Title :
Low-loss flat-top passband arrayed waveguide gratings realised by first-order mode assistance method
Author :
Kohtoku, M. ; Takahashi, H. ; Kitoh, T. ; Shibata, T. ; Inoue, Yasuyuki ; Hibino, Y.
Author_Institution :
NTT Photonics Labs., NTT Corp., Kanagawa, Japan
fDate :
7/18/2002 12:00:00 AM
Abstract :
A novel method of flattening the passband of an arrayed waveguide grating with a small excess loss is described, which employs a new concept that uses the assistance of the weak first-order mode. A 16-channel 100 GHz-spacing demultiplexer with a fibre-to-fibre loss of less than 3.6 dB and a flattened excess loss of 1.85 dB is demonstrated. The 1 dB down passband is widened 2.2 times
Keywords :
demultiplexing equipment; diffraction gratings; integrated optics; optical arrays; optical losses; optical waveguide components; 1 dB down passband; 1.85 dB; 16-channel demultiplexer; 3.6 dB; fibre-to-fibre loss; first-order mode assistance method; flattened excess loss; low-loss flat-top passband arrayed waveguide gratings; passband flattening; small excess loss; weak first-order mode;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20020533
