Novel Grating Design for Out-of-Plane Coupling With Nonuniform Duty Cycle

Author

Yang, Jeong Su ; O, Beom-Hoan ; Hong, Sung Hoon ; Lee, Seung Gol ; Park, Se-Geun ; Kim, Joo-Hee ; Chung, Duck-Jin ; Chang, Sung-Pil ; Lee, El-Hang

Author_Institution

Inha Univ., Incheon

Volume

20

Issue

9

fYear

2008

fDate

5/1/2008 12:00:00 AM

Firstpage

730

Lastpage

732

Abstract

We propose a waveguide grating coupler with nonuniform duty cycle for the out-of-plane coupling of light from a planar waveguide to an optical fiber, and evaluate the optical performances based on Bloch-wave analysis. The mode profile and focusing performance of the diffracted output beam are investigated in terms of the duty cycle to improve optical coupling efficiency.

Keywords

diffraction gratings; light diffraction; optical fibre couplers; optical focusing; optical planar waveguides; Bloch-wave analysis; diffracted output beam; duty cycle; focusing performance; grating design; mode profile; optical coupling efficiency; optical fiber; out-of-plane coupling; planar waveguide; waveguide grating coupler; Coupling circuits; Diffraction gratings; Optical coupling; Optical diffraction; Optical fibers; Optical planar waveguides; Optical waveguides; Performance analysis; Planar waveguides; Silicon; Bloch-wave analysis; focusing performance; nonuniform duty cycle; optical coupling; waveguide grating coupler;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.921083

Filename

4481172