非週期性晶疇極化反轉鈮酸鋰作為雙波長電光布拉格雷射Q調制器之研究

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姓名

黃尚昇(Shang-Sheng Huang) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

非週期性晶疇極化反轉鈮酸鋰作為雙波長電光布拉格雷射Q調制器之研究
(Aperiodically Poled Lithium Niobate as Electro-Optical Bragg Q-switch in Dual Wavelength Laser)

相關論文

★ Continuous-wave narrow-line yellow laser generation in a diode-pumped Nd:YVO4 laser using volume Bragg gratings	★ 半導體雷射泵浦內建式Q-調制Nd:MgO:PPLN雷射之研究
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★ 高效率雙Nd:YVO4 雷射和頻黃光產生系統	★ 以串級式電光週期性晶格極化反轉鈮酸鋰達成三波長主動式Q-調制Nd:YVO4雷射
★ 以單塊二維週期性晶格極化反轉鈮酸鋰同時作為Nd:YVO4雷射之電光Q調制器和腔內光參量振盪器	★ 綠光準相位匹配二倍頻質子交換鎂摻雜鈮酸鋰波導的製程研究
★ 以單晶片串級式週期性準相位匹配波長轉換器與非週期性準相位匹配電光偏振模態轉換器達成主動式調制窄頻輸出光參量振盪器之研究	★ 單片非週期性晶疇極化反轉鈮酸鋰同時作為Nd:YVO4雷射Q-調制和腔內光參量產生之研究
★ 準相位匹配二倍頻軟質子交換鎂摻雜鈮酸鋰波導研究	★ 以雙體積全像布拉格光柵及二維週期性晶疇極化反轉鈮酸鋰於Nd:YVO4雷射內達成脈衝式窄頻光參量振盪器之研究

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摘要(中)

橘黃光脈衝雷射，可應用天文觀測和醫療領域。在實驗上利用非週期性晶疇極化反轉鈮酸鋰同時Q調制1064nm雷射和1342nm雷射並利用BiBO晶體和頻產生橘黃光脈衝雷射。以模擬退火法演算法，計算可滿足1064nm和1342nm雷射繞射條件的非週期性結構。入射光的光束大小、非週期性結構的面積…等，皆會影響繞射效率。然而，非週期性晶疇極化反轉鈮酸鋰在結構中的模態耦合方程式複雜，尚未有理論發表，因此先以實驗作為佐證
在考量入射光束大小為300μm的情況下，本實驗元件設計長度均為3cm，但寬度不同，分別為920μm和560μm。寬度960μm的設計，結構涵蓋入射光與繞射光；而寬度560μm的設計只考量入射光。兩種結構經反傅立葉分析過後，其空間頻率所對應到的傅立葉係數，幾乎相等。我們在寬度960μm的元件，入射光入射元件中間位置時，量測到最佳的繞射效率。將此元件，做為在Nd:YVO4雷射系統下，雙波長雷射Q調制並利用BIBO和頻產生橘黃光脈衝雷射。在共振腔優化最佳程度下，吸收泵浦為5.8W，達成橘黃光脈衝雷射輸出。脈衝寬度9ns，尖端峰值功率270W。

摘要(英)

Yellow-orange pulsed lasers are required for astronomic observation and medical applications. We have succeed design and manufacture aperiodically poled lithium niobate(APPLN) as EO Bragg Q switching in Nd:YVO4 dual wavelength sum frequency generate Orange-Yellow pulse laser.
In this letter, we design APPLN by aperiodic optical superlattice technique and simulated annealing method. Beam spot size of incident light, aperiodically structure area and other reason effect diffraction efficiency. However, the coupled mode theory in APPLN is complicated, so the theory haven’t been publish.
The beam spot size of the incident light is about 300μm, we design two device. The first device which width is 920μm design for incident light and diffraction light, and the second device which width is 560μm design for incident light only. Both length is 3cm and thickness is 500μm.
We can measure different diffraction efficiency with different incident light position. When the incident light input the device’s middle position of the width dimension, we get the highest diffraction efficiency at the first device. Then we put the first device into laser cavity. Under the optimum cavity-length condition, the highest Orange-Yellow pulse laser peak power is 270W, pulse width is 9ns, obtained at 5.8W of absorption pump power.

關鍵字(中)

★ 非週期性晶疇極化反轉鈮酸鋰

關鍵字(英)

★ APPLN

論文目次

中文摘要…………………………………………………… i
英文摘要…………………………………………………… ii
致謝………………………………………………………… iii
目錄………………………………………………………… iv
圖目錄……………………………………………………… vi
表目錄……………………………………………………… x
第一章緒論…………………………………………………1
1-1 歷史回顧…………………………………………1
1-2 鈮酸鋰晶體………………………………………2
1-3硼酸鹽鉍BiBO…………………………………7
1-4雷射增益介質……………………………………9
1-5研究動機………………………………………12
1-6內容概要………………………………………19
第二章理論…………………………………………………20
2-1鈮酸鋰晶體之電光效應………………………20
2-2 電光布拉格繞射元件…………………………23
2-3 連續波雷射……………………………………28
2-4 Q調制……………………………………………30

2-5 相位匹配………………………………………35
2-6 和頻……………………………………………40
第三章元件設計與製作……………………………………45
3-1模擬退火法……………………………………45
3-2 將模擬退火法運用於非週期性晶疇極化反轉結
構……………………………………………48
3-3元件設計………………………………………50
3-4元件製作………………………………………54
第四章實驗與結果…………………………………………62
4-1 繞射效率量測………………………………62
4-2 和頻593nm脈衝雷射量測結果………………72
第五章結論與未來展望……………………………………76
5-1結論…………………………………………76
5-2未來展望……………………………………76
第六章參考文獻…………………………………………77

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指導教授

陳彥宏(Yen-Hung Chen)

審核日期

2014-8-15

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