ASYMPTOTIC EVALUATION OF NORMALIZED CUT-OFF FREQUENCIES OF AN OPTICAL-WAVEGUIDE WITH QUADRATIC INDEX VARIATION

被引：9

作者：

ARNOLD, JM ^{[1
]}

机构：

[1] UNIV LONDON,QUEEN MARY COLL,DEPT ELECT & ELECTR ENGN,LONDON E1 4NS,ENGLAND

来源：

IEE JOURNAL ON MICROWAVES OPTICS AND ACOUSTICS | 1977年 / 1卷 / 06期

关键词：

D O I：

10.1049/ij-moa.1977.0027

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Asymptotic expressions for normalized cut-off frequencies of modes having large meridional order n and small azimuthal order m are obtained for an inhomogeneous waveguide having quadratic index variation. A fractional integral technique is used to construct solutions directly from the differential equation in the form of an integral representation, which is expanded by the steepest-descent procedure.

引用

页码：203 / 208

页数：6