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論文名稱 Title |
小型高功率藍光固態雷射之研製 The Study and Implementation of Diode-laser-pumped High-power Blue Solid-state Laser |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
95 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2002-07-05 |
繳交日期 Date of Submission |
2002-07-09 |
關鍵字 Keywords |
藍光雷射 blue laser |
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統計 Statistics |
本論文已被瀏覽 5702 次,被下載 5961 次 The thesis/dissertation has been browsed 5702 times, has been downloaded 5961 times. |
中文摘要 |
近年來藍/綠光雷射在微機械加工、雷射顯示器、水下探測、高密度光儲存器及醫學診斷…等之應用發展日受重視,因此各種藍/綠光雷射技術皆被深入研究;其中半導體雷射激發之固態雷射,配合腔內倍頻技術以產生藍光及綠光雷射,是目前生命期最長且功率最高的方式。 由於綠光雷射在物理機制上為四能階雷射,而藍光雷射屬於準三能階雷射系統,使得藍光雷射在技術開發上較綠光雷射來得困難,因此如何有效產生高功率藍光雷射,並大幅縮減雷射系統架構,以期能配合產業上之應用為本實驗主要目的。此外,在開發各種高功率固態雷射過程中,若能準確地預估雷射輸出特性,如輸出功率,雷射模態…等,對於整個雷射系統的開發過程,無論在效率上或是成本上皆能產生很大助益。所以本實驗另一目的是利用一套光學軟體GLAD,來模擬分析實驗室所開發之Nd:YAG四能階與準三能階雷射系統。 實驗中我們所開發的藍光雷射共振腔就長度而言僅4mm,此外藍光輸出功率目前也可達到71.7mW。在理論模擬方面,則已經成功地運用GLAD這套光學軟體初步模擬出四能階與準三能階雷射系統,且其光轉換效率約68%左右。另外,藉由光學軟體ZEMAX,我們設計出可以有效耦合laser diode array光源之聚焦系統-lens duct,且在輸出入端面無抗反射膜下,其仍具有高達80%以上之耦合效率。 |
Abstract |
Low-cost and compact blue/green lasers are desired for applications such as micromachining, laser display, underwater communications, high-density optical data storage, and medical diagnostics recently. Therefore various type of blue and green lasers have been studied, especially for intracavity frequency doubling of the diode-pumped solid-state laser, which can generate high blue/green powers with long lifetime. Unlike the green laser, which is originated from a four-level laser, the blue laser belongs to a quasi-three-level system, so it is more difficult to develop the blue laser source. The purpose of this experiment is to develop a high power and high efficiency blue laser with simple structure so that it can easily be commercialized. Furthermore, it is a very cost-effective approach to develop such solid-state lasers, if the laser output characteristics can be estimated precisely using software simulation. We used an optics software GLAD to model our four-level and quasi-three-level Nd:YAG laser systems. In experiment, we developed a blue laser system with a cavity length of 4 mm and with 71.7 mW of blue output power. Besides, we have succeeded in using GLAD to model a Nd:YAG plane-parallel laser cavity, which has an optical conversion efficiency of 68%. Finally, we designed an effective lens duct with a coupling efficiency up to 80%, even if there is no AR coating on lens duct’s input or output facets. |
目次 Table of Contents |
中文摘要…………………………………..…………………………i 英文摘要…………………………………..………………………ii 目錄………………………………………….……………………iii 圖目錄…………………………………….………………………iv 表目錄……………………………………………………………vii 第一章 緒論 ……………………………………………………..1 第二章 藍光雷射之基本理論…………..………………………4 2-1 四能階與準三能階雷射系統……….………………4 2-2 Nd:YAG與Nd:YVO4雷射晶體……………………9 2-3 藍光非線性晶體……………………….……………14 2-4 倍頻之理論分析……………………….……………16 第三章 Lens Duct及雷射系統之理論模擬……….…………26 3-1 Lens Duct之工作原理…………….………………26 3-2 Lens Duct之理論模擬與特性量測………………30 3-3 GLAD原理………………………….………………43 3-4 Nd:YAG四能階與準三能階雷射之數值分析…52 第四章 高功率Nd:YAG藍光雷射……………………………57 4-1 藍光雷射系統架構……………………….……………57 4-2 熱導管與溫控系統之工作原理…………..……………62 4-3 實驗結果與分析………………………………………65 第五章 結論 ……………………………………..…………….72 參考文獻…………………………..…….………..……………74 中英對照表………………………………………………………77 附錄1四能階平行共振腔模擬程式……………..……………80 附錄2準三能階平行共振腔模擬程式…………..……………88 |
參考文獻 References |
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