Title :
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
fDate :
5/1/2008 12:00:00 AM
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.921083
