期刊
IEEE PHOTONICS JOURNAL
卷 14, 期 1, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2021.3137934
关键词
Couplings; Fiber lasers; Splicing; Power lasers; Gas lasers; Laser modes; Laser stability; Hollow-core fibers; end caps; high power transmission; coupling methods
资金
- Outstanding Youth Science Fund Project of Hunan Province Natural Science Foundation [2019JJ20023]
- National Natural Science Foundation of China [11974427, 12004431]
- State Key Laboratory of Pulsed Power Laser [SKL2020ZR05, SKL2021ZR01]
- Science and Technology Innovation Program of Hunan Province [2021RC4027]
- Postgraduate Scientific Research Innovation Project of Hunan Province [CX20200017]
This study investigates the stable and efficient coupling of a high-power continuous-wave fiber laser with anti-resonant hollow-core fibers spliced with end caps. By optimizing the splicing process, a maximum laser power of 460 W was injected and 356.5 W was outputted under uncooled conditions, realizing a total transmission efficiency of approximately 77.5%. The study opens new opportunities for stable and highly efficient coupling of high-power lasers with hollow-core fibers, which is significant for their applications in various fields.
Hollow-core fibers provide an ideal environment for the interaction of a laser and gases; however, achieving stable and efficient coupling of a high-power laser is one of the key problems to be solved. Here, we study stable and efficient coupling of a high-power continuous-wave fiber laser with anti-resonant hollow-core fibers spliced with end caps. By optimizing the splicing process, a maximum laser power of 460 W was injected and 356.5 W was outputted under uncooled conditions, realizing a total transmission efficiency of approximately 77.5%. A test of more than 1 h showed the stability of this a coupling method. A few other important characteristics, such as the Fresnel reflection of the end caps and the influence of the end caps on the transmission beam quality, were measured and examined. This study opens new opportunities for stable and highly efficient coupling of high-power lasers with hollow-core fibers, which is significant for their applications in many other fields besides high-power fiber gas lasers, such as high-power laser delivery and liquid lasers in hollow-core fibers.
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