中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2398-2403.doi: 10.1088/1674-1056/18/6/047

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Mode-field half widths of Gaussian approximation for fundamental mode of two kinds of optical waveguides

李连煌, 郭福源   

  1. Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
  • 收稿日期:2008-09-23 修回日期:2009-01-15 出版日期:2009-06-20 发布日期:2009-06-20
  • 基金资助:
    Project supported by Natural Science Foundation of the Department of Science {\&} Technology of Fujian Province of China (Grant No 2007F5040).

Mode-field half widths of Gaussian approximation for the fundamental mode of two kinds of optical waveguides

Li Lian-Huang(李连煌)† and Guo Fu-Yuan (郭福源)   

  1. Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
  • Received:2008-09-23 Revised:2009-01-15 Online:2009-06-20 Published:2009-06-20
  • Supported by:
    Project supported by Natural Science Foundation of the Department of Science {\&} Technology of Fujian Province of China (Grant No 2007F5040).

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摘要： This paper analyzes the characteristic of matching efficiency between the fundamental mode of two kinds of optical waveguides and its Gaussian approximate field.Then, it presents a new method where the mode-field half-width of Gaussian approximation for the fundamental mode should be defined according to the maximal matching efficiency method. The relationship between the mode-field half-width of the Gaussian approximate field obtained from the maximal matching efficiency and normalized frequency is studied; furthermore, two formulas of mode-field half-widths as a function of normalized frequency are proposed.

关键词: mode-field half-width, Gaussian approximation, normalized frequency, optical waveguide

Abstract: This paper analyzes the characteristic of matching efficiency between the fundamental mode of two kinds of optical waveguides and its Gaussian approximate field.Then, it presents a new method where the mode-field half-width of Gaussian approximation for the fundamental mode should be defined according to the maximal matching efficiency method. The relationship between the mode-field half-width of the Gaussian approximate field obtained from the maximal matching efficiency and normalized frequency is studied; furthermore, two formulas of mode-field half-widths as a function of normalized frequency are proposed.

Key words: mode-field half-width, Gaussian approximation, normalized frequency, optical waveguide

中图分类号:  (Nonlinear waveguides)

  • 42.65.Wi
42.79.Gn (Optical waveguides and couplers)