High-power mid-infrared supercontinuum laser source using fluorotellurite fiber

Chuanfei Yao, Zhixu Jia, Zhenrui Li, Shijie Jia, Zhipeng Zhao, L. E.I. Zhang, Y. A.N. Feng, Guanshi Qin, Yasutake Ohishi, Weiping Qin

Research output: Contribution to journalArticlepeer-review

111 Scopus citations

Abstract

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 (∼424°C). By using a 60 cm long fluorotellurite fiber with a core diameter of 6.8 μm 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 ∼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.

Original languageEnglish
Pages (from-to)1264-1270
Number of pages7
JournalOptica
Volume5
Issue number10
DOIs
StatePublished - 20 Oct 2018
Externally publishedYes

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