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緊湊型準連續泵浦調Q Nd∶YAG激光器

Compact quasi continuous pumped Nd∶YAG Q-switched solid laser

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摘要

本文設計了一種緊湊型端面泵浦電光調Q Nd∶YAG激光器。為實現激光器整體結構緊湊, 以快軸準直后的半導體激光器疊陣(Laser Diode Arrays,LDAs)作為泵浦源。使用焦距分別為40 mm和25 mm的球面鏡和柱面鏡將泵浦光耦合至Nd∶YAG晶體內。利用Tracepro軟件模擬了晶體入射端面和出射端面的光場分布。在采用Ф6 mm×30 mm、摻雜濃度10at.%Nd∶YAG晶體作為增益介質時, 入射與出射泵浦光斑分別為5 mm(慢軸)×45 mm(快軸)和3 mm(慢軸)×6 mm(快軸), 吸收效率為83%。利用Ansys軟件模擬了在22 ℃和60 ℃條件下Nd∶YAG激光器殼體在360 s內的溫度場動態分布。實驗結果表明, 本文設計的緊湊型激光器可以實現穩定的脈沖激光輸出。在重復頻率分別為30 Hz和50 Hz條件下, 獲得了單脈沖能量為30 mJ和25 mJ的單脈沖輸出, 對應脈沖寬度分別為18 ns和16 ns, 斜效率分別為116%和1471%。實驗結果表明, 本文設計的緊湊型激光器可以實現穩定的脈沖激光輸出。

Abstract

A compact end-pumped Electro-optical Q-switched Nd∶YAG laser was designed in this paper. In order to achieve compact construction, laser diode arrays(LDAs) with collimated fast axes were used as pumping source. A spherical lens with a focal length of 40 mm and a cylinder lens with focal length of 25 mm were used as a group for the coupling lens. The LDAs′ beam profiles on the incident and exit faces were calculated using Tracepro software. The simulation results indicate that when taking a Φ6 mm×30 mm Nd∶YAG with a doping concentration of 10at.% as the gain medium, the spots on the incident and exit faces were 5 mm(slow-axis)×45 mm(fast-axis) and 3 mm(slow-axis)×6 mm(fast-axis), respectively, and the absorption pumping power was about 83%. Dynamic temperature field distributions of Nd∶YAG larer in 360 s at 22 ℃ and 60 ℃ were simulated by Ansys software. Output pulsed energy of 30 mJ and 25 mJ were achieved while the repetition frequencies were 30 Hz and 50 Hz, corresponding to a slope efficiency of 116% and 1471%. The pulse durations were 18 ns and 16 ns, respectively. The experimental results show that the designed compact laser in this paper can achieve stable pulse laser output.

Newport宣傳-MKS新實驗室計劃
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中圖分類號:TN248.1

DOI:10.3788/co.20191202.0413

所屬欄目:原創文章

基金項目:國家自然基金青年基金(No.21707010); 吉林省科技發展計劃項目(No.20180519018JH); 吉林省科技發展計劃重點項目(No.20150204068GX)

收稿日期:2018-04-27

修改稿日期:2018-05-29

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作者單位    點擊查看

劉宇乾:長春理工大學 高功率半導體激光國家重點實驗室, 吉林 長春 130022
張 賀:長春理工大學 高功率半導體激光國家重點實驗室, 吉林 長春 130022
金 亮:長春理工大學 高功率半導體激光國家重點實驗室, 吉林 長春 130022
徐英添:長春理工大學 高功率半導體激光國家重點實驗室, 吉林 長春 130022
王海珠:長春理工大學 高功率半導體激光國家重點實驗室, 吉林 長春 130022
鄒永剛:長春理工大學 高功率半導體激光國家重點實驗室, 吉林 長春 130022
馬曉輝:長春理工大學 高功率半導體激光國家重點實驗室, 吉林 長春 130022
李 巖:長春理工大學 高功率半導體激光國家重點實驗室, 吉林 長春 130022

聯系人作者:劉宇乾([email protected])

備注:LIU Yuqian (1993—), male, Yanji, Jilin, Master's Degree, received a Bachelor′s Degree from Changchun University of Science and Technology in 2016. He is mainly engaged in solid state laser research.

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引用該論文

LIU Yu-qian,ZHANG He,JIN Liang,XU Ying-tian,WANG Hai-zhu,ZOU Yong-gang,MA Xiao-hui,LI Yan. Compact quasi continuous pumped Nd∶YAG Q-switched solid laser[J]. Chinese Optics, 2019, 12(2): 413-424

劉宇乾,張 賀,金 亮,徐英添,王海珠,鄒永剛,馬曉輝,李 巖. 緊湊型準連續泵浦調Q Nd∶YAG激光器[J]. 中國光學, 2019, 12(2): 413-424

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