Ultra-efficient Raman amplifier in methane-filled hollow-core fiber operating at 1.5 mu m

作者：Chen, Yubin; Wang, Zefeng^*; Li, Zhixian; Huang, Wei; Xi, Xiaoming; Lu, Qisheng

来源：Optics Express, 2017, 25(17): 20944-20949.

DOI：10.1364/OE.25.020944

We report on what is, to the best of our knowledge, the first ultra-efficient 1.5 mu m Raman amplifier in a methane-filled anti-resonance hollow-core fiber. A 1.5 mu m single frequency seed laser is coupled into the hollow-core fiber together with a 1064 nm pulsed pump laser using a shortpass dichromic mirror, and then amplified by stimulated Raman scattering of methane. A maximum optical-to-optical conversion efficiency of 66.4% has been obtained, resulting in a record near quantum-limit efficiency of 96.3% in a 2 m long hollow-core fiber filled with only 2 bar methane gas. This kind of gas filled hollow-core Raman amplifier provides a potential method to obtain high efficiency mid-infrared laser sources with low threshold and narrow linewidth in various applications.

• 出版日期2017-8-21
• 单位中国人民解放军国防科学技术大学