物理学报Issue(16)：1-6,6.DOI:10.7498/aps.64.164204
国产光纤实现直接抽运全光纤化3000 W级激光输出∗
3000 W direct-pumping all-fib er laser based on domestically pro duced fib er
摘要
Abstract
In this paper we present an all-fiber directly pumped fiber laser in master oscillator power amplifier configuration based on domestically manufactured fibers. In the amplifier stage of the laser, the gain fibers adopt the 20/400 µm Yb-doped double cladding fibers manufactured separately by Wuhan Fiber Home Technologies Group and China Electronics Technology Group Corporation No. 46 Research Institute in two individual experiments. Via this homemade amplifier stage, the system achieves a 1080 nm fiber laser with output powers of 3050 W and 3092 W respectively with two types of fibers. When the gain fiber of the amplifier adopts the YDF manufactured by Wuhan Fiber Home Technologies Group, the corresponding extraction efficiency and the optical-to-optical efficiency reach 67.3% and 63.0% respectively. No residual pump laser is found in the spectrum of output laser, and the beam quality is measured to be M 2 < 2. Similarly, when the gain fiber of the amplifier adopts the YDF manufactured by China Electronics Technology Group Corporation No. 46 Research Institute, the corresponding extraction efficiency and the optical-to-optical efficiency reach 68.2% and 63.9% respectively. To the best of our knowledge, this is the best result ever reported for directly pumped all-fiber laser. Meanwhile, as we use the domestically manufactured fiber as the gain fiber in the amplifier stage, the result verifies the usage of homemade active fibers in 3-kilowatt level fiber laser. By combining the results of the high power fiber laser, the low efficiency of domestic fiber laser in our experiment might be explained to be due to defects in fiber manufacturing process, the inhomogeneous refractive index of the core, structural flaw of the homemade fiber observed by the microscopic images of the cross section and the splicing fuse of homemade fibers. The main difficulty of these two experiments lies in the heat dissipation of the gain fiber in the amplifier stage. Also, due to the restriction of experimental condition, photodarkening test is unable to run for a longer period of time, which is the focus of our further work. Therefore, measures such as refining fiber manufacturing techniques, increasing pump power and optimizing the length of fiber are suggested to be taken in order to obtain a higher output power from homemade fiber laser.关键词
高功率光纤激光器/直接抽运/国产光纤/全光纤化Key words
high power fiber laser/direct pumping/domestic fibers/all-fiber引用本文复制引用
王雪娇,巩马理,肖起榕,闫平,陈霄,李丹,杜城,莫琦,衣永青,潘蓉..国产光纤实现直接抽运全光纤化3000 W级激光输出∗[J].物理学报,2015,(16):1-6,6.基金项目
国家自然科学基金(批准号:61307057)和中国博士后科学基金(批准号:2012M520258,2013T60109)资助的课题.@@@@* Project supported by the National Natural Science Foundation of China (Grant No.61307057) and the China Postdoctoral Science Foundation (Grant Nos.2012M520258,2013T60109) （批准号:61307057）
