Title :
Quantitative Analysis of a Flat-Top Planar Waveguide Demultiplexer
Author :
Lin, Chun-Ting ; Huang, Yang-Tung ; Huang, Jung-Yaw
Author_Institution :
Dept. of Photonics, Nat. Chiao Tung Univ., Hsinchu
fDate :
3/1/2009 12:00:00 AM
Abstract :
A three-focal-point method is used for the design of a flat-top planar waveguide concave grating. With the Gaussian approximation a modified formula is proposed and is compared with the numerical model of the scalar diffraction theory by using a design example. The sources of loss caused by the flat-top design and the grating are taken into consideration. The optimal separation between the two outmost focal points is obtained and the spectral response of the demultiplexer with a ripple below 0.04 dB is achieved.
Keywords :
demultiplexing equipment; diffraction gratings; optical planar waveguides; Gaussian approximation; concave grating; flat top planar waveguide demultiplexer; flat-top design; optimal separation; quantitative analysis; scalar diffraction theory; spectral response; three focal point method; Arrayed waveguide gratings; Gaussian approximation; Optical crosstalk; Optical fiber devices; Optical fiber networks; Optical planar waveguides; Optical waveguides; Planar waveguides; Semiconductor waveguides; Wavelength division multiplexing; Concave grating; flat-top; planar waveguide; three-focal-point method; wavelength-division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.2004932
