Mid-infrared supercontinuum generation in step-index As2S3 fibers pumped by a nanosecond shortwave-infrared supercontinuum pump source

作者：Yao, Jinmei; Zhang, Bin^*; Yin, Ke; Yang, Linyong; Hou, Jing; Lu, Qisheng

来源：Optics Express, 2016, 24(13): 15093-15100.

DOI：10.1364/OE.24.015093

• Chalcogenide fibers
• Maximum output power
• Mid-infrared supercontinuum
• Power distributions
• Short wave infrared
• Spectral broadening
• Supercontinuum sources
• Zero-dispersion wavelength

A supercontinuum (SC) source spanning from 2 to 4 mu m is demonstrated in As2S3-chalcogenide fibers pumped by a nanosecond supercontinuum pump source in the normal dispersion region. In this experiment, two pieces of 3-m-long step-index As2S3 fiber with different core diameters of 7 mu m and 9 mu m are pumped by a 1.9-2.5 mu m nanosecond supercontinuum source. The zero dispersion wavelengths are both beyond 6.6 mu m, thus cascaded stimulated Raman scattering is believed to be the dominant mechanism responsible for spectral broadening. With a low peak pump power of similar to 2.9 kW, both of the output spectra have extended to 4 mu m with enhanced power distribution in the MIR region. The maximum output power of the mid-infrared supercontinua is similar to 140 mW. To the best of our knowledge, it is the first supercontinuum extenting to 4 mu m in an As2S3 fiber pumped by shortwave-infrared SC pluses in the normal dispersion region.

• 出版日期2016-6-27
• 单位中国人民解放军国防科学技术大学