Title :
Asymptotic analysis of mode transition in general class of circular hollow waveguides at the infrared frequency
Author :
Kato, Yuji ; Miyagi, Mitsunobu
Author_Institution :
Dept. of Electr. Commun., Fac. of Eng., Sendai, Japan
fDate :
4/1/1993 12:00:00 AM
Abstract :
The correspondence between hybrid modes in small- and large-core, circular, hollow waveguides is discussed, using an asymptotic theory for the infrared. Mode changes or mode transitions in several hollow waveguides which depend on the cladding material and the mode order are discussed. For dielectric-coated metallic waveguides, mode changes also depend on the thickness of the coating. For singly cladded hollow waveguides, the region where the mode changes is shown to be in the plane of the complex refractive index (n-jk) of the cladding material, where the HE1-mode in large-core waveguides approaches the TE or TM mode
Keywords :
circular waveguides; optical waveguide theory; refractive index; HE1-mode; TE mode; TM mode; asymptotic theory; circular hollow waveguides; cladding material; coating thickness; complex refractive index; dielectric-coated metallic waveguides; general class; hybrid modes; infrared frequency; large-core waveguides; mode order; mode transition; singly cladded hollow waveguides; Dielectrics; Equations; Hollow waveguides; Laser modes; Planar waveguides; Refractive index; Tellurium; Waveguide lasers; Waveguide theory; Waveguide transitions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
