芯泵浦高功率宽带谱平坦长波段光纤光源  

Core-pumped high-power flattened L-band fiber superfluorescent sources

作　　者：郑彦敏[1] 林碧金[1] 强则煊[1] 陈曦曜[2] 李晖[1] 邱怡申[1] 

机构地区：[1]福建师范大学激光与光电子技术研究所福建省光子技术重点实验室,医学光电科学与技术教育部重点实验室,福建福州350007 [2]闽江学院物理学与光电子信息工程系,福建福州350108

出　　处：《应用光学》2014年第3期552-556,共5页Journal of Applied Optics

基　　金：福建省教育厅基金(JB10025)资助项目

摘　　要：为了获得高功率、宽带宽及谱平坦的长波段掺铒光纤光源,基于2级双程芯泵浦,应用偏振复用技术实现泵浦瓦级供给,在泵浦总功率和光纤总长度都不变的情况下,数值分析了4种光源结构的输出特性受泵浦和光纤分配比例的影响。结果表明,4种结构基本都能工作于L波段(1 565nm^1 610nm),带宽受结构影响较小,但只有"双程后向+双程后向"结构可同时拥有高输出功率和高平坦度。其在总泵浦功率750mW,第一级泵浦功率为300mW,第二级泵浦功率为450mW时,和光纤总长度21m,第一级光纤长度为18m,第二级光纤长度为3m时,可实现输出功率314mW,带宽32.41nm,中心波长1 584.84nm,平坦度2.23dB的L波段超荧光光源。To demonstrate high-power,broad-bandwidth and spectrum-flattened L-band erbiumdoped fiber superfluorescent source(SFS),four different core-pumped dual-stage double-pass configurations were proposed based on polarization multiplexing technique,offering Walt-level pump power.The impact of the pumping ratio and fiber length arrangement on the spectrum characteristics including flatness,bandwidth,center wavelength and total output power were numerically investigated with the same total length and total pump power.It shows that four structures can basically work at L band(1 565nm^1 610nm)and the bandwidth is less sensitive to structure change.Only the backward-pumped dual-stage double-pass configuration can simultaneously provide high flatness and high output power.A SFS with 314mW output power,32.41nm bandwidth,1 584.84nm center wavelength and 2.23dB flatness can be demonstrated while the total pump power and the pump powers of the first and second stages are 750 mW,300mW and 450mW,respectively,and the total fiber length,the fiber lengths of the first and second stages are 21m,18mand 3m,respectively.

关 键 词：超荧光光纤光源 长波段 掺铒光纤 级联 

分 类 号：TN253[电子电信—物理电子学]