Journal
OPTICA
Volume 5, Issue 10, Pages 1264-1270Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.5.001264
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Funding
- National Natural Science Foundation of China (NSFC) [11474132, 11774132, 61378004, 61527823, 61605058]
- Open Fund of the State Key Laboratory on Integrated Optoelectronics
- Tsinghua National Laboratory for Information Science and Technology Cross-discipline Foundation
- Key Technology Research and Development Project of Jilin Province [20180201120GX]
- Major Science and Technology Tendering Project of Jilin Province [20170203012GX]
- Joint Foundation from Equipment Pre-research and Ministry of Education [6141A02022413]
- Outstanding Young Talent Fund Project of Jilin Province [20180520188JH]
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
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High power mid-infrared supercontinuum (SC) laser sources are important for a wide range of applications in sensing, spectroscopy, imaging, defense, and security. Despite recent advances on high power mid-infrared SC laser sources using fluoride fibers, the lack of mid-infrared fibers with good chemical and thermal stability remains a significant technological challenge. Here we show that all solid fluorotellurite fibers we developed can be used as the nonlinear media for constructing 10-W-level mid-infrared SC laser sources. All solid fluorotellurite fibers are fabricated by using a rod-in-tube method. The core and cladding materials are TeO2-BaF2-Y2O3 and TeO2 modified fluoroaluminate glasses with good water resistance and high transition temperature (similar to 424 degrees C). By using a 60 cm long fluorotellurite fiber with a core diameter of 6.8 mu m as the nonlinear medium and a high power 1980 nm femtosecond fiber laser as the pump source, we obtain 10.4 W SC generation from 947 to 3934 nm in the fiber for a pump power of similar to 15.9 W, and the corresponding optical-to-optical conversion efficiency is about 65%. The spectral broadening is caused by self-phase modulation, soliton fission, soliton self-frequency shift, and dispersive wave generation. Our results show that all solid fluorotellurite fiber can be used for constructing high power mid-infrared SC laser sources for real applications. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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