260 W波长锁定光纤耦合输出泵浦模块实验研究

吴华玲; 雷军; 郭林辉; 王丞乾; 谢鹏飞; 刘雨萱; 张永刚; 程心刚; 李潇潇; 吕文强; 王昭; 高松信

doi:10.11884/HPLPB202234.210558

260 W波长锁定光纤耦合输出泵浦模块实验研究

doi: 10.11884/HPLPB202234.210558

吴华玲^{1, 2,},
雷军^{1, 2},
郭林辉^{1, 2},
王丞乾^{1, 2},
谢鹏飞^{1, 2},
刘雨萱^{1, 2},
张永刚^{1, 2},
程心刚^{1, 2},
李潇潇^{1, 2},
吕文强^{1, 2},
王昭^{1, 2},
高松信^{1, 2}

1.
中国工程物理研究院高能激光科学与技术重点实验室，四川绵阳 621900
2.
中国工程物理研究院应用电子学研究所，四川绵阳 621900

基金项目: 装备预研共用技术项目（41414060102）；基础加强项目（2020-JCJQ-245-12-03）。

详细信息

作者简介:
吴华玲，wuhualing08@126.com

中图分类号: TN248
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- 被引次数: 0
出版历程
- 收稿日期: 2021-12-12
- 修回日期: 2022-05-05
- 网络出版日期: 2022-05-11
- 刊出日期: 2022-06-15

Experimentation of 260 W wavelength stabilized fiber-coupled diode laser pumping model

Wu Hualing^{1, 2
,},
Lei Jun^{1, 2},
Guo Linhui^{1, 2},
Wang Chengqian^{1, 2},
Xie Pengfei^{1, 2},
Liu Yuxuan^{1, 2},
Zhang Yonggang^{1, 2},
Cheng Xin’gang^{1, 2},
Li Xiaoxiao^{1, 2},
Lü Wenqiang^{1, 2},
Wang Zhao^{1, 2},
Gao Songxin^{1, 2}

1.
Key Laboratory of Science and Technology on High Energy Laser, CAEP, Mianyang 621900, China
2.
Institute of Applied Electronics, CAEP, Mianyang 621900, China

摘要

摘要: 半导体光纤耦合输出泵浦源是光纤激光器的核心器件，其性能直接制约光纤激光器的输出水平。采用COS封装的高功率LD芯片，通过VBG外腔光谱锁定和精密光束整形变换技术，结合偏振合束与精密聚焦耦合技术将18个LD单元耦合进105 μm/NA0.22光纤，获得不低于260 W功率输出。实验表明，该模块在注入电流18 A时，可获得稳定输出连续功率264 W，对应电光效率52%，输出光谱中心波长975.92 nm，谱宽0.51 nm。该设计为获得高功率、高亮度波长稳定泵浦源提供了一条可行途径，光纤耦合输出模块工程化后可广泛应用在光纤激光器泵浦等领域。
- 半导体激光器 /
- 光纤耦合 /
- 波长锁定 /
- 光束整形
Abstract: As pump station, fiber-coupled diode laser source is one of the key elements of fiber laser, its performance restricts the output level of the fiber laser directly. Aimed at a multi-mode fiber of 105 μm core diameter and 0.22 numerical aperture, a 260 W-level high-brightness fiber-coupled diode laser model based on single-emitter-COS (chip on submount) is developed. In the design, volume Bragg grating (VBG) is used to control the spectrum of the corresponding emitter at a narrow bandwidth (about 0.5 nm), and the beam shaping technologies, polarization multiplexing and aspherical lens are taken to couple the 18 LD beams into the multi-mode fiber. The experiment indicates that, the beam shaping system can couple the 18 LD beams into the fiber, and the output power can achieve 264 W, with the E-O efficiency of 52% at operation current 18 A. Simultaneously, the central wavelength of the model is locked at 975.92 nm with an FWHM of 0.51 nm. This design offers a feasible approach to the spectral-controlled fiber-coupled diode laser. The engineered fiber-coupled diode laser system can be widely used in fiber pumping and many other areas.
- diode laser /
- fiber coupling /
- wavelength-control /
- beam shaping

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图 1 光路布局

Figure 1. Optical system design

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图 2 VBG锁定原理

Figure 2. The principle of VBG wavelength-control

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图 3 VBG波长锁定前后光谱

Figure 3. The spectrum with/without VBG wavelength control

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图 4 光束准直

Figure 4. Beam collimation

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图 5 偏振合束

Figure 5. Polarization complexing system

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图 6 光纤耦合模块实体结构设计

Figure 6. Structure design of fiber coupling module

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图 7 功率与光谱测试

Figure 7. Testing of output power and spectrum

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图 8 模块输出特性曲线

Figure 8. Output curves

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表 1 单管芯片的主要特性参数(25 ℃)

Table 1. Main parameters of the LD chip (25 ℃)

emitter contact width/μm	cavity length/mm	θ_\|\|/(°)	θ_⊥/(°)	centroid wavelength/nm	power@18 A/W
120	4	9(95% energy)	52(95% energy)	976±3	＞16.5

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表 2 波长锁定前后功率传输效率

Table 2. Transmission efficiency of VBG

power/W	wavelength/nm	power/W	wavelength/nm	FWHM/nm	transmission efficiency of VBG/%
free-running		lensed with VBG			transmission efficiency of VBG/%
16.62	977.30	16.12	975.34	0.49	97.0
16.57	975.48	16.02	975.34	0.50	96.7
16.58	977.72	16.04	975.34	0.51	96.7
16.44	977.58	15.91	975.34	0.49	96.8
16.60	977.72	16.14	975.34	0.49	97.2
16.61	977.86	16.11	975.20	0.48	97.0
16.47	977.86	16.02	975.20	0.49	97.3

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