Jeong Hwan Song
Electronics Letters
Grating couplers are proposed for polarization-independent coupling of light between a single-mode fiber and a 220-nm-thick channel waveguide on silicon-on-insulator.The grating couplers have nonuniform grating periods that are composed of the ntersection or union of a set of two near-optimal TE-and TM-grating periods. The proposed grating couplers have a coupling efficiency greater than 20% and polarization dependent loss (PDL) lower than 0.5 dB within 3-dB bandwidth in design. For the evaluation of the design concept, a fabricated intersection grating coupler has the PDL of less than 0.8 dB within the wavelength range of 1540 to 1560 nm, and the coupling efficiency is ∼18%.
Jeong Hwan Song
Electronics Letters
Clint L. Schow, Fuad Doany, et al.
OFC 2011
Benjamin G. Lee, Daniel M. Kuchta, et al.
PHOSST 2010
Neinyi Li, Clint L. Schow, et al.
OFC/NFOEC 2010