基于腔內泵浦技術的雙波長和頻482.5nm藍光連續(xù)激光器的研究
發(fā)布時間：2018-09-08 17:11
【摘要】：藍光激光具有相對較為廣泛的應用前景,但是目前能夠實現(xiàn)在激光輻射的藍光波段十分有限。針對藍光激光領域的困難與難題,本論文針對此問題提出一種可行的方案:LD泵浦增益介質Nd:YLF輻射出908nm準三能級激光在諧振腔內振蕩,并且在振蕩的過程中有一部分的腔內激光能量被增益介質Yb:YAG吸收并同時輻射出1030nm四能級激光,雙波長激光同時在諧振腔內振蕩。這樣,就產生了908nm準三能級激光和1030nm四能級激光在各自的諧振腔內同時穩(wěn)定振蕩,在兩種波長激光的交疊處放置非線性和頻晶體LBO,能夠得到穩(wěn)定的和頻激光482.5nm藍光激光的連續(xù)輸出。本論文將非線性和頻理論應用到雙波長激光器的理論模型上,推導出泵浦雙波長腔內和頻連續(xù)藍光激光器的速率方程,其次介紹了激光晶體--Nd:YLF晶體、Yb:YAG晶體,非線性和頻晶體--LBO晶體,光學諧振腔--V型諧振腔,并針對以上光學晶體以及光學諧振腔的優(yōu)缺點、物理化學特性以及穩(wěn)定性進行了分析研究,通過數(shù)值計算給出了雙波長激光和頻時相應的相位匹配角以及I類相位匹配允許的走離角曲線等;最后利用MATLAB進行數(shù)值仿真,計算了在不同條件下的482.5nm藍光激光輸出特性。本論文的研究結果為腔內泵浦雙波長和頻482.5nm藍光連續(xù)激光器的下一步研究奠定了良好的理論基礎。
[Abstract]:Blue laser has a relatively wide application prospect, but it can be realized in the blue band of laser radiation very limited. In view of the difficulties and difficulties in the field of blue laser, a feasible scheme is proposed in this paper, in which the 908nm quasi-three-level laser oscillates in the resonator by pumping the gain medium Nd:YLF with a gain of 1: LD. A part of the laser energy in the cavity is absorbed by the gain medium Yb:YAG and the 1030nm four-level laser is radiated simultaneously. The two-wavelength laser oscillates simultaneously in the resonator. In this way, the 908nm quasi-three-level laser and the 1030nm four-level laser oscillate at the same time in their respective resonators. The continuous output of a stable sum-frequency laser 482.5nm blue laser can be obtained by placing a nonlinear sum-frequency crystal LBO, at the intersection of two wavelength lasers. In this paper, the nonlinear sum-frequency theory is applied to the theoretical model of dual-wavelength laser, and the rate equation of pumped double-wavelength intracavity sum-frequency CW blue laser is derived. Secondly, the ND: YLF crystal is introduced, and the Yb: YAG crystal is introduced. The nonlinear sum-frequency crystal LBO crystal, the optical resonator -V resonator, and the advantages and disadvantages, physical and chemical properties and stability of the above optical crystals and optical resonators are analyzed and studied. The phase matching angle and the allowable walkaway angle curve of class I phase matching are given by numerical calculation. Finally, the output characteristics of 482.5nm blue laser under different conditions are calculated by numerical simulation with MATLAB. The results of this paper lay a good theoretical foundation for the further study of intracavity pumped dual-wavelength and frequency-coupled 482.5nm blue CW lasers.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN248
本文編號：2231158
[Abstract]:Blue laser has a relatively wide application prospect, but it can be realized in the blue band of laser radiation very limited. In view of the difficulties and difficulties in the field of blue laser, a feasible scheme is proposed in this paper, in which the 908nm quasi-three-level laser oscillates in the resonator by pumping the gain medium Nd:YLF with a gain of 1: LD. A part of the laser energy in the cavity is absorbed by the gain medium Yb:YAG and the 1030nm four-level laser is radiated simultaneously. The two-wavelength laser oscillates simultaneously in the resonator. In this way, the 908nm quasi-three-level laser and the 1030nm four-level laser oscillate at the same time in their respective resonators. The continuous output of a stable sum-frequency laser 482.5nm blue laser can be obtained by placing a nonlinear sum-frequency crystal LBO, at the intersection of two wavelength lasers. In this paper, the nonlinear sum-frequency theory is applied to the theoretical model of dual-wavelength laser, and the rate equation of pumped double-wavelength intracavity sum-frequency CW blue laser is derived. Secondly, the ND: YLF crystal is introduced, and the Yb: YAG crystal is introduced. The nonlinear sum-frequency crystal LBO crystal, the optical resonator -V resonator, and the advantages and disadvantages, physical and chemical properties and stability of the above optical crystals and optical resonators are analyzed and studied. The phase matching angle and the allowable walkaway angle curve of class I phase matching are given by numerical calculation. Finally, the output characteristics of 482.5nm blue laser under different conditions are calculated by numerical simulation with MATLAB. The results of this paper lay a good theoretical foundation for the further study of intracavity pumped dual-wavelength and frequency-coupled 482.5nm blue CW lasers.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN248
【參考文獻】
相關期刊論文 前1條
1 石靖波;張凱;馬毅;王衛(wèi)民;彭躍峰;魯燕華;;LBO晶體和頻產生589 nm激光的數(shù)值模擬及實驗研究[J];強激光與粒子束;2006年09期
，本文編號：2231158
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