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

• 来源期刊: 中国物理B（英文版）
• 关键词: mode-field half-width Gaussian approximation normalized frequency optical waveguide
• 年，卷（期）: 2009,（6）
• 页码范围: 2398-2403
• 页数: 6页
• 语种: 英文

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.