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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 彭隆瀚(Lung-Han Peng) | |
dc.contributor.author | Chi-Min Ho | en |
dc.contributor.author | 侯濟民 | zh_TW |
dc.date.accessioned | 2021-06-16T23:24:51Z | - |
dc.date.available | 2017-08-03 | |
dc.date.copyright | 2012-08-03 | |
dc.date.issued | 2012 | |
dc.date.submitted | 2012-07-31 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/65095 | - |
dc.description.abstract | 本論文利用準相位匹配理論進行非線性光學中頻率轉換之研究,我們在0.75mm厚的鉭酸鋰(Lithium tantalite, LiTaO3, LT)基板,利用高電壓極化反轉的技術,製作出準相位匹配非線性轉換週期性極化反轉鉭酸鋰 (PPLT)非線性轉換光參晶體,置入光參振盪器中,產生高效率的藍光與白光雷射。
筆者利用級聯光參-多週期倍頻振盪結構,製作出波長可調式藍光晶體,再利用此結構使用變跡方法設計出寬頻高效率的藍光晶體,斜線效率約18%、頻寬1.83nm,且其波長頻寬變化平滑無明顯峰值之藍光465nm光源,這對於散斑的抑制有良好的效果。 接著本論文研究綠光光源的改良,筆者設計多週期變跡綠光倍頻結構,藉由寬頻寬的泵浦光源產生寬頻寬的綠光雷射。在實驗上,筆者成功製作出轉換效率約在10%,且波長頻寬大於5nm的綠光光源,此種綠光雷射光源將可降低散斑對比至5%左右。 最後利用藍光結構級聯光參紅光晶體,成功製作出寬頻高效率的白光光源,與先前相比,在使用新添購的NL204雷射且將光束光腰拓寬至300um(wo)後,在1W的泵浦綠光入射下,產生約200mW的白光輸出,其中藍光56mW、紅光83.03mW、綠光60.97mW,色度座標為(0.3141,0.3194,0.3665)、色溫為6489K、整體效率達20%,而藍光與紅光頻寬分別為1.2nm與1.12nm。 | zh_TW |
dc.description.abstract | This thesis focuses on quasi-phase matching (QPM) frequency con-ver¬sion using periodically poled lithium tantalite (PPLT). It is composed of two parts: (1) Design and characterization of cascaded optical parametric oscillation (OPO) with second harmonic generation (SHG), and (2) the integration of optical structure of cascade OPO-SHG blue and OPO-red lasers to make blue light and white light laser.
First of all, multi-periodicity SHG cascading OPO is used to generate blue light laser with a wavelength of 465nm. Then with the help of apodizing, the phase delay can be reduced and thus the conversion efficiency and the generated blue linewidth can be improved to 18% and about 1.83nm, respectively. Second, in order to improve green laser source with speckle reduction, multi-periodicity SHG with apodizing structure in green laser crystal is used. By using a broadband inferred pump made by an OPO process, the SHG green light conversion efficiency can reach about 10% and the linewidth of the green light can be expanded up to 5nm, which reduces the speckle contrast to less than 5%. Finally, based on QPM PPLT, a 200mW white light laser source is fabricated when pumped by a 1W pulsed green laser. At an average green pump of 1W, 56mW and 83.03mW power for blue and red light were obtained. The total power is of 200mW white light with chromaticity coordinates (0.3141,0.3194,0.3665) and color temperature of 6489 K. The high conversion efficiency 20% was ascribed to the extended spectral line¬width of the blue and red bandwidth, exceeding 1nm. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T23:24:51Z (GMT). No. of bitstreams: 1 ntu-101-R99941035-1.pdf: 6941908 bytes, checksum: 7325074beee785415a56b44577d4c136 (MD5) Previous issue date: 2012 | en |
dc.description.tableofcontents | 第一章 緒論 1
1.1 研究背景與動機 1 1.2 常用非線性晶體介紹 7 1.3 鉭酸鋰晶體介紹 9 1.3.1 鉭酸鋰歷史簡介 9 1.3.2 鉭酸鋰的相變化模型 10 1.4 週期性區域反轉之製作方式 12 第二章 非線性光學-頻率轉換理論 13 2.1 非線性頻率轉換的波動與耦合方程式 13 2.2 二倍頻產生 17 2.2.1 平面波近似 17 2.2.2 高斯波近似 23 2.2.3 可接受波長頻寬與溫度頻寬 28 2.3 雙折射相位匹配理論 31 2.4 準相位匹配理論 35 2.5 光學參量振盪器 39 2.5.1 傳統光參產生及準相位匹配光參產生 39 2.5.2 波長可調性 43 2.5.3 光參振盪器介紹 44 第三章 準相位匹配白光雷射晶片研究 47 3.1 白光雷射晶片設計 47 3.1.1 白光雷射晶片架構簡介 47 3.1.2 倍頻晶體週期之設計 49 3.1.3 光參晶體週期設計 50 3.2 準相位匹配光參振盪藍光產生器 52 3.2.1 自倍頻光參振盪藍光產生器晶體設計 52 3.2.2 級聯光參振盪-倍頻產生藍光產生器晶體設計 55 3.2.3 級聯光參-多週期倍頻振盪藍光產生器模擬與分析 57 3.3 準相位匹配光參振盪紅光產生器 62 3.3.1 紅光光參週期設計 62 3.4 變跡準相位多週期寬頻綠光產生器 63 3.4.1 變跡準相位多週期寬頻綠光設計 63 第四章 光學量測與分析 65 4.1 光學測量之前置作業 65 4.1.1 晶體研磨和拋光 65 4.1.2 溫控系統製作 68 4.1.3 共振腔設計與模態匹配 70 4.2 級聯光參-自倍頻與多週期變跡倍頻振盪藍光雷射之量測與分析 73 4.2.1 級聯光參自倍頻藍光實驗目的 73 4.2.2 級聯光參自倍頻藍光實驗架構 73 4.2.3 級聯光參自倍頻藍光實驗結果與分析 75 4.2.4 級聯光參多週期變跡倍頻雷射實驗目的 77 4.2.5 級聯光參多週期變跡倍頻雷射實驗結果與分析 78 4.3 光參振盪紅光雷射之量測與分析 85 4.3.1 實驗目的 85 4.3.2 實驗結果與分析 85 4.4 光參振盪白光雷射之量測與分析 87 4.4.1 實驗架構 87 4.4.2 實驗結果與分析 89 4.5 多週期變跡倍頻綠光晶體 95 4.5.1 實驗目的 95 4.5.2 實驗架構 97 4.5.3 實驗結果與分析 97 第五章 結論與未來展望 101 5.1 結論 101 5.2 未來展望 102 5.2.1 未來研究方向 102 參考文獻 104 | |
dc.language.iso | zh-TW | |
dc.title | 準相位匹配寬頻白光雷射之研究 | zh_TW |
dc.title | Study of Quasi-Phase-Matching Periodically Poled
Lithium Tantalate for Broadband White Light Laser | en |
dc.type | Thesis | |
dc.date.schoolyear | 100-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 王維新(Way-Seen Wang),孔慶昌(Andy Kung),賴志明(Chih Ming, Lai) | |
dc.subject.keyword | 準相位,白光,雷射,非線性,跡變,寬頻,多週期, | zh_TW |
dc.subject.keyword | QPM,white light,laser,nonlinear optics,apodization,broadband,multi-periodicity, | en |
dc.relation.page | 106 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2012-08-01 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
顯示於系所單位: | 光電工程學研究所 |
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