Optical waveguide crossing and method of making same

Abstract

A photonic integrated circuit including: at least first and second optical waveguides, wherein the second of the optical waveguides at least partially overlies the first of the optical waveguides; and, an inkjet deposited layer forming a sufficiently smooth profile elevating the second of the optical waveguides with respect to the first of the optical waveguides where they at least partially overlie so as to at least partially mitigate losses in optical signals traversing at least one of the first and second optical waveguides otherwise due to the second optical waveguide at least partially overlying the first optical waveguide.

1 . A photonic integrated circuit comprising: 
 at least first and second optical waveguides, wherein said second of said optical waveguides at least partially overlies said first of said optical waveguides; and,    an inkjet deposited layer forming a sufficiently smooth profile elevating said second of said optical waveguides with respect to said first of said optical waveguides where they at least partially overlie so as to at least partially mitigate losses in optical signals traversing at least one of said first and second optical waveguides otherwise due to said second optical waveguide at least partially overlying said first optical waveguide.