| 非稳腔主动式直接获取纳秒近似无衍射贝塞尔绿光 |
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| 引用本文： | 马宝田,吴逢铁,马亮.非稳腔主动式直接获取纳秒近似无衍射贝塞尔绿光[J].物理学报,2010,59(9):6213-6218. |
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| 作者姓名： | 马宝田 吴逢铁 马亮 |
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| 作者单位： | 华侨大学信息科学与工程学院,泉州 362021 |
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| 基金项目： | 国家自然科学基金(批准号:60977068)和泉州市科技重点项目(批准号:2009G4)资助的课题. |
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| 摘 要： | 通过对基于轴棱锥的贝塞尔谐振腔和贝塞尔-高斯谐振腔的研究,设计了一台腔内倍频Nd:YAG纳秒近似无衍射贝塞尔绿光激光器. 非稳激光器谐振腔由轴棱锥和凸面镜组成. 实验采用单灯脉冲抽运激光增益介质Nd:YAG晶体,倍频晶体选用KTP. 当抽运电压为350 V时,由主动式直接产生纳秒近似零阶贝塞尔绿光,其脉冲宽度为55.1 ns,波长为532 nm,线宽为0.8 nm,近似无衍射零阶贝塞尔绿光的中心光斑直径为192 μm. 利用Fresnel-Kirchhoff 衍射积分和Fox-Li迭代法,通过数值计算得出
关键词：
主动式
纳秒贝塞尔光束
腔内倍频
轴棱锥
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| 关 键 词： | 主动式 纳秒贝塞尔光束 腔内倍频 轴棱锥 |
| 收稿时间： | 2009-04-30 |
Nanosecond non-diffracting Bessel green beam generated directly from an unstable resonator by active method |
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| Ma Bao-Tian,Wu Feng-Tie,Ma Liang.Nanosecond non-diffracting Bessel green beam generated directly from an unstable resonator by active method[J].Acta Physica Sinica,2010,59(9):6213-6218. |
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| Authors: | Ma Bao-Tian Wu Feng-Tie Ma Liang |
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| Institution: | College of Information Science and Engineering, Huaqiao University, Quanzhou 362021, China;College of Information Science and Engineering, Huaqiao University, Quanzhou 362021, China;College of Information Science and Engineering, Huaqiao University, Quanzhou 362021, China |
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| Abstract: | An intracavity frequency-doubled Nd∶YAG nanosecond Bessel green laser is designed in an axicon-based Bessel and Bessel-Gaussian resonator. The unstable laser resonator is composed of a refraction axicon and a convex mirror. The gain medium Nd∶YAG rod is pumped by a single flash-lamp which is working in a pulsed mode and a KTP crystal is used for intracavity second-harmonic generation. Nanosecond Bessel green beam is generated directly from the laser by active method when pumping voltage is 350 V. The pulse with width of 55.1 ns, central wavelength at 532 nm, spectral line width of 0.8 nm and diameter of central spot of 192 μm is obtained. Fresnel-Kirchhoff diffraction integral and the Fox-Li algorithm is used to extract the dominant mode of the cavity and the experimental results are consistent with those of the numerical simulation. |
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| Keywords: | active method nanosecond Bessel beam intracavity frequency-doubling axicon |
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