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高功率掺Tm3+光纤放大器热效应管理的泵浦方式优化理论研究
Theoretical Study of Pumping Method of High Power Tm3+-doped Fiber Amplifier for Thermal Effect Management
- 发光学报 2020年41卷第7期 页码：839-848
- 作者机构：
1.北京交通大学光波技术研究所 全光网络与现代通信网教育部重点实验室, 北京 100044
2.河北大学物理科学与技术学院 光信息技术创新中心, 河北 保定 071002
- 作者简介：
[ "张轲(1995-), 男, 山西运城人, 硕士研究生, 2017年于中国石油大学(华东)获得学士学位, 主要从事2 μm波段光纤激光器方面的研究。E-mail:17120162@bjtu.edu.cn" ]
[ "延凤平(1966-), 男, 山西兴县人, 博士, 教授, 1996年于北方交通大学获得博士学位, 主要从事光纤激光器、光纤传感器、光纤通信、基于太赫兹超材料等方面的研究。E-mail:fpyan@bjtu.edu.cn" ]
[ "冯亭(1986-), 男, 河北张家口人, 博士, 副教授, 2014年于北京交通大学获得博士学位, 主要从事光纤激光、光纤传感器及其应用等方面的研究。E-mail:wlxyft@hbu.edu.cn" ]
- 基金信息：国家自然科学基金(61827818);国家自然科学基金(61620106014);国家自然科学基金(61975049)
DOI：10.37188/fgxb20204107.0839
中图分类号： O437纸质出版日期：2020-7，
收稿日期：2020-5-3，
录用日期：2020-5-13
扫 描 看 全 文
张轲, 延凤平, 韩文国, 等. 高功率掺Tm3+光纤放大器热效应管理的泵浦方式优化理论研究[J]. 发光学报, 2020,41(7):839-848.
Ke ZHANG, Feng-ping YAN, Wen-guo HAN, et al. Theoretical Study of Pumping Method of High Power Tm3+-doped Fiber Amplifier for Thermal Effect Management[J]. Chinese Journal of Luminescence, 2020,41(7):839-848.
张轲, 延凤平, 韩文国, 等. 高功率掺Tm3+光纤放大器热效应管理的泵浦方式优化理论研究[J]. 发光学报, 2020,41(7):839-848. DOI： 10.37188/fgxb20204107.0839.
Ke ZHANG, Feng-ping YAN, Wen-guo HAN, et al. Theoretical Study of Pumping Method of High Power Tm3+-doped Fiber Amplifier for Thermal Effect Management[J]. Chinese Journal of Luminescence, 2020,41(7):839-848. DOI： 10.37188/fgxb20204107.0839.
摘要
基于主振荡功率放大器结构的高功率掺Tm
3+
光纤激光器是2 μm波段高功率光纤激光器的主要实现形式，掺Tm
3+
光纤放大器（Thulium-doped fiber amplifier，TDFA）热效应管理的研究对于其输出激光功率的不断提升具有重要意义。本文主要对TDFA热效应管理的泵浦方式优化方面进行理论研究，利用龙格库塔法以及牛顿迭代法求解不同泵浦方式下TDFA的稳态速率方程，并根据热传导方程，模拟掺Tm
3+
光纤（Thulium-doped fiber，TDF）温度沿径向和轴向的分布。结合遗传算法理论，研究了分段泵浦方式，经过参数优化，在功率为5 W的2 020 nm输入信号光、总功率为1 000 W的793 nm激光泵浦、TDF吸收系数为3.1 dB/m条件下，将总长度为11 m的TDF分为2.4，2，2，2，2.6 m的5段进行泵浦，得到放大信号激光输出功率为284.5 W、斜率效率为28.45%、光纤外包层边界最高温度为86.28℃且温度总体分布均匀。与传统前向泵浦、双端泵浦方式下的TDFA相比，其热效应有明显改善。
Abstract
The high-power thulium(Tm
3+
)doped fiber laser(TDFL) based on the structure of master oscillator power-amplifier is the main type of 2 μm band high-power fiber lasers. Study on thermal effect management of the thulium doped fiber amplifier(TDFA) stage means a lot to the continuously power-scaling of the TDFL. This paper mainly focuses on the theoretical research on the optimization of the pumping method of TDFA for thermal effect management. We use the Runge-Kutta method and Newton iteration method to solve the steady-state rate equation of TDFA under different pumping methods. And
on the basis of the heat conduction equation
the temperature distributions of Tm
3+
doped fiber(Thulium-doped fiber
TDF) along the radial and axial direction are simulated. Combining with the genetic algorithm theory
the segmentally pumping method is studied. Through optimizing of the relative parameters
using a 2 020 nm input signal light with a power of 5 W
a total 793 nm laser pump power of 1 000 W and a TDF with an absorption coefficient of 3.1 dB/m and a total length of 11 m which is divided into 5 segments(2.4
2
2
2
2.6 m)
we obtained an amplified signal laser with an output power of 284.5 W and a slope efficiency of 28.45%
and the maximum temperature at the outer cladding boundary of the TDF is only 86.28 ℃ with a uniform temperature distribution along the whole fiber. Compared with a TDFA using traditional forward pumping or dual-end pumping mode
the thermal effect has been significantly improved.
关键词
掺Tm3+光纤放大器热效应管理分段泵浦遗传算法
Keywords
thulium-doped fiber amplifierthermal effect managementsegmented pumpgenetic algorithm
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