Theoretical Evaluation of a Pulsed Mid-Infrared Ho3+:BaY2F8 Laser

2019 IEEE 4th Optoelectronics Global Conference (OGC) Pub Date : 2019-09-01 DOI:10.1109/OGC.2019.8925174

K. Rong, H. Cai, Xiaoxu Liu, Juhong Han, Wei Zhang, G. An, Hongyuan Wang, Lei Wang, You Wang

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引用次数: 3

Abstract

In this study, we construct a theoretical model to analyze the output characteristics of a pulsed Ho³⁺:BaY2f8 (Ho³⁺:BYF) laser by taking both energy transfer up-conversion (ETU) and cross relaxation (CR) processes into account. The influences of the pump energy, pulse width, reflectance of an output coupler (OC), crystal length, and Ho³⁺ doping concentration on the physical performances are investigated in detail for an end-pumped structure. The calculation results reveal that the proper length of a Ho³⁺:BaY2f8crystal is from 5 to 10 mm for the Ho³⁺ doping concentration of 10–40 at.%. We also deduce that a high output can be obtained when the Ho³⁺ doping concentration is selected as 30 at.%. It has been demonstrated that the relaxation oscillation of a Ho:BYF laser can be observed for a pulsed pump source. We can see that the threshold peak power of a pump light source decreases with the increase of the pulse width. The conclusions might be useful for the realization of a pulsed mid-infrared Ho³⁺: BYF laser.

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脉冲中红外Ho3+:BaY2F8激光器的理论评价

在这项研究中，我们建立了一个理论模型来分析脉冲Ho3+:BaY2f8 (Ho3+:BYF)激光器的输出特性，同时考虑了能量传递上转换(ETU)和交叉弛豫(CR)过程。详细研究了泵浦能量、脉冲宽度、输出耦合器反射率、晶体长度和Ho3+掺杂浓度对端泵浦结构物理性能的影响。计算结果表明，当Ho3+掺杂浓度为10 ~ 40 at.%时，Ho3+: bay2f8晶体的合适长度为5 ~ 10 mm。我们还推断，当Ho3+掺杂浓度选择为30 at.%时，可以获得较高的输出。实验证明，在脉冲泵浦源下，可以观察到Ho:BYF激光器的弛豫振荡。我们可以看到，泵浦光源的阈值峰值功率随着脉冲宽度的增加而减小。所得结论对实现脉冲中红外Ho3+: BYF激光器具有一定的参考价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE 4th Optoelectronics Global Conference (OGC)

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