Enhanced light coupling in sub-wavelength single-mode silicon on insulator waveguides.
We report on NIR efficient end-coupling in single-mode silicon on insulator waveguides. Efficient coupling has been achieved using Polymer-Tipped Optical Fibers (PTOF) of adaptable radius of curvature (ROC). When compared with commercial micro lenses, systematic studies as a function of PTOF ROC, lead for subwavelength PTOF to a coupling factor enhancement as high as 2.5. This experimental behavior is clearly corroborated by radial FDTD simulations and an absolute coupling efficiency of about 50% is also estimated.
Pang
C
C
Laboratoire de Nanotechnologies et d'Instrumentation Optique, ICD, CNRS (FRE2848), Université de Technologie de Troyes, Troyes, France.
Gesuele
F
F
Bruyant
A
A
Blaize
S
S
Lérondel
G
G
Royer
P
P
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D012825:Silicon / Q000737:chemistry*; D014159:Transducers
D012825:Silicon