Research on key technologies of high-power fiber laser materials and devices

National key R & D project “Research on key technologies of high-power fiber laser materials and devices” will meet the mid-term inspection


The 2016 National Key R & D Plan “Key Technology Research on High Power Fiber Laser Materials and Devices”, undertaken by South China University of Technology, will usher in the mid-term inspection in Suzhou in January 2018. At the current project progress reporting meeting in 2017, various tasks are progressing smoothly, breakthroughs have been made in some key technology areas, and some technical indicators and results have reached international advanced levels.
On December 8, 2017, the 2017 Annual Progress Report Conference of the 2016 National Key R & D Program “Strategic Advanced Electronic Materials”, a key special project of “High-power Fiber Laser Materials and Devices,” undertaken by South China University of Technology, was held in Central China Wuhan The University of Science and Technology was successfully held. Leaders and experts who participated in the project progress report included Director Shi Dongmei of the High Technology Research and Development Center of the Ministry of Science and Technology, Academician Jiang Desheng of Wuhan University of Technology, Academician Zhu Shining of Nanjing University, Professor Pan Feng of Tsinghua University, and representatives of the participating units. Professor Ma Jianhui, Deputy Secretary of the Party Committee of Huazhong University of Science and Technology, addressed the meeting.

The “Research on Key Technologies of High-Power Fiber Laser Materials and Devices” project is led by South China University of Technology, in conjunction with Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Institute of Semiconductors, Chinese Academy of Sciences, Huazhong University of Science and Technology, Nanjing Institute of Advanced Laser Technology, and Suzhou Biological Medical Engineering Technology Research Institute, National University of Defense Technology, Tianjin University and other domestic universities and research institutes in the field of fiber laser materials and laser technology, and Suzhou Changguang Huaxin Optoelectronics Technology Co., Ltd. and Wuhan Ruike Fiber Laser Technology Co., Ltd. , Shanghai Feibo Laser Technology Co., Ltd., Guangzhou Hongsheng Optoelectronics Technology Co., Ltd. and other outstanding enterprises jointly undertake.
The project is in response to the urgent demand for the localization of high beam quality 10,000-watt fiber lasers, and it is urgent to break through the key technologies of high-power fiber laser materials and devices. The research focuses on the key core fiber materials and components for constructing high-power fiber lasers, high-quality laser pump sources, and high-performance single-frequency laser seed sources. It is planned to develop: ① high-gain large-mode field for 10,000-watt fiber lasers Optical fiber, beam combiner, grating, and cladding light stripper; ② Lifetime> 20,000 hours high-brightness semiconductor laser chip and power> 2000W pump source; ③ Brightness> 100MW / cm2 / Sr photonic crystal laser; ④ Line width <10kHz hundred Watt-level single-frequency laser and achieve> 3000W output through beam combining.
At the project progress report, Professor Yang Zhongmin, the person in charge of the project, gave a detailed report on the project’s general situation, expert consultation, overall research and development technology plan, and 2017 progress. In addition, the project leaders reported the completion of work tasks and indicators and the implementation of the budget, summarized the major breakthroughs and important results, identified problems and proposed rectification measures, exchanged management experience, and ensured the smooth implementation of the project. Finally, the leaders of the Ministry of Science and Technology and the participating experts highly affirmed the annual work achievements of the project, and expressed their full expectations and prospects for the mid-term inspection. The participating experts consulted and demonstrated the 15 opinions put forward by the expert group at the project launch meeting, and the project leaders answered them one by one.

Significant progress has been made in the research work of the project, and significant breakthroughs have been achieved in 10,000-watt high-gain glass fiber materials and components, high-performance laser pump sources, and high-performance single-frequency laser seed sources, which have reached the leading level of similar international research. (1) Single-fiber output power of high-gain glass fiber 10.155kW; (6 + 1) × 1 beam combiner single arm withstands power 1850W; fiber grating withstands power 1800W; cladding optical stripper filter power 1000W, attenuation coefficient 50dB; (2) 976nm fiber-coupled semiconductor laser pump source (50μm wide chip) output power 10.8W, chip life exceeded 12000h; (3) 976nm band cone photonic crystal laser output power 7.3W, brightness 29.7MW / cm2 / Sr, vertical The divergence angle is about 11 °; (4) 1064nm and 1950nm single-frequency fiber lasers output 166W and 57W respectively; based on the coherent polarization of 4 channels of narrow-line fiber lasers, the combined power is 5.02kW and the combined efficiency is 93.8%.

The new technology represented by “light manufacturing” has brought revolutionary changes to traditional industrial manufacturing. The 10,000-watt high-power fiber laser is the core light source for high-end laser manufacturing. The project is about to enter the mid-term inspection phase. With this opportunity, all participating units will continue to strengthen their research and development efforts, and will welcome the mid-term assessment with full enthusiasm and excellent results. From the perspective of national economic construction, scientific research needs, and national defense security, the project is committed to achieving the urgent requirements and ultimate goal of high-quality 10,000-watt-level fiber laser localization in China.