Patent ID: 8634443
Filing Date: 2014-01-21
Classification: H01S

Abstract:
1. A laser diode, comprising: a plurality of structures, each of which having a function of scattering, absorbing or reflecting stray light, disposed on at least one of both sides of an optical waveguide, in a region along said optical waveguide, each of the plurality of structures comprising a recess; and a specific material portion disposed over the optical waveguide and extending into the plurality of structures, the specific material portion filling an entirety of the structures, wherein at least one of said structures is formed in each divided region obtained by equally dividing said region along said optical waveguide into three or more parts in the longitudinal direction of said optical waveguide, said three or more parts comprising an output end, a midpoint, and a reflective end of the laser diode, wherein said recess is positioned remote to said optical waveguide, wherein, in a side view, said recess is arranged in a position which overlaps with said optical waveguide, wherein a semiconductor portion of the laser diode comprises: wherein a depth of said recess reaches at least said active layer from an upper surface of said contact layer.