Propagation of high-power fiber laser with high-order-mode content

作     者：Rumao Tao Long Huang Pu Zhou Lei Si Zejin Liu 

作者机构：College of Optoelectric Science and Engineering National University of Defense Technology 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2015年第3卷第4期

页      面：192-199页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：sponsored by the Innovation Foundation for Excellent Graduates in the National University of Defense Technology under grant no. B120704 the Open Research Fund of Key Laboratory of Atmospheric Composition and Optical Radiation under grant no.2012JJ05 

主　　题：mode Propagation of high-power fiber laser with high-order-mode content PIB high 

摘      要：Propagation properties of high-power fiber laser with high-order-mode(HOM) content are studied numerically for the first time to the best of our knowledge. The effect of HOM on the propagation property is evaluated by the power in the bucket(PIB) metric. It is shown that PIB is mainly dependent on HOM content rather than the relative phase between the fundamental mode and HOM. The PIB in vacuum is more than 80% when the power fraction of the HOM is controlled to be less than 50% at 5 km. The relative phase has an impact on the peak intensity position and concentration of the far-field intensity distribution. If an adaptive optics system is used to correct the peak intensity deviation, the results indicate that there exists a maximal value of PIB as relative phase increases. Such effect is weakened when propagating in turbulence. Compared to the laser beams without HOM, laser beams with HOM content are less influenced by the turbulence and can reduce average intensity fluctuation. The results may be useful in the design of a high-power fiber laser system.