国产掺镱保偏光纤的制备及其激光性能研究  

Preparation of Domestic Ytterbium-Doped Polarization-Maintaining Fiber and Study of Its Laser Properties

作　　者：廖世彪 罗涛 肖润珩 邢颍滨 褚应波 彭景刚 李海清 李进延 戴能利 Liao Shibiao;Luo Tao;Xiao Runheng;Xing Yingbin;Chu Yingbo;Peng Jinggang;Li Haiqing;Li Jinyan;Dai Nengli(Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,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

出　　处：《中国激光》2023年第5期20-24,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(11875139)。

摘　　要：基于改进的化学气相沉积(MCVD)工艺,结合溶液掺杂技术,成功制备出11µm/125µm掺镱保偏光纤,并研究了其激光性能。该光纤的纤芯数值孔径为0.09,双折射系数值为3.0×10^(-4),915 nm和976 nm处的包层吸收系数分别为2.48 dB/m和7.05 dB/m。搭建了全光纤振荡器结构测试平台,当掺镱保偏光纤长度为2.25 m、976 nm泵浦功率为57 W时,实现了最大输出功率为48.9 W、斜率效率为85.5%的激光输出,输出光谱呈洛伦兹型。Objective Since the 1990s,fiber lasers have been widely used in the medical,communications,national defense,and industrial processing fields because of their allsolid state,high efficiency,high reliability,and high beam quality.At present,in the 1µm band,the output power of a singlelink ytterbiumdoped continuous fiber laser exceeds 20 kW,and there is a theoretical limit to further increases in this power.Most studies on highpower fiber lasers have focused on randomly polarized ytterbiumdoped fiber lasers.However,the development of longdistance laser communication,coherent detection,highpower beam coherent synthesis,and other applications has higher requirements for laser power,linewidth,polarization state,and other properties.Obtaining a highpower,narrowlinewidth,and high polarization extinction ratio fiber laser output has become the focus and research direction in the field of highpower fiber lasers.The most important part of a highpower narrowlinewidth linearly polarized fiber laser is the ytterbiumdoped polarizationmaintaining fiber,which provides gain.In this study,based on a modified chemical vapor deposition(MCVD)process combined with solution doping technology,a ytterbiumdoped polarizationmaintaining fiber is successfully fabricated.The polarization extinction ratio(PER)is determined by using an extinction ratio tester.An allfiber oscillator structure test platform is built,and the performance,polarization characteristics,and linewidth performance of the ytterbiumdoped polarizationmaintaining fiber lasers are studied.Methods In this study,a 11µm/125µm ytterbiumdoped polarizationmaintaining fiber(PMYDF)was fabricated using the MCVD process combined with solution doping technology.Using existing MCVD machine tool equipment in the laboratory,the preform was prepared after etching,deposition,liquidphase doping,drying,vitrification,collapse,and burning.Two holes were drilled symmetrically along the fiber core in the cladding region of the preform,and a borondoped lowrefractiveindex quartz rod was placed in

关 键 词：激光光学 光纤光学 光纤激光振荡器 光纤测试 掺镱保偏光纤 

分 类 号：O436[机械工程—光学工程]