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姓名	楊松霖(Sung-Lin Yang)  查詢紙本館藏	畢業系所	光電科學與工程學系
論文名稱	以週期性晶疇極化反轉鈦擴散鈮酸鋰波導晶片作為偏振可調定向耦合器之研究 (Electro-Optically Switched Directional Couplers with Polarization-Mode Control in Periodically Poled Ti:LiNbO3 Waveguides)
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 ★ 主動式多通道窄頻寬通Ti:PPLN波導濾波及模態轉換器之研究 ★ 以鎂掺雜鈮酸鋰製作二倍頻藍光雷射波導元件之製程研究 ★ 非週期性晶格極化反轉鈮酸鋰作為主動式窄頻寬通多波長濾波器及倍頻多波長濾波器 ★ 非週期性晶格極化反轉鈮酸鋰作為有效率的二倍頻和模態轉換器之研究 ★ 積體式週期與非週期極性反轉鈮酸鋰光電與雷射元件 ★ 退火式質子交換波導PPLN電光調制TM模態轉輻射偏振態之研究 ★ 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)	本研究成功地利用鈮酸鋰晶體極化方向可被反轉的特性，將電控偏振可調的功能與電控定向耦合器以較簡單的電極設計整合於單一鈦擴散鈮酸鋰波導晶片上；其傳播損耗在波長1550nm下，可量測得到α_TM =0.166dB/cm、α_TE =1.65dB/cm。在波導間距為4.5μm、耦合區總長度為6mm、在六段交疊反轉式 的設計下，施加Z方向電壓200V時，將原始單段電極無法切換的耦合器成功達成切換功能；並展示出在元件結構誤差時，多段電極設計可能會使工作電壓降低，元件可以繼續運作，但若是設計不良時將會使得工作電壓上升很多。 施加Y方向電場70V後，在45(_^o)C、元件長度6mm、濾波中心波長1555nm可進行偏振模態的轉換，最大轉換效率>99%，濾波頻寬約為5nm，其溫度對頻譜調變率為：dT⁄dλ=-0.8 nm⁄oC 。未來可將本研究中週期性極化反轉結構改成光參量震盪器(OPO)結構或超晶格結構(AOS)等其他積體元件以產生可調光源輸出，搭配其多樣化的功能發展強大且吸引人的主動式元件。
摘要(英)	We have designed, fabricated, and demonstrated a unique integrated PPLN switched directional couplers and polarization mode converters in Ti:LiNbO3 waveguides. A completely crossover coupling was obtained from such a device with a six-domain-inversion coupling section of 6mm long and a waveguide spacing of 4.5 μm when an external voltage of 200 V was applied along the crystal z axis. A completely crossover coupling can also be observed with other samples with single-domain and other multiple-domain-inversion configurations. We found in general, a device with higher number of domain inversions in the coupling section will have a less constraint on the coupling length for a completely crossover coupling and can perform more times of crossover couplings with EO tuning. We also successfully demonstrated the unique capability of this PPLN Ti:LiNbO3 waveguide device where the polarization mode and the directional coupling can be EO switched simultaneously or separately to increase its device functionality and applicability.
關鍵字(中)	★ 鈮酸鋰 ★ 鈦擴散波導 ★ 定向耦合器 ★ 偏振控制器	關鍵字(英)	★ PPLN EO PMC ★ Directional Coupler ★ Poling ★ waveguide
論文目次	目錄 摘要……………………………………………………………i 致謝…………………………………………………………iii 目錄…………………………………………………………iv 圖目 …………………………………………………………vi 表目…………………………………………………………ix 第一章 緒論 …………………………………………1 1.1 積體光學簡介……………………………………1 1.2 研究動機…………………………………………1 1.3 內容概要…………………………………………4 第二章 鈦離子擴散波導定向耦合器模型 2.1 波導模態橫向行為之基本分析…………………5 2.2 定向耦合器及耦合方程式………………………7 2.3 鈦擴散式模態分析與耦合長度計算……………11 2.4 設計耦合區域電極………………………………16 2.5 耦合區波導分岔角度設計………………………21 第三章 電光偏振轉換元件理論背景 3.1 鈮酸鋰晶體的電光效應原理……………………23 3.2 索爾克濾波器……………………………………27 3.3 電光准相位匹配元件……………………………29 第四章 電極設計與元件製作 4.1 電極設計…………………………………………35 4.2 鈦擴散定向耦合器製程…………………………37 4.3 極化反轉製………………………………………40 4.4 電極製程…………………………………………42 第五章 實驗與量測結果 5.1 波導特性量測……………………………………44 5.2 波導定向耦合器特性量測………………………46 5.3 多段電極式耦合器耦合特性量測 5.3.1 耦合區長度為耦合長度偶數倍…………………48 5.3.2 耦合區長度為耦合長度不為整數………………49 5.3.3 不適當的多段電極設計…………………………50 5.3.4 波導總能量隨電壓下降之分析…………………53 5.4 電光波長濾波器特性量測………………………56 5.5 元件同時進行耦合與偏振轉換…………………58 第六章 結論與未來展望 6.1 結論………………………………………………61 6.2 未來展望…………………………………………61 附錄Ａ 稜鏡耦合儀與波導寬度設計……………………64 參考文獻 …………………………………………………67
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指導教授	陳彥宏	審核日期	2013-6-4
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