Patent ID: 8693517

Claim:
A semiconductor laser using an external resonator, comprising: a laser diode chip that emits a laser beam; a first reflection mirror that reflects the laser beam into a first direction, wherein the first direction is perpendicular to an arrangement plane that is parallel to a bottom plane of a package for the laser diode chip; a lens having an optical axis disposed in the first direction, the lens configured to receive the laser beam from the first reflection mirror and to collimate the laser beam into a parallel beam; a second reflection mirror that reflects the parallel beam from the lens into a second direction; a third reflection mirror that reflects the parallel beam from the second reflection mirror back to the second reflection mirror; and a lens support configured to support the lens; wherein the lens support is moveable in the arrangement plane such that an incident angle of the parallel beam onto the third reflection mirror is perpendicular to an optical axis of the third reflection mirror for feedback of the parallel beam to the laser diodes chip; and wherein the lens support comprises first and second supports, wherein the lens and the second reflection mirror are disposed into a space between the first and second supports and the first reflection mirror is positioned under the space.