Light emitting device
A light emitting device includes: a base member; a first semiconductor laser element disposed on an upper surface of the base member, wherein the first semiconductor laser element is configured to emit laser light from a first light emitting surface; a first light-reflecting member disposed on the upper surface of the base member, wherein the first light-reflecting member has a first light-reflecting surface configured to reflect the first laser light; a second semiconductor laser element disposed on the upper surface of the base member, wherein the second semiconductor laser element is configured to emit laser light from a second light emitting surface; and a second light-reflecting member disposed on the upper surface of the base member, wherein the second light-reflecting member has a second light-reflecting surface configured to reflect the second light.
1 . A light emitting device comprising:
a base member having a planar upper surface;
a first semiconductor laser element disposed on the upper surface of the base member, wherein the first semiconductor laser element is configured to emit laser light from a first light emitting surface that is perpendicular to the upper surface of the base member;
a first light-reflecting member disposed on the upper surface of the base member, wherein the first light-reflecting member has a first light-reflecting surface configured to reflect the first laser light, and a pair of opposite first lateral surfaces between which the first light-reflecting surface extends;
a second semiconductor laser element disposed on the upper surface of the base member, wherein the second semiconductor laser element is configured to emit laser light from a second light emitting surface that is perpendicular to the upper surface of the base member; and
a second light-reflecting member disposed on the upper surface of the base member, wherein the second light-reflecting member has a second light-reflecting surface configured to reflect the second light, and a pair of opposite second lateral surfaces between which the second light-reflecting surface extends; wherein:
the first semiconductor laser element and the second semiconductor laser element are disposed such that the first light emitting surface and the second light emitting surface are parallel to each other;
the first light-reflecting member and the second light-reflecting member are disposed such that one of the pair of opposite first lateral surfaces of the first light-reflecting member and one of the pair of opposite second lateral surfaces of the second light-reflecting member face each other and are parallel to each other;
the first light-reflecting surface of the first light-reflecting member is inclined with respect to the upper surface of the base member at an angle other than perpendicular;
the second light-reflecting surface of the second light-reflecting member is inclined with respect to the upper surface of the base member at an angle other than perpendicular;
in a top view, which is a view taken in a direction perpendicular to the upper surface of the base member, a line along which said one of the pair of opposite lateral surface of the first light-reflecting member extends and a line along which the first light emitting surface extends are at an angle other than perpendicular; and
in the top view, a line along which said one of the pair of opposite lateral surface of the second light-reflecting member extends and a line along which the second light emitting surface extends are at an angle other than perpendicular.
2 . The light emitting device according to claim 1 , wherein:
in the top view, the first light-reflecting surface and the second light-reflecting surface are disposed between the line along which the first light emitting surface extends and the line along which the second light emitting surface extends; and
in the top view, the first light emitting surface and the second light emitting surface are disposed outside of an area between (i) a line along which an edge of the first light- reflecting surface located closest to the first light emitting surface extends and (ii) a line along which an edge of the second light-reflecting surface located closest to the second light emitting surface extends.
3 . The light emitting device according to claim 1 , further comprising:
a first sub-mount on which the first semiconductor laser element is disposed; and
a second sub-mount on which the second semiconductor laser element is disposed.
4 . The light emitting device according to claim 3 , wherein
in the top view, the first semiconductor laser element is offset in a first direction from a center of the first sub-mount; and
in the top view, the second semiconductor laser element is offset in a second direction from a center of the second sub-mount, the second direction being opposite the first direction.
5 . The light emitting device according to claim 1 , further comprising:
a cover fixed to the base member, wherein the base member and the cover hermetically seal a space in which the first semiconductor laser element and the second semiconductor laser element are disposed.
6 . The light emitting device according to claim 1 , wherein, in the top view, a distance between the first light emitting surface and the second light emitting surface is less than the sum of a length of the first light-reflecting member and a length of the second light-reflecting member.