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研究生: 謝言均
Hsieh, Yen-Chun
論文名稱: 以被動式Q開關摻釹晶體雷射激發人眼安全波段之光學參數振盪器
Eye-safe Optical Parametric Oscillator Driven By A Passively Q-switched Nd-doped Crystal Laser
指導教授: 黃依萍
Huang, Yi-Ping
陸亭樺
Lu, Ting-Hua
學位類別: 碩士
Master
系所名稱: 物理學系
Department of Physics
論文出版年: 2018
畢業學年度: 106
語文別: 中文
論文頁數: 69
中文關鍵詞: Nd:YAG光學參數振盪器Nd:GGG光學參數振盪器被動式Q開關雷射
英文關鍵詞: Nd:YAG OPO, Nd:GGG OPO, Nd:GGG PQS Laser
DOI URL: http://doi.org/10.6345/THE.NTNU.DP.021.2018.B04
論文種類: 學術論文
相關次數: 點閱:134下載:0
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  • 使用Nd:YAG及Nd:GGG兩種晶體,以被動式Q開關雷射激發腔內光學參數振盪器分別產生波長大約1.5 μm的人眼安全雷射,在16 W的激發光源激發下,分別可以得到0.53 W與0.44 W的輸出。在我的實驗中,研究使被動式Q開關雷射有穩定輸出、探討雷射系統中不同元件對雷射波形、輸出功率、脈衝能量的影響。另外有針對光學參數振盪器系統做最佳化,並利用在光學參數振盪器系統內加入二分之一波片,使光學參數振盪器輸出功率增加44%,也發現在共振腔中加入二分之一波片,可以使satellite pulse產生的機率降低。

    Eye-safe wavelength region about 1.5 μm is obtained by intracavity optical parametric oscillators (OPO). Eye-safe optical parametric oscillator is generated by a passively Q-switched laser with Nd:YAG and Nd:GGG crystal, respectively. The maximum output powers can be obtained 0.53 W in Nd:YAG and 0.44 W in Nd:GGG OPO.In this experiment, there are studies to make the passively Q-switched lasers have a stable output power, exploring the different laser pulse train, output power and pulse energy for different components of laser system. In addition, the optical parametric oscillator system is optimized and the output of the optical parametric oscillator is increased by 44% by adding the half-wave plate to the optical parametric oscillator system. It was also found that adding the half-wave plate to the resonator can reduce the probability of the satellite pulse.

    中文摘要 2 英文摘要 3 誌謝 4 目錄 5 表目錄 7 圖目錄 8 一. 緒論 1.1 研究動機 10 1.2 論文組織 10 二. 固態雷射 2.1 固態雷射原理 11 2.2 摻釹釔鋁石榴石雷射 12 2.3 摻釹釓鎵石榴石雷射 13 三. Q-開關雷射介紹 3.1 簡介 16 3.2 Q-開關雷射的分類 17 3.3 Q-開關雷射的動作機制 17 3.4 以摻鉻釔鋁石榴石為被動式Q-開關雷射的動作機制 19 3.5 Q-開關雷射的理論模型 19 四. 光學參量振盪器 4.1 光學參量振盪器原理 25 4.2 非線性轉換 25 4.3 相位匹配 26 4.4 相位匹配分類 27 4.5 光學參量振盪器結構分類 28 4.6 非線性晶體KTP介紹 28 五. 摻釹釔鋁石榴石(Nd:YAG)連續式雷射、被動式Q開關雷射及光參量振盪器雷射實驗 32 5.1 Nd:YAG連續式雷射實驗 33 5.2 Nd:YAG被動式Q開關雷射實驗 37 5.2.1 改變Q開關初始穿透率T0對Nd:YAG被動式Q開關雷射的影響 38 5.3 Nd:YAG光參量振盪器實驗 41 5.3.1 加入二分之一波片對Nd:YAG光參量振盪器的影響 42 六. 摻釹釓鎵石榴石(Nd:GGG)連續式雷射、被動式Q開關雷射及光參量振盪器雷射實驗 46 6.1 Nd:GGG連續式雷射實驗 46 6.2 Nd:GGG被動式Q開關雷射實驗 50 6.2.1 改變Q開關初始穿透率T0對Nd:GGG被動式Q開關雷射的影響 51 6.3 Nd:GGG光參量振盪器實驗 54 6.3.1 不同前鏡曲率對Nd:GGG光學參數振盪器的影響 55 6.3.2 不同KTP長度對Nd:GGG光學參數振盪器的影響 58 6.3.3 加入二分之一波片對Nd:GGG光學參數振盪器的影響 61 七. 結論與未來工作展望 7.1 結論 67 7.2 未來工作展望 67 八. 參考文獻 68

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