Low Birefringence and 2-D Optical Confinement of Hollow Waveguide With Distributed Bragg Reflector and High-Index-Contrast Grating

Author

Kumar, Mukesh ; Chase, Chris ; Karagodsky, Vadim ; Sakaguchi, Takahiro ; Koyama, Fumio ; Chang-Hasnain, Connie J.

Author_Institution

Microsyst. Res. Center, Tokyo Inst. of Technol., Yokohama, Japan

Volume

1

Issue

2

fYear

2009

Firstpage

135

Lastpage

143

Abstract

A hollow optical waveguide is proposed in which light can be confined in an air gap between a distributed Bragg reflecting (DBR) mirror and a high-index-contrast grating (HCG) mirror. Because of the combined effect of vertical (DBR) and lateral (HCG) periodicity, the proposed hollow waveguide shows a small modal birefringence on the order of 10^-4 . In addition, a patterned HCG is shown to provide 2-D optical confinement, which is an important requirement for practical compact photonic devices. The proposed hollow waveguide is fabricated, and a low birefringence of 5 times 10^-4 is demonstrated experimentally.

Keywords

birefringence; diffraction gratings; distributed Bragg reflectors; integrated optics; optical waveguides; 2-D optical confinement; birefringence; distributed Bragg reflector; high-index-contrast grating; high-index-contrast grating mirror; hollow waveguide; lateral periodicity; vertical periodicity; Birefringence; Bragg gratings; Distributed Bragg reflectors; Hollow waveguides; Mirrors; Optical attenuators; Optical refraction; Optical sensors; Optical waveguides; Photonics; Integrated photonics; gratings; optical devices; waveguides;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2009.2027027

Filename

5159512