强激光与粒子束2025，Vol.37Issue(9)：1-3,3.DOI:10.11884/HPLPB202537.250287
简单MOPA结构在1035nm波段实现2kW近单模输出
Simple MOPA fiber laser achieved 2 kW near-single-mode output at 1035 nm
摘要
Abstract
[Background]The 1035 nm short-wavelength-band fiber laser serves as a critically important light source with extensive and growing applications across numerous advanced technological fields.Its unique spectral properties make it highly suitable for spectral beam combining(SBC),nonlinear frequency conversion,and high-resolution lidar systems.However,the power scaling of 1035 nm fiber lasers has long been constrained by the amplified spontaneous emission(ASE)effect.This phenomenon has historically impeded significant progress,with the output power from conventional master oscillator power amplifier(MOPA)configurations remaining confined below 2 kW,creating a bottleneck for higher-performance applications.[Purpose]To realize high-power,high-brightness laser output in the 1035 nm band,we designed and constructed a counter-pumped MOPA fiber laser.[Methods]The system's performance was enhanced through multi-parameter optimization,including optimizing the temporal characteristics of the fiber seed source,the bending and coiling parameter of the gain fiber in the amplifier stage,and refining the backward pump scheme.[Results]Finally,when the seed laser power was 24 W and the total pump power was 2.9 kW,a maximum output power of over 2 kW was reached,and the corresponding optical-to-optical conversion efficiency of the amplifier stage was approximately 69.5%.At the maximum output power,the ASE suppression ratio was measured to be around 32 dB,indicating effective control over noise.Furthermore,the beam quality factors were measured to be M2x=1.33 and M2y=1.22,confirming near-diffraction-limited,single-mode operation,and high spatial beam quality.[Conclusions]The results represent a significant stride forward in the power scaling of high-brightness 1035 nm fiber lasers.Next research will focus on further elevating the output power and beam quality by implementing seed source with more stable temporal characteristics and optimizing the overall fiber laser structure to mitigate ASE and other nonlinear effects.关键词
掺镱光纤激光器/短波光纤激光器/放大自发辐射Key words
ytterbium-doped fiber laser/short-wavelength fiber laser/amplified spontaneous emission分类
数理科学引用本文复制引用
王鹏,杨成,吴函烁,叶云,奚小明,张汉伟,王小林,习锋杰..简单MOPA结构在1035nm波段实现2kW近单模输出[J].强激光与粒子束,2025,37(9):1-3,3.基金项目
长沙市杰出创新青年培养计划项目(kq2406002) （kq2406002）
国防科技大学自主创新科学基金项目(25-ZZCX-XXXJS-3) （25-ZZCX-XXXJS-3）
国防科技大学自主科研项目(202301-XXGC-XX-045) （202301-XXGC-XX-045）
