强激光与粒子束2026，Vol.38Issue(11)：193-198,6.DOI:10.11884/HPLPB202638.250469
基于离轴泵浦与腔外模式转换的高阶可调谐厄米-高斯与拉盖尔-高斯激光研究
Research on high-order tunable Hermite-Gaussian and Laguerre-Gaussian lasers based on off-axis pumping and external cavity mode conversion
摘要
Abstract
[Background]Hermite-Gaussian(HG)beams are fundamental orthogonal solutions of stable optical resonators,and their efficient conversion to Laguerre-Gaussian(LG)vortex beams provides an effective way to generate high-order vortex light.However,the direct intracavity generation of LG beams commonly suffers from chiral superposition and poor controllability,which limits its practical applications.[Purpose]This paper aims to propose a scheme to achieve high-order tunable HG and LG laser output with stable chiral control,to address the chiral superposition problem of directly generated LG beams.[Methods]An 808 nm fiber-coupled laser diode was used to pump the Nd:YVO4 crystal in a plano-concave resonator.The pitch and tilt angles of the input mirror were precisely adjusted to realize off-axis pumping.A π/2 astigmatic mode converter composed of a pair of cylindrical lenses was adopted for external-cavity mode conversion.The orbital angular momentum and chirality of LG beams were verified by a Mach-Zehnder interferometer.[Results]Continuously tunable HG0,n(1st to 68th order)and HG1,n(1st to 46th order)modes were obtained.The HG modes were efficiently converted into LG0,1 to LG0,68 vortex beams.The chiral symmetry flipping of LG0,1/LG0,-1 and LG0,68/LG0,-68 was realized by reversely adjusting the input mirror angles.[Conclusions]The proposed scheme combines the high-order tunability of HG modes and the chiral controllability of LG modes without intracavity chiral elements,providing a flexible and reliable technical approach for the practical application of high-order vortex lasers.关键词
厄米-高斯模式/拉盖尔-高斯模式/离轴泵浦/轨道角动量/模式转换Key words
Hermite-Gaussian mode/Laguerre-Gaussian mode/off-axis pumping/orbital angular momentum/mode conversion分类
信息技术与安全科学引用本文复制引用
张子涵,许天钰,杨堰渟,沈佳,余晓文,张栋,段延敏,朱海永..基于离轴泵浦与腔外模式转换的高阶可调谐厄米-高斯与拉盖尔-高斯激光研究[J].强激光与粒子束,2026,38(11):193-198,6.基金项目
国家自然科学基金项目(62475197、62275200) （62475197、62275200）
浙江省教育厅科研项目(Y202352806) （Y202352806）
温州大学大学生创新创业训练计划项目 （）
