铒镱共掺光纤及其L波段放大性能研究  

Erbium⁃Ytterbium Co⁃Doped Fiber and Its Amplification Characteristics in L⁃Band

作　　者：何乐 殷晓科 陈阳 褚应波 李进延 He Le;Yin Xiaoke;Chen Yang;Chu Yingbo;Li Jinyan(Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Wuhan Changjin Laser Technology Co.,Ltd.,Wuhan 430206,Hubei,China)

机构地区：[1]华中科技大学武汉光电国家研究中心,湖北武汉430074 [2]武汉长进光子技术股份有限公司,湖北武汉430206

出　　处：《中国激光》2024年第13期184-190,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61975061)。

摘　　要：现有骨干网的流量需求急剧上升,拓展传输波段是提升现有光纤通信系统容量最直接有效的方式。其中,光纤放大技术是实现超宽带宽、超大容量、超长距离传输的关键。基于铒镱共掺光纤仿真模型,通过优化铒离子与镱离子的掺杂比例,实现了放大性能的提升。通过改进的化学气相沉积工艺,成功制备了铒镱共掺光纤,并研究了其L波段的放大性能。实验结果显示,在单级前向泵浦结构下,当输入信号功率为-15 dBm、包层泵浦功率为3 W时,该光纤的20 dB增益带宽为1565~1625 nm(60 nm)。证明了940 nm多模泵浦方案有助于实现更高的电光效率和更好的泵浦温漂稳定度。Objective In the Internet of Everything era, with the rapid development of the fifth generation mobile communication technology(5G), the traffic demand in current optical communication systems shows a rapid growth trend. However, the transmission capacity in the C-band, which is the conventional band, is insufficient to satisfy continuous requirements. Exploring new bandwidths is considered the most direct and effective solution for achieving capacity enhancement. Erbium-doped fiber(EDF) amplifiers, which are commonly used to compensate for losses, play a crucial role in achieving ultra-wideband, super-large capacity, and ultralong-distance transmission. These amplifiers rely heavily on EDF, which have prompted extensive research to realize an efficient broadband amplification performance. However, most reported EDFs utilize a core-pumping scheme that relies on low electro-optical efficiency and expensive single-mode laser diodes(LD). If the multimode pumped fiber, adopting multimode LD with high electro-optical efficiency and cost-effectiveness, performs comparably with existing commercial single-mode pumped fiber, then researching multimode pumped EDF provides a feasible method to expand the bandwidth and increase the transmission capacity.Methods A cladding-pumping scheme using a multimode LD, known for its high power, has been extensively utilized in highpower fiber lasers. However, in the realm of fiber amplifiers for communication systems, the cladding-pumping scheme encounters the challenge of low optical pump efficiency owing to low pumping absorption. To address this issue, ytterbium is introduced into the EDF as a sensitizer to cross-relax with erbium, which enhances the pumping rate of erbium ions. Furthermore, phosphor-silicate glass is adopted to further inhibit the back-energy transfer from erbium to ytterbium and suppress the signal excited-state absorption.Using modeling based on the power propagation and rate equations, the doping ratio of ytterbium and erbium ions is optimized and verified to en

关 键 词：光纤通信 铒镱共掺光纤 包层泵浦 宽带放大 

分 类 号：TN913.7[电子电信—通信与信息系统]