A one-dimensional fiber grating coupler is derived from a waveguide with random etches using implementations of particle swarm and genetic algorithms. The resulting gratings yield a theoretical coupling efficiency of up to 1.1 dB and prompt clear design rules for the layout of highly efficient fiber grating couplers.
© 2014 Optical Society of America
Diffraction and Gratings
Original Manuscript: January 28, 2014
Revised Manuscript: April 25, 2014
Manuscript Accepted: April 25, 2014
Published: May 23, 2014
Benjamin Wohlfeil, Lars Zimmermann, and Klaus Petermann, "Optimization of fiber grating couplers on SOI using advanced search algorithms," Opt. Lett. 39, 3201-3203 (2014)