Theoretical and experimental study on the thermally dependent transient response of the high power continuous wave Yb-doped fiber laser

Yan Mingjian; Li Siyu; Han Zhigang; Shen Hua; Zhu Rihong

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Theoretical and experimental study on the thermally dependent transient response of the high power continuous wave Yb-doped fiber laser

机译：高功率连续波YB掺杂光纤激光器热依赖性瞬态响应的理论与实验研究

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In this paper, transient thermal effects of the Yb-doped fiber and the laser diode (LD) in high power Yb-doped fiber lasers (YDFLs) are studied theoretically to analyze the transient response of the fiber laser. Based on the transient heat conduction equation, we simulated the temperature variation of the YDF and LD. It is found that the transient response of the laser is mainly affected by the thermally induced wavelength shifting of LDs. We modified the rate equations of the fiber laser according to the temperature variation of the LD. To improve the transient response speed of the fiber laser, we present three methods: (a) raising the cooling temperature, (b) increasing the length of gain fiber, and (c) using the YDF with high doping. Finally, experiments were carried out to verify the theory, and the results are in good agreement. (C) 2019 Optical Society of America

机译：在本文中，在理论上研究了高功率YB掺杂光纤激光器（YDFL）中YB掺杂光纤和激光二极管（LD）的瞬态热效应，以分析光纤激光器的瞬态响应。基于瞬态导热方程，我们模拟了YDF和LD的温度变化。发现激光的瞬态响应主要受到LDS的热诱导波长移位的影响。我们根据LD的温度变化修改了光纤激光器的速率方程。为了提高光纤激光器的瞬态响应速度，我们提出了三种方法：（a）提高冷却温度，（b）增加增益纤维的长度，和（c）使用高掺杂的YDF。最后，进行了实验以验证理论，结果非常一致。（c）2019年光学学会

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《Applied optics》 |2019年第20期|共8页
作者
Yan Mingjian; Li Siyu; Han Zhigang; Shen Hua; Zhu Rihong;
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Nanjing Univ Sci &

Technol MIIT Key Lab Adv Solid Laser Nanjing 210094 Jiangsu Peoples R China;

Nanjing Univ Sci &

Technol Sch Sci Nanjing 210094 Jiangsu Peoples R China;

Nanjing Univ Sci &

Technol MIIT Key Lab Adv Solid Laser Nanjing 210094 Jiangsu Peoples R China;

Nanjing Univ Sci &

Technol MIIT Key Lab Adv Solid Laser Nanjing 210094 Jiangsu Peoples R China;

Nanjing Univ Sci &

Technol MIIT Key Lab Adv Solid Laser Nanjing 210094 Jiangsu Peoples R China;

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Theoretical and experimental study on the thermally dependent transient response of the high power continuous wave Yb-doped fiber laser

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