術與論述布拉格光纖光柵、長週期光纖光柵以及使用之碳纖維複合材料的原理與特性，並簡介光纖被動元件之特性。接下來將研製雙級L band摻鉺光纖放大器，在第一級利用3m的摻鉺光纖，第二級利用4m的摻鉺纖且兩級的泵激光功率皆為150mW時，得到3.16dBm的輸出功率，接著利用此摻鉺光纖放大器建置L band環型摻鉺光纖雷射，其動態量測範圍可達30公里，並以此環型摻鉺光纖雷射結合光纖光柵組成水溫、應力應變與震動三種感測系統，模擬距離6公里時其感測情形，溫度感測範圍25°C -50°C，波長總飄移量為0.98nm，線性度R2約為0.9997;應力應變感測將可移動平台移動0.1mm，光纖光柵受拉力之波長總飄移量為1.6nm，受壓力之總波長飄移量為1.6nm;震動感測時，當使用40g法碼且震動的角度變化量為15°-45°時，波長變化42pm至250pm。
其次利用半導體光放大器為光源，建置雷射輸出波長位在L band的環型半導體光放大器光纖雷射，其動態量測範圍達到10公里時，因損耗過大而無法產生雷射。接著以環型摻鉺光纖雷射的光纖光柵作為感測端進行水溫、應力應變的感測實驗，溫度感測範圍25°C -50°C，波長總飄移量為0.96nm，線性度R2約為0.9997;應力應變感測將可移動平台移動0.1mm，光纖光柵受拉伸力之波長總飄移量為1.6nm，受擠壓力之總波長飄移量為1.5nm。

In this thesis, we propose L-band EDFA and fiber lasers for fiber-optic sensing. The fiber lasers include erbium-doped fiber laser (EDFL) and the fiber ring laser using a semi-conductor optical amplifier .The important parameters such as temperature, tension/squeeze and earthquake vibration were measured and analyzed by using light source. In the beginning, we introduce the development of fiber-optic sensing technologies, the mechanism of Fiber Bragg Gratings (FBG), and theories of both erbium-doped fiber amplifier (EDFA) and EDFL. We structure the two-stage L-band EDFA, and we found that the result of (3m+4m) EDFs is in the output power of 3.16 dBm.
Secondly, the dynamic range is more than 30 km when the EDFL is sued as sensing light source for temperature, strain and earthquake vibration. The temperature we measured ranging from 25℃ to 50℃ is corresponding to the wavelength shift of 0.98nm and the linearly R2 is 0.9997. The sensitivities for strain and stress are 0.16nm/0.01mm and 0.16nm/0.01mm, respectively. The wavelength drift is 42 pm to 250 pm by using the 40g weight when the earthquake vibration angle ranges from 15°to 45°for a simple pendulum.
The measurement of dynamic range is more than 6 km when a semiconductor optical amplifier based on fiber laser is sued as sensing light source. The temperature we measured ranging from 25℃to 50℃ is corresponding to the wavelength shift of 0.96nm and the linearly R2 is 0.9997. The sensitivities for tension and squeeze are 0.16nm/0.01mm and 0.15nm/0.01mm, respectively.

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