Concept of multiorder multimode resonant optical filters

Author

Liu, Z.S. ; Magnusson, R.

Author_Institution

Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA

Volume

14

Issue

8

fYear

2002

Firstpage

1091

Lastpage

1093

Abstract

The idea of implementing optical filters by coupling evanescent waves from several diffracted orders into multiple leaky waveguide modes is studied theoretically. Using a dielectric thin-film structure consisting of a coupling grating placed between adjacent waveguides, guided-mode resonance filters exhibiting multiple reflection peaks within a specified wavelength range can be obtained. These peaks originate in the resonant waveguide modes that are excited by the diffracted waves dispersed by the grating. It is shown that this device can be used to realize multiwavelength as well as wide-band spectral filters.

Keywords

band-stop filters; dielectric thin films; diffraction gratings; optical couplers; optical films; optical waveguide filters; coupling grating; dielectric thin-film structure; diffracted orders; diffracted waves; evanescent wave coupling; grating; guided-mode resonance filters; multiorder multimode resonant optical filters; multiple leaky waveguide modes; multiple reflection peaks; multiwavelength filters; resonant waveguide modes; wavelength range; wide-band spectral filters; Dielectric thin films; Diffraction gratings; Optical coupling; Optical diffraction; Optical filters; Optical reflection; Optical waveguide theory; Optical waveguides; Resonance; Wideband;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2002.1021979

Filename

1021979