Silicon nanophotonic multitaper for efficient light coupling between fiber and silicon waveguide

A multitaper (MT) coupler is fabricated on a silicon chip for light coupling with high efficiency and resistance to fabrication errors. Other coupling techniques such as a single taper are less efficient and prone to fabrication errors. The dimensions of the MT can be optimized for a specific coupling geometry and can span sizes from several nanometers up to several microns. (C) 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)