多级碱金属蒸气激光放大器的输出特性

发布时间：2018-01-11 19:04

本文关键词：多级碱金属蒸气激光放大器的输出特性　出处：《光学学报》2017年09期 　论文类型：期刊论文

【摘要】：在全面分析碱金属蒸气激光放大器的激光动力学与流体动力学过程的基础上,结合热效应、饱和放大效应、放大自发辐射、高能级激发与电离的影响,建立了一个相对完善的物理模型来模拟流动散热条件下半导体抽运碱金属蒸气激光放大器的输出特性。计算模拟了纵向和横向两种不同流动方式下,气体流速对输出功率的影响,比较分析了高抽运功率密度下各能级粒子数密度的变化趋势,最后模拟了各级放大器的功率分配比对提高级联放大器输出效率的作用。结果表明:在相同工作温度条件下,多个等长蒸气池和均等抽运光功率分配能让高级数放大器获得比低级数放大器更高的放大倍数。所提模型有助于高功率碱金属蒸气激光放大器的参量选择和优化设计。
[Abstract]:Based on the analysis of the laser dynamics and hydrodynamics of alkali metal vapor laser amplifiers, the effects of heat effect, saturation amplification effect, spontaneous emission amplification, high energy excitation and ionization are combined. A relatively perfect physical model is established to simulate the output characteristics of semiconductor pumped alkali metal vapor laser amplifiers under the condition of flow heat dissipation. The effect of gas velocity on the output power is analyzed and the variation trend of particle number density of each energy level under high pump power density is compared and analyzed. Finally, the effect of power distribution ratio on the output efficiency of cascade amplifier is simulated. The results show that: under the same operating temperature conditions. Multiple equal-length vapor cells and equal-pumped optical power distribution can obtain a higher magnification than low-series amplifiers. The proposed model is helpful to the parameter selection and optimization of high-power alkali metal vapor laser amplifiers. Design.
【作者单位】：周口师范学院物理与电信工程学院;
【基金】：国家自然科学基金(11547227) 周口师范学院高层次人才科研启动项目(ZKNU2014121) 周口师范学院2016年度校本项目(ZKNUB2201603)
【分类号】：TN248.2
【正文快照】： 作为有望获得高功率、高光束质量的气体激光器之一,半导体抽运碱金属蒸气激光器(DPALs)在过去的十多年中获得了广泛关注[1-9]。由于结合了固体和气体激光器的优点,碱金属蒸气激光器具有量子效率高(钾、铷、铯对应的量子效率分别为99.6%、98.1%和95.3%)、热管理性能好、发射线

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