中国激光, 2018, 45 (12): 1206001, 网络出版: 2019-05-09   

一种大模场沟槽辅助型扇形瓣状光纤的研究 下载: 812次

Trench-Assisted Fan-Segmented Cladding Fiber with Large Mode Area
作者单位
1 北京交通大学全光网络与现代通信网教育部重点实验室, 北京 100044
2 曲阜师范大学物理工程学院, 山东 曲阜 273165
摘要
设计了一种抗弯曲大模场面积单模光纤方案——沟槽辅助型瓣状光纤。纤芯中间加入了低折射率辅助沟槽,纤芯四周围绕高折射率扇形瓣。利用COMSOL软件计算模式损耗、模场面积等性能。研究表明: 在弯曲半径为15 cm的情况下,光纤模场面积可达700 μm 2,高阶模和基模损耗比大于100,能够实现有效单模操作。此外,当弯曲方向在[-180°,180°]范围内变化时,光纤性能保持稳定。这种光纤在紧凑型高功率光纤激光器和放大器领域显示出巨大的潜力。
Abstract
This study proposes a novel large mode area fiber structure with bend-resistant and single-mode operation, known as trench-assisted segmented cladding fiber. In this structure, a low refractive index (RI) trench is added to the fiber core and the core is surrounded periodically with high RI fan-segmented claddings. COMSOL software is used to calculate the mode leakage loss and mode area. Numerical analysis indicates that when the indicates bending radius of the fiber is 15 cm, the mode field area of the fiber can achieve 700 μm 2. Meanwhile, the loss ratio between the high-order mode (HOM) and fundamental mode (FM) is >100, which ensures effective single-mode operation. In addition, the fiber performance is stable within the bending orientation from -180° to 180°. Based on the results of this study, the proposed fiber has the potential to play an important role in developing high-power fiber lasers and amplifiers.

刘诗男, 宁提纲, 马绍朔, 郑晶晶, 许建, 温晓东. 一种大模场沟槽辅助型扇形瓣状光纤的研究[J]. 中国激光, 2018, 45(12): 1206001. Shinan Liu, Tigang Ning, Shaoshuo Ma, Jingjing Zheng, Jian Xu, Xiaodong Wen. Trench-Assisted Fan-Segmented Cladding Fiber with Large Mode Area[J]. Chinese Journal of Lasers, 2018, 45(12): 1206001.

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