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

• 作 者: 李连煌 郭福源
• 机 构: Institute of Laser and Optoelectronics Technology,Fujian Provincial Key Laboratory for Photonics Tec
• 出 处: Chinese Physics B
• 发表日期: 2009年06期
• 关键词: matching normalized approximate maximal waveguide furthermore symmetric eigen fo

This paper analyzes the characteristic of matching effciency 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 effciency method. The relationship between the mode-field half-width of the Gaussian approximate field obtained from the maximal matching effciency and normalized frequency is studied; furthermore, two formulas of mode-field half-widths as a function of normalized frequency are proposed.

This paper analyzes the characteristic of matching effciency 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 effciency method. the relationship between the mode-field half-width of the Gaussian approximate field obtained from the maximal matching effciency and normalized frequency is studied; two formulas of mode-field half-widths as a function of normalized frequency are proposed.