Raman amplification at 2.2μm in silicon core fibers with prospects for extended mid-infrared source generation  

作　　者：Meng Huang Shiyu Sun Than S.Saini Qiang Fu Lin Xu Dong Wu Haonan Ren Li Shen Thomas W.Hawkins John Ballato Anna C.Peacock 

机构地区：[1]Optoelectronics Research Centre,University of Southampton,Southampton SO171BJ,UK [2]School of Optoelectronic Engineering and Instrumentation Science,Dalian University of Technology,Dalian 116024,China [3]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [4]Center for Optical Materials Science and Engineering Technologies and Department of Materials Science and Engineering,Clemson University,Clemson,SC 29634,USA

出　　处：《Light(Science & Applications)》2023年第10期2097-2104,共8页光（科学与应用)（英文版）

基　　金：support from the following funding bodies:A.C.P.—Engineering and Physical Sciences Research Council(EPSRC,EP/P000940/1);Q.F.—EPSRC(EP/P027644/1);J.B.and T.W.H.—J.E.Sirrine Foundation;L.S.—National Natural Science Foundation of China(62175080);M.H.—Chinese Scholarships Council.

摘　　要：Raman scattering provides a convenient mechanism to generate or amplify light at wavelengths where gain is not otherwise available.When combined with recent advancements in high-power fiber lasers that operate at wavelengths~2μm,great opportunities exist for Raman systems that extend operation further into the mid-infrared regime for applications such as gas sensing,spectroscopy,and biomedical analyses.Here,a thulium-doped fiber laser is used to demonstrate Raman emission and amplification from a highly nonlinear silicon core fiber(SCF)platform at wavelengths beyond 2μm.The SCF has been tapered to obtain a micrometer-sized core diameter(~1.6μm)over a length of 6 cm,with losses as low as 0.2 dB cm^(−1).A maximum on-off peak gain of 30.4 dB was obtained using 10 W of peak pump power at 1.99μm,with simulations indicating that the gain could be increased to up to~50 dB by extending the SCF length.Simulations also show that by exploiting the large Raman gain and extended mid-infrared transparency of the SCF,cascaded Raman processes could yield tunable systems with practical output powers across the 2–5μm range.

关 键 词：fiber PUMP SCATTERING 

分 类 号：TN2[电子电信—物理电子学]