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新型双沟槽抗弯曲大模场扇形瓣状光纤研究

Novel Bend-Resistant Large-Mode-Area Fan-Segmented Cladding Fiber with Double Trenches

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摘要

光纤激光器作为第三代激光器的代表,由于具有光束质量高、阈值低、转换效率高、散热性好等优点,已被广泛应用在通信传输、工业制造、国防军事、医疗卫生等领域[1-2]。近些年来,光纤激光器的输出功率从最初的几瓦提高到目前的数千瓦量级[3-6]。然而,随着理论的进一步研究,一些因素逐渐成为限制光纤激光器输出功率不断提高的难点所在,例如:非线性效应限制了激光功率的进一步提升;模式不稳定现象降低了激光器的输出光束质量[7-8]。

Abstract

A novel double-trench-assisted fan-segmented cladding fiber (SCF) is proposed and researched. Compared with traditional fan-SCF and single-trench-assisted fan-SCF, the proposed fiber structure has a larger mode area and better high-order mode (HOM) suppression. Numerical investigations show that, when the bending radius is 20 cm, the effective mode area of the fundamental mode (FM) reaches up to 1096 μm 2 and the loss ratio between HOM and the FM is greater than 100 at a wavelength of 1.55 μm. In addition, the proposed fiber structure is insensitive to the bending orientation and its properties remain stable with a bending orientation ranging from -180° to 180°.

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DOI:10.3788/AOS201939.1006008

所属栏目:光纤光学与光通信

基金项目:国家自然科学基金;

收稿日期:2019-04-11

修改稿日期:2019-07-05

网络出版日期:2019-10-01

作者单位    点击查看

王冠利:北京交通大学电子信息工程学院全光网络与现代通信网教育部重点实验室, 北京 100044
宁提纲:北京交通大学电子信息工程学院全光网络与现代通信网教育部重点实验室, 北京 100044
郑晶晶:北京交通大学电子信息工程学院全光网络与现代通信网教育部重点实验室, 北京 100044
李晶:北京交通大学电子信息工程学院全光网络与现代通信网教育部重点实验室, 北京 100044
许建:北京交通大学电子信息工程学院全光网络与现代通信网教育部重点实验室, 北京 100044
魏淮:北京交通大学电子信息工程学院全光网络与现代通信网教育部重点实验室, 北京 100044
裴丽:北京交通大学电子信息工程学院全光网络与现代通信网教育部重点实验室, 北京 100044
马绍朔:北京交通大学电子信息工程学院全光网络与现代通信网教育部重点实验室, 北京 100044

联系人作者:裴丽(lipei@bjtu.edu.cn)

备注:国家自然科学基金;

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引用该论文

Guanli Wang,Tigang Ning,Jingjing Zheng,Jing Li,Jian Xu,Huai Wei,Li Pei,Shaoshuo Ma. Novel Bend-Resistant Large-Mode-Area Fan-Segmented Cladding Fiber with Double Trenches[J]. Acta Optica Sinica, 2019, 39(10): 1006008

王冠利,宁提纲,郑晶晶,李晶,许建,魏淮,裴丽,马绍朔. 新型双沟槽抗弯曲大模场扇形瓣状光纤研究[J]. 光学学报, 2019, 39(10): 1006008

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