Thermo-optical simulation of holmium-doped fiber amplifiers for high-power applications

被引:0
作者
Reiter, Melina [1 ]
Baer, Patrick [1 ]
机构
[1] Fraunhofer Inst Laser Technol ILT, Steinbachstr 15, D-52074 Aachen, Germany
来源
OPTICS CONTINUUM | 2024年 / 3卷 / 08期
关键词
SILICA FIBER; ABSORPTION; LASERS;
D O I
10.1364/OPTCON.532149
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We present a numerical model to simulate the influence of thermal effects on the laser output power in holmium-doped fiber amplifiers. It aims to estimate heat generation and output power more precisely, especially crucial for high power operation. The thermo-optical model includes optical effects like pair-induced quenching (PIQ), which heats the fiber, and temperature-dependent parameters like the holmium cross sections. We apply the model to a holmium-doped fiber amplifier, developed by the Fraunhofer Institute for Laser Technology (ILT), in the Interreg project E-TEST. The computed laser efficiency agrees well with the experimental data. For an uncooled active fiber pumped at 1950 nm with 25 W, we compute a rise in fiber temperature of up to 78 K, which results in a temperature-induced decrease in signal power at 2095 nm of more than 14 % to approximately 6 W, compared to the signal power computed with a solely optical simulation.
引用
收藏
页码:1516 / 1527
页数:12
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