All-fiberized, multi-watt 2-5-mu m supercontinuum laser source based on fluoroindate fiber with record conversion efficiency

作者：Yang, Linyong; Zhang, Bin; Jin, Donghuan; Wu, Tianyi; He, Xuan; Zhao, Yijun; Hou, Jing^*

来源：Optics Letters, 2018, 43(21): 5206-5209.

DOI：10.1364/OL.43.005206

• All fiber structure
• High conversion efficiency
• Power stability
• Pump power coupling
• Root Mean Square
• Spectral coverage
• Supercontinuum laser
• Thulium doped fiber amplifiers

A strictly all-fiberized, multi-watt 2-5-mu m supercontinuum (SC) laser source with high conversion efficiency is presented. A broadband thulium-doped fiber amplifier with spectral coverage of 2-2.7 mu m is used to pump a piece of single-mode fluoroindate (InF3) fiber. A fusion-spliced joint with loss down to 0.07 dB is achieved between a piece of silica fiber and the InF3 fiber, which retains all-fiber structure and efficient pump power coupling. A 135-W SC with spectral coverage of 1.5-5.2 mu m and a 4.06-W SC with spectral coverage of 1.9-5.1 mu m are obtained with record conversion efficiencies of 59.5% and 63.3%, respectively. Furthermore, measured output power has a normalized root mean square superior to 0.4%, which indicates the excellent power stability of the system. This research, to the best of the authors' knowledge, demonstrates both record output power and record conversion efficiency of InF3-fiber-based mid-infrared-SC laser sources to date. It is also the first report on strictly all-fiberized SC generation in InF3 fibers.

• 出版日期2018-11-1
• 单位中国人民解放军国防科学技术大学