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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/16087
標題: | 相位跡變匹配鈮酸鋰寬頻綠光晶體之研製與其應用於改善光斑效應 Study of Apodized Quasi-Phase-Matching Lithium Nio-bate Broadband Green Laser and Its Application for Speckle Reduction |
作者: | Shih-Hao Fu 傅世豪 |
指導教授: | 彭隆瀚 |
關鍵字: | 非線性光學,準相位匹配,鈮酸鋰晶體, nonlinear optics,Quasi-Phase-Matching,Lithium Niobate, |
出版年 : | 2012 |
學位: | 碩士 |
摘要: | 本論文主要以非線性晶體鈮酸鋰材料,藉由在晶體中研製出週期性極化反轉結構,產生一光柵動量,使1064nm紅外光因準相位匹配而倍頻輸出綠光。
吾人以高壓致極化反轉之方法,於0.5mm厚鈮酸鋰上完成變跡區段啁啾結構。憑藉本實驗室0.5mm厚鈮酸鋰之穩定製程,改良其步驟,以反向製程在厚度0.75mm厚鈮酸鋰上研製出一維週期性極化反轉結構。光學量測上,於0.5mm厚鈮酸鋰變跡區段啁啾結構進行倍頻實驗,測得溫度頻寬ΔT=60°C,轉換效率37%,及綠光頻寬5nm,轉換效率12%。 This thesis is on the fabrication of periodically poled structure on congruent lithium niobate(CLN) for converting 1064nm infrared laser into a 532nm green laser by using the quasi-phase-matched second-harmonic-generation (QPM-SHG) technique. The apodized segment of chirped grating in a 0.5mm thick congruent lithium niobate was fabricated by forward electric poling method. Backward electric poling process was applied to make an one dimension periodically poled structure on a 0.75mm thick CLN. The SHG characteristics for an apodized-segment-chirped 0.5mm congruent lithium niobate shows an acceptance temperature bandwidth of 60°C with a conversion efficiency of 37% and an acceptance frequency bandwidth of 5nm with a conversion efficiency of 12%. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/16087 |
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顯示於系所單位: | 光電工程學研究所 |
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