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Generation of doughnutlike vortex beam with tunable orbital angular momentum from lasers with controlled Hermite-Gaussian modes

机译:受控Hermite-Gaussian模产生的具有可调谐轨道角动量的环形辐射涡旋光束

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This study demonstrates successive higher-order Hermite-Gaussian (HG(0,m)) mode operations in a microchip solid-state laser with a controlled off-axis laser diode (LD) pumping and generation of the corresponding doughnutlike laser beam of tunable ring diameter and orbital angular momentum, by experimentally focusing a Hermite-Gaussian mode (HGM) lasing beam into an astigmatic mode converter (AMC) with a mode-matching lens. Based on the successful generation of stable doughnutlike vortex beams by combining the LD off-axis pumping of microchip lasers and an AMC, this study proposes a design for a compact, solid doughnutlike vortex laser beam generator that combines three elements (i.e., laser cavity, mode-matching lens, and AMC) into one practical device. The desired doughnutlike vortex beam with different orbital angular momentum is easily generated by simply controlling the lateral off-axis pump position and pump beam shape on the laser crystal by numerical simulation. (c) 2008 Optical Society of America.
机译:这项研究证明了在具有受控离轴激光二极管(LD)泵浦的微芯片固态激光器中连续的高阶Hermite-Gaussian(HG(0,m))模式操作以及可调谐环的环形辐射状激光束的产生通过实验将Hermite-Gaussian模式(HGM)激光束聚焦到带有模式匹配透镜的像散模式转换器(AMC)中来获得直径和轨道角动量。基于通过结合微芯片激光器的LD离轴泵浦和AMC成功产生稳定的甜甜圈状涡旋光束的基础上,本研究提出了一种紧凑,坚固的甜甜圈状涡旋激光束发生器的设计,该发生器结合了三个要素(即激光腔,模式匹配镜头和AMC)集成到一个实用设备中。通过简单地通过数值模拟控制横向离轴泵浦位置和激光晶体上的泵浦光束形状,就可以轻松地生成所需的具有不同轨道角动量的环形涡旋光束。 (c)2008年美国眼镜学会。

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