Title :
Low-loss arrayed-waveguide grating with high index regions at slab-to-array interface
Author :
Maru, K. ; Chiba, T. ; Okawa, M. ; Ishikawa, H. ; Ohira, K. ; Sato, S. ; Uetsuka, H.
Author_Institution :
Optoelectron. Syst. Lab., Hitachi Ltd., Ibaraki, Japan
fDate :
10/11/2001 12:00:00 AM
Abstract :
A novel structure is proposed to reduce the transition loss of an arrayed-waveguide grating. The structure comprises high refractive-index regions formed at the core of slab waveguides in the vicinity of an array with ultraviolet (UV) irradiation. The insertion loss was reduced by 3.0 dB after UV irradiation. The minimum insertion loss became 2.1 dB, which includes fibre-to-chip loss of ~0.8 dB
Keywords :
diffraction gratings; optical arrays; optical communication equipment; optical losses; optical waveguide components; refractive index; ultraviolet radiation effects; 0.8 dB; 2.1 dB; UV irradiation; array; arrayed-waveguide grating; fibre-to-chip loss; high index regions; high refractive-index regions; insertion loss; low-loss arrayed-waveguide grating; minimum insertion loss; slab waveguides; slab-to-array interface; transition loss; ultraviolet irradiation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010870
