Title :
Numerical analysis of the whispering gallery regime in open waveguide micro-bends
Author :
Stabile, R. ; Williams, K.A.
Author_Institution :
Inter-Univ. Inst. COBRA on Commun. Technol., Eindhoven Univ. of Technol., Eindhoven, Netherlands
Abstract :
We analyse the transition from single mode waveguiding through to the whispering gallery regime in open waveguide micro-bends. 2D FDTD simulations reveal a critical sensitivity of bend loss and waveguiding properties to waveguide width. Vectorial mode-solver analysis identifies a regime of significant and deleterious mode mixing, even for structures operating within the whispering gallery caustic radius. Careful choice in dimensions can however lead to highly fabrication tolerant microbends with a loss variation of order ±0.01dB for a waveguide variation of ±100 nm.
Keywords :
finite difference time-domain analysis; numerical analysis; optical waveguides; whispering gallery modes; 2D FDTD simulations; bend loss; critical sensitivity; mode mixing; numerical analysis; open waveguide micro-bends; vectorial mode-solver analysis; waveguide width; waveguiding properties; whispering gallery regime; Finite difference methods; Optical device fabrication; Optical resonators; Optical waveguides; Time domain analysis; Whispering gallery modes;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices (NUSOD), 2011 11th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-61284-876-1
Electronic_ISBN :
2158-3234
DOI :
10.1109/NUSOD.2011.6041195
