Title :
Analytical expressions of the guided mode field distribution: analysis and comparison
Author :
Zhu, Ning Hua ; Lin, Yi Kun ; De Wu, Zheng ; Lin, Weigan
Author_Institution :
Electron. Dept., Zhongshan Univ., Guangdong, China
fDate :
6/1/1992 12:00:00 AM
Abstract :
Methods for determining the parameters of the three different approximate solutions for the fundamental mode field distribution of Ti:LiNbO3 optical waveguides by using the variational technique are presented. This analysis gives closer approximation not only to the field distribution, but also to the propagation constant. Comparison with the exact results for the exponential index distribution in depth shows that these trial functions are closer to the real solution. It is also shown that these solutions are as accurate as the effective index method for Ti:LiNbO3 strip waveguides. The analysis provides an approach for comparing and assessing these solutions
Keywords :
approximation theory; integrated optics; lithium compounds; optical waveguide theory; refractive index; titanium; variational techniques; LiNbO3:Ti; approximate solutions; effective index method; exponential index distribution; fundamental mode; guided mode field distribution; optical waveguides; planar waveguides; propagation constant; strip waveguides; variational technique; Design optimization; Equations; Optical design; Optical devices; Optical refraction; Optical variables control; Optical waveguide components; Optical waveguides; Propagation constant; Refractive index;
Journal_Title :
Quantum Electronics, IEEE Journal of
