On the initiation of fiber fuse damage in high-power ytterbium-doped fiber lasers  

作　　者：JIADING TIAN ZEHUI WANG QIRONG XIAO DAN LI PING YAN MALI GONG 

机构地区：[1]Department of Precision Instrument,Ministry of Education Key Laboratory of Photonic Control Technology,Tsinghua University,Beijing 100084,China [2]Department of Precision Instrument,State Key Laboratory of Precision Measurement Technology and Instruments,Tsinghua University,Beijing 100084,China [3]Department of Laser Equipment,Jiangsu Shuguang Photoelectric Co.,Ltd.,Yangzhou 225009,China

出　　处：《Photonics Research》2022年第11期2513-2525,共13页光子学研究（英文版）

摘　　要：Fiber fuse effect can occur spontaneously and propagate along optical fibers to cause widespread damage;it threatens all applications involving optical fibers. This paper presents two results. First, it establishes that the initiation of fiber fuse(IFF) in silica fibers is caused by virtual-defect-induced absorption. Critical temperatures and critical optical powers for IFF are simulated for the first time using a 3D solid-state heat transfer model with heat source generated by the virtual-defect-induced absorption. In this method, formation energies of the virtual defects can be uniquely determined, which offers critical information on the chemical reasons for fiber fuse. Second, this paper offers a method to evaluate operating temperatures of fiber lasers. General analytical solutions of the operating temperatures along gain fibers are deduced. Results of 976-nm laser-diode-pumped and 1018-nm tandem-pumped ytterbium-doped fiber(YDF) amplifiers using 10/130-μm YDFs are calculated.Potential limits caused by fiber fuse are discussed.

关 键 词：FIBER PUMPED power 

分 类 号：TN248[电子电信—物理电子学]