铒镱共掺三硼酸铝钇晶体维尔德常数的测量  

Measurement of Verdet constant of Er,Yb∶YAl_(3)(BO_(3))_(4) crystal

作　　者：王文荣 戚蒙 李渊骥[1,2] 冯晋霞 张宽收[1,2] WANG Wenrong;QI Meng;LI Yuanji;FENG Jinxia;ZHANG Kuanshou(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学光电研究所量子光学与光量子器件国家重点实验室,太原030006 [2]山西大学极端光学协同创新中心,太原030006

出　　处：《激光技术》2025年第2期223-226,共4页Laser Technology

基　　金：国家自然科学基金资助项目(62175135);中央引导地方科技发展资金资助项目(YDZJSX20231A006);山西省基础研究计划资助项目(202103021224025)。

摘　　要：为了利用激光增益介质自身的磁光效应,构建免额外磁光晶体的单向行波环形谐振腔或者单块非平面环形谐振腔,从而满足制备功率大于瓦级的连续波单频1.5μm固体激光器的应用需求,采用了磁光调制技术结合平衡探测技术的方法,对铒镱共掺三硼酸铝钇晶体的维尔德常数进行了实验测量,得到了不同掺杂原子数分数及不同温度下晶体的维尔德常数。结果表明,当镱离子掺杂原子数分数为10%、15%、25%时,测得铒镱共掺三硼酸铝钇晶体的维尔德常数分别为48.11°/(T·m)、33.05°/(T·m)、10.88°/(T·m);当镱离子掺杂原子数分数为25%的铒镱共掺三硼酸铝钇晶体的控温温度从13℃提高到38℃时,晶体的维尔德常数从11.40°/(T·m)降低至10.15°/(T·m);铒镱共掺三硼酸铝钇晶体的维尔德常数与钇铝石榴石晶体可比拟;此外,该晶体具有明显的顺磁性,减小镱离子掺杂原子数分数,或者降低激光晶体控温温度将有助于提升激光晶体自身的磁致旋光特性。该研究为构建无额外磁光晶体的连续波单频固体激光器提供了参考。In order to construct a unidirectional traveling-wave ring resonator or non-planar ring resonator that utilizes the magneto-optical effect of the laser gain medium itself without additional magneto-optical crystals,so as to meet the application requirements of preparing continuous wave single-frequency 1.5μm solid-state lasers with power greater than watts,the Verdet constants of Er,Yb∶YAl_(3)(BO_(3))_(4) crystals were experimentally investigated by means of magneto-optical modulation technique combined with balanced detection.The Verdet constants of Er,Yb∶YAl 3(BO 3)4 crystals at different doped atomic fractions and temperatures were obtained.The results show that the measured Verdet constants of Er,Yb∶YAl_(3)(BO_(3))_(4) crystals with different doped atomic fractions of Yb ions,namely 10%,15%and 25%,are 48.11°/(T·m),33.05°/(T·m)and 10.88°/(T·m),respectively.When the temperature of Er,Yb∶YAl 3(BO 3)4 crystal with a Yb 3+doped atomic fractions of 25%is increased from 13℃ to 38℃,the Verdet constant showes a nonlinear decrease from 11.40°/(T·m)to 10.15°/(T·m).The Verdet constant of the Er,Yb∶YAl_(3)(BO_(3))_(4) crystal is comparable with that of the yttrium aluminum garnet crystal.Moreover,the crystal exhibits paramagnetism.The magneto-optic rotation performance of the gain medium can be improved by either employing the low doped crystal or lowering the crystal temperature.This study provides a reference for the construction of continuous wave single frequency solid-state lasers without additional magneto-optical crystals.

关 键 词：激光光学 维尔德常数 磁光调制 铒镱共掺三硼酸铝钇晶体 平衡探测 

分 类 号：TN248.1[电子电信—物理电子学]