Title :
Aberration theory of arrayed waveguide grating
Author :
Wang, Daoyi ; Jin, Guofan ; Yan, Yingbai ; Wu, Minxian
Author_Institution :
Dept. of Precision Instrum., Tsinghua Univ., Beijing, China
fDate :
2/1/2001 12:00:00 AM
Abstract :
The general aberration theory of arrayed waveguide grating (AWG) is proposed in this paper. The derived conclusions can be applied to any symmetrical AWGs. With the aberration theory, the spectral response can be optimized. Some performances of an AWG, for example, crosstalk and channel number, are expected to be improved by reducing the aberrations. A common AWG with the Rowland geometry has low aberrations for the absence of the second-order aberration. To further reduce the aberrations, nonstandard AWGs are considered. The AWG based on three stigmatic points is proved to have a perfect performance
Keywords :
diffraction gratings; optical arrays; optical waveguide theory; optical waveguides; optimisation; symmetry; Rowland geometry; aberration theory; arrayed waveguide grating aberration theory; channel number; crosstalk; low aberrations; second-order aberration; spectral response optimisation; stigmatic points; symmetrical AWG; Arrayed waveguide gratings; Crosstalk; Filters; Geometry; Instruments; Optical arrays; Optical coupling; Optical waveguides; Waveguide theory; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
