Patent ID: 7215686
Filing Date: 2007-05-08
Classification: G02B,H01S

Abstract:
1. A laser source for providing an optical signal having a first optical mode, said laser source disposed on a substrate, comprising: a first partially reflective optical component, the first partially reflective optical component for functioning as an output port; a first waveguide portion having a first optical length for propagating the optical signal with the first optical mode; a second waveguide portion having a second optical length coupled to the first waveguide portion for receiving the optical signal having the first optical mode and for transforming the optical mode of the optical signal from the first optical mode to a second optical mode along a length of the second waveguide portion; at least a corner reflector optically coupled to the second waveguide portion for receiving the optical signal having the second optical mode from the second waveguide portion and for internally reflecting the second optical mode back into the second waveguide portion, where the optical signal having the second optical mode upon reflection from the corner reflector propagates along the second waveguide portion and therefrom to the first waveguide portion; and, a gain medium, the gain medium disposed along an optical path between the corner reflector and the first partially reflective optical component forming a lasing cavity for the laser source for providing the optical signal having the first optical mode.