Patent ID: 6970625
Filing Date: 2005-11-29
Classification: G02B

Abstract:
1. An optical apparatus, comprising: an input waveguide section having a propagation axis and a first width; a linear taper section coupled to the input waveguide section, the linear taper section having a first edge having a width equal to the first width and a second edge having a second width greater than the first width, wherein the linear taper section tapers at a first angle relative to the propagation axis; a first branching waveguide; a second branching waveguide, and a straight section including a first straight segment extending between the first branching waveguide and the linear taper section and a second straight segment extending between the second branching waveguide and the linear taper section, wherein the first straight segment has a first inner wall and wherein the second straight segment has a second inner wall, wherein the first straight segment and the second straight segment fan-out from a gap between the first inner wall and the second inner wall at the linear taper section, and wherein the first straight segment and the second straight segment fan-out at a second angle different than the first angle, wherein a first trailing edge of the first branching waveguide forms an acute angle with the propagation axis and wherein a second trailing edge of the second branching waveguide form an acute angle with the propagation axis.