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玻尔兹曼分布对Yb3+掺杂光纤激光器波长的分析

Analysis of the Spectrum of Yb3+ Doped Fiber Laser with Boltzmann Distribution

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摘要

Yb3+掺杂光纤激光器输出的激光波长范围很宽,但是获得不同波长激光的难易程度不同。为了在长波长波段获得较强的激光输出,本文分析了激光输出的影响因素。根据Yb3+在玻璃基质中的能级,利用玻尔兹曼分布,计算了Yb3+离子在2F7/2和2F5/2各个Stark能级的玻尔兹曼因子的数值。并利用这一结果,绘出了基态2F7/2各Stark能级上粒子数相对比率随温度变化的曲线。结合Yb3+离子的吸收和发射截面得出结论:在长波长谱段,随着温度的升高,能够获得1 130~1 200nm波长谱段较高功率的激光输出。同时也指出在Yb3+掺杂光纤激光器的常规激光输出波段,输出功率随着温度的升高而降低。

Abstract

The working wavelength output fromYb3+-doped fiber lasers is in a wide range,but the degree of the difficulty to get some selected wavelength is different. For example,it is difficult to get high power laser output in a longer wavelength. In this work,the factors that influenced on the output of the laser are analyzed. According to the energy level of Yb3+ in the glass matrix,we calculate the Boltzmann factors of Yb3+on different Stark levels of 2F7/2 and 2F5/2 by using Boltzmann distribution. And then on the results,the variations of particle population on different 2F7/2Stark levels with the temperature are studied. Combined with the diagram of the emission and absorption cross section of Yb3+,it can thus be concluded that,in the longer wavelength range (1 130~1 200 nm),the Yb3+-doped fiber lasers can work with the high power laser output with the increase in temperature,but instead,the output power decreases in the common wavelength.

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中图分类号:TN248.1

DOI:10.3788/jqo20172304.0012

所属栏目:激态物理与激光技术

基金项目:鹤壁职业技术学院校本课题(HZY-2017-52)

收稿日期:2017-08-31

修改稿日期:2017-09-18

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蔡辉剑:鹤壁职业技术学院 机电工程学院,河南 鹤壁 458030
樊心民:潍坊学院 新型电磁材料研究所&物理与光电工程学院,山东 潍坊 261061

联系人作者:蔡辉剑(hjcai@ha.edu.cn)

备注:蔡辉剑(1963-), 男, 河南封丘人, 教师。研究方向:激光和光纤光学,

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引用该论文

CAI Hui-jian,FAN Xin-min. Analysis of the Spectrum of Yb3+ Doped Fiber Laser with Boltzmann Distribution[J]. Acta Sinica Quantum Optica, 2017, 23(4): 393-398

蔡辉剑,樊心民. 玻尔兹曼分布对Yb3+掺杂光纤激光器波长的分析[J]. 量子光学学报, 2017, 23(4): 393-398

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