Study on forward stimulated Brillouin scattering in a backward pumped fiber Raman amplifier

查看全文 作　　者：[1]张在宣;[1]李来晓;[1]耿丹;[1]戴碧智;[1]金永兴;[2]刘红林;Insoo [3]S.Kim;[1]王剑锋;[1]吴孝彪;[1]方达伟;[1]庄松林 机构地区：[1]Optelectronics Technology Institute;[2]College of Optics and Electronics;[3]Information & Optical Technology Research Group 出　　处：《Chinese Optics Letters》索引2004年第2卷第11期,共3页 基　　金：TheworkwassupportedbytheGreatScientificRe-searchProjectofZhejiangProvince,P.R.Chinaun-derGrantNo.021101558. 摘　　要：Strong multi-order forward stimulated Brillouin scattering (SBS) has been observed in the backward pumped S-band distributed fiber Raman amplifier (FRA) with tunable narrow signal source (less than 100MHz) when the pump power of FRA reached the SBS threshold. This does not obey the theory that only weak backward SBS lines exist according to the conservation of energy and momentum and the wave vector selected rule. This is because the sound waveguide characteristic weakens the wave vector rule, and the forward transmitted sound waveguide Brillouin scattering lines are generated and amplified in FRA. When the pump power is further increased, 11 orders of SBS lines and comb-like profile are observed. For the excited line, the frequency is 197.2296 THz and the power is 0 dBm. The even order SBS lines are stronger than odd order SBS lines, the power of the 2nd and 4th order SBS lines is 1.75dBm, which is 16dB higher than that of the 1st and 3rd order SBS lines. The odd order SBS lines are named Brillouin-Rayleigh scattering lines. 关 键 词：FRA SBS I-O MH