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)
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
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.
Received: 23 September 2008
Revised: 15 January 2009
Accepted manuscript online:
Fund: Project supported
by Natural Science Foundation of the Department of Science {\&}
Technology of Fujian Province of China (Grant No 2007F5040).
Cite this article:
Li Lian-Huang(李连煌) and Guo Fu-Yuan (郭福源) Mode-field half widths of Gaussian approximation for the fundamental mode of two kinds of optical waveguides 2009 Chin. Phys. B 18 2398
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