Title :
Distributed Etched Diffraction Grating Demultiplexer With Flat-Top Insertion Loss Envelope
Author :
Jafari, Amir ; Kirk, Andrew
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada
Abstract :
It is numerically shown that incorporation of a distributed Bragg reflector at the facets of an etched diffraction grating (EDG) can be used to tailor the output spectral response of the device. This technique is used to optimize the overall insertion loss envelope of a distributed etched diffraction grating (DEDG) demultiplexer to improve the output channel uniformity. Numerical results are presented for the transverse electric (TE) polarization, where a channel uniformity of 0.45 dB over 43-nm bandwidth is achieved. A finite-difference time-domain (FDTD) method in combination with perfectly matched layers (PMLs) and periodic boundary condition (PBC) is used to calculate the insertion loss envelope of device.
Keywords :
Bragg gratings; demultiplexing equipment; distributed Bragg reflectors; etching; integrated optics; light polarisation; optical communication equipment; optical fabrication; optical losses; optimisation; telecommunication channels; FDTD method; channel uniformity; distributed Bragg reflector; distributed etched diffraction grating demultiplexer; finite-difference time-domain method; flat-top insertion loss envelope; numerical analysis; optimization; perfectly matched layers; periodic boundary condition; transverse electric polarization; Arrayed waveguide gratings; Bandwidth; Diffraction; Diffraction gratings; Distributed Bragg reflectors; Insertion loss; Reflectivity; Distributed Bragg reflector (DBR); etched diffraction grating demultiplexer; waveguide devices;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2011.2162823
