Open AccessUltra-efficient Raman amplifier in methane-filled hollow-core fiber operating at 15 μm
Author(s) -
Yubin Chen,
Zefeng Wang,
Zhixian Li,
Wei Huang,
Xiaoming Xi,
Qin Lu
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.020944
Subject(s) - materials science , raman spectroscopy , optics , laser linewidth , raman scattering , core (optical fiber) , fiber laser , methane , optoelectronics , laser , raman laser , photonic crystal fiber , amplifier , optical fiber , optical amplifier , physics , chemistry , organic chemistry , cmos , composite material , wavelength
We report on what is, to the best of our knowledge, the first ultra-efficient 1.5 μm Raman amplifier in a methane-filled anti-resonance hollow-core fiber. A 1.5 μm 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.