A modified ray-optic method for arbitrary dielectric waveguides

Author

Qiao, Li ; Wang, Jingyi

Author_Institution

Dept. of Phys., Northern Jiaotong Univ., Beijing, China

Volume

28

Issue

12

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

2721

Lastpage

2727

Abstract

A modified ray-optic method (MRO) is proposed for evaluating the propagation characteristics of dielectric waveguides with arbitrary refractive index profile. The authors correct the error caused by assuming a constant phase shift for any mode at the turning point on the substrate side. Very simple formulas are given for calculating the dispersion characteristics including those for planar optical waveguides and single-mode fibers. The results are more accurate than those of the ordinary ray-optic method, especially in the near cutoff regions, and agree well with those of the exact numerical methods. A comparison with other analytical and the exact numerical methods shows that the proposed method is simpler than other methods. This method can be extended to other more complicated cases

Keywords

optical dispersion; optical waveguide theory; ray tracing; refractive index; arbitrary dielectric waveguides; arbitrary refractive index profile; constant phase shift; dispersion characteristics; modified ray-optic method; near cutoff regions; planar optical waveguides; propagation characteristics; single-mode fibers; substrate; Dielectric substrates; Error correction; Optical planar waveguides; Optical propagation; Optical refraction; Optical variables control; Optical waveguides; Planar waveguides; Refractive index; Turning;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.166465

Filename

166465