Athermal arrayed waveguide gratings (AWGs) in silicon-on-insulator (SOI) are
experimentally demonstrated for the first time to our knowledge. By using narrowed arrayed
waveguides, and then overlaying a polymer layer, the wavelength temperature dependence
of the AWGs is successfully reduced to− 1.5 pm/° C, which is more than 1 order of magnitude
less than that of normal SOI AWGs. The athermal behavior of the AWGs is obtained with little
degradation of their performance. For the central channel, the cross talk is less than− 15 dB …

Athermal arrayed waveguide gratings in silicon-on-insulator by overlaying a polymer
cladding on narrowed waveguides … Athermal arrayed waveguide gratings in silicon-on-insulator
by overlaying a polymer cladding on narrowed waveguides … Athermal arrayed waveguide
gratings in silicon-on-insulator by overlaying a polymer cladding on narrowed waveguides …