第1.5代“三高一优”YDF特种激光光纤

俞娟; 倪力; 彭昆; 向恒; 冷晓晓; 林傲祥

doi:10.11884/HPLPB202436.240268

第1.5代“三高一优”YDF特种激光光纤

doi: 10.11884/HPLPB202436.240268

中国工程物理研究院化工材料研究所，四川绵阳 621900

基金项目: 高功率光纤激光技术所级重大专项；高功率光纤激光技术所地联合创新中心项目

详细信息

作者简介:
俞　娟，54795150@qq.com

通讯作者:
林傲祥，10778713@qq.com。

中图分类号: TN244
计量
- 文章访问数: 41
- HTML全文浏览量: 21
- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2024-08-15
- 修回日期: 2024-09-18
- 录用日期: 2024-09-18
- 网络出版日期: 2024-09-21

The 1.5G “three-high/one-excellent” YDF specialty laser fiber

Institute of Chemical Materials, CAEP, Mianyang 621900, China

摘要

摘要: 面向高端特种光纤激光器研制需求，突破限制光纤激光器系统功率输出和性能提升的技术瓶颈，中国工程物理研究院化工材料研究所高功率光纤激光技术所地联合创新中心团队采用模式裁剪制备工艺技术，率先推出了国内首创、特别适合976 nm-LD端面泵浦方式（976技术路线）的第1.5代YDF特种激光光纤，有效提升了光纤激光系统的模式不稳定阈值（TMI），显著优化了激光输出的光束质量。相对于目前普遍使用的第1.0代铝磷硅三元体系光纤（Yb-APS），第1.5代YDF特种激光光纤的激光功率提升约20%，光束质量M²优化约20%，集中展现了高功率、高效率、高TMI阈值、M²优化的“三高一优”的技术特点，可供工业市场高端客户选择和强激光技术领域应用。
- 光纤激光器 /
- 模式不稳定阈值 /
- 光束质量 /
- 单模 /
- 光纤设计与制备 /
- 激光光纤
Abstract: For the development of high-end fiber lasers and breaking through the technical bottlenecks limiting the output power and performance improvement of fiber laser systems, the Joint -Innovation Center of High Power Fiber Laser Technology, Institute of Chemical Materials (ICM) of China Academy of Engineering Physics (CAEP) , adopted mode-tailoring fabrication process technology, theoretically designed and firstly home-made 1.5th-generation (1.5G) YDF specialty laser fibers, particularly suitable for 976nm-LD end-pumping method (976-technology route) to effectively improve the threshold of mode instability (TMI) and significantly optimize the beam quality of laser output. Compared with currently widely-used 1.0G Yb-APS fiber, 1.5G YDF specialty laser fiber shows about 20% improvement both in laser output power and beam quality. The 1.5G YDF specialty laser fibers fully demonstrate “three-high/one-excellent” technical characteristics of high power, high efficiency, high TMI threshold, and M² optimization, which can be selected by high-end customers in the industrial market and/or applied in high power laser fields.
- fiber laser /
- threshold of mode instability /
- beam quality /
- single mode /
- fiber design and fabrication /
- laser fiber

HTML全文

图 1 第1.5代LMA-14/250-YDF特种激光光纤包层吸收谱及折射率分布图

Figure 1. 1.5G LMA-14/250-YDF specialty laser fiber: clad absorption spectrum and refractive-index profile

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图 2 第1.5代LMA-14/250-YDF特种激光光纤2 kW功率输出时的M²光束质量

Figure 2. Beam quality M² of 1.5G LMA-14/250-YDF at 2 kW output power

下载: 全尺寸图片幻灯片

图 3 14/360-RCF环芯传能纤横截面图

Figure 3. Cross-section photograph of 14/360-RCF fiber

下载: 全尺寸图片幻灯片

表 1 第1.5代YDF特种激光光纤参数

Table 1. 1.5G-YDF specialty laser fiber parameters

1.5G-YDF laser fiber	laser power/kW	beam quality M²
LMA-14/250-YDF	2～3	～1.05
LMA-20/400-YDF	3～4	～1.10
LMA-25/400-YDF	4～6	～1.20
PLMA-20/400-YDF	2～3	～1.20
PLMA-25/400-YDF	3～5	～1.30

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表 2 第1.5代LMA-14/250-YDF特种激光光纤参数

Table 2. 1.5G LMA-14/250-YDF specialty laser fiber parameters

parameters	unit	specification
peak cladding absorption @915 nm	dB/m	0.50±0.15
peak cladding absorption @976 nm	dB/m	1.50±0.25
cladding attenuation@1 095 nm	dB/km	≤10
core attenuation@1 200 nm	dB/km	≤10
core attenuation@1 300 nm	dB/km	≤15
core NA	—	0.070±0.005
cladding NA（5%）	—	≥0.46
core/clad offset	μm	≤1.0
core diameter	μm	14.3±0.5
clad diameter (flat-to-flat)	μm	250±5.0
max. output power	kW	≥2.0
slope efficiency@976 nm	%	≥78
beam quality M²	—	～1.05

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参考文献(15)

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