应用光学, 2010, 31 (4): 652, 网络出版: 2011-02-15  

非傍轴洛伦兹光束的传输特性研究

Propagation properties of non-paraxial Lorentz beam
作者单位
江苏大学机械工程学院光信息科学与技术系, 江苏 镇江 212013
摘要
基于光强二阶矩理论, 推导出非傍轴洛伦兹光束的远场发散角、近场发散角、束腰宽度以及光束传输因子的解析表达式, 并通过数值模拟, 得到它们与对应束腰宽度以及波长的关系。结果表明: 与非傍轴高斯光束相比, 在满足二极管激光器物理机制的条件下, 非傍轴洛伦兹光束更符合二极管激光束的实际情况, 因此, 非傍轴洛伦兹光束更适用于描述二极管激光器等光源尺寸小且发散程度较大的激光光源。
Abstract
Based on the theory of the second intensity moment, the results of the far-field divergence angle, near-field divergence angle, waist width and beam propagation factor of non-paraxial Lorentz beam are derived, and the relationship of them versus the corresponding waist width and the wavelength is studied. The result indicates that, compared with the non-paraxial Gaussian beam, under the condition of satisfying physical mechanism of diode laser, the non-paraxial Lorentz beam is more appropriate with the actual situations of diode laser beam. Accordingly, the non-paraxial Lorentz beam is a more appropriate model to describe laser sources with small size and high divergence such as diode laser.
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张悦, 段其强, 陈献亚, 丁桂林. 非傍轴洛伦兹光束的传输特性研究[J]. 应用光学, 2010, 31(4): 652. ZHANG Yue, DUAN Qi-qiang, CHEN Xian-ya, DING Gui-lin. Propagation properties of non-paraxial Lorentz beam[J]. Journal of Applied Optics, 2010, 31(4): 652.

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