Patent ID: 9709738
Date: 2017-07-18
CPC Classifications: G02B

Claim:
1. A waveguide crossing comprising: a first waveguide; a second waveguide intersecting the first waveguide such that a gap equal to a width of the second waveguide is formed in the first waveguide; wherein the first waveguide comprises a first waveguide section through which a single optical mode propagates, followed by a first non-adiabatic diverging taper, followed by a second waveguide section wider than the first waveguide section, through which two even-order optical modes propagate, followed by a second non-adiabatic diverging taper, followed by a third waveguide section wider than the second waveguide section through which three even-order optical modes propagate; and wherein the first waveguide further comprises, downstream of the gap, a fourth waveguide section, followed by a first non-adiabatic converging taper, followed by a fifth waveguide section narrower than the fourth waveguide section, followed by a second non-adiabatic converging taper, followed by a sixth waveguide section narrower than the fifth waveguide section.