Efficient input and output fiber coupling to a photonic crystal waveguide.
The efficiency of evanescent coupling between a silica optical fiber taper and a silicon photonic crystal waveguide is studied. A high-reflectivity mirror on the end of the photonic crystal waveguide is used to recollect, in the backward-propagating fiber mode, the optical power that is initially coupled into the photonic crystal waveguide. An outcoupled power in the backward-propagating fiber mode of 88% of the input power is measured, corresponding to a lower bound on the coupler efficiency of 94%.
Barclay
Paul E
PE
Department of Applied Physics, California Institute of Technology, Pasadena, California 91125, USA. pbarclay@caltech.edu
Srinivasan
Kartik
K
Borselli
Matthew
M
Painter
Oskar
O