LASER DEVICE

摘要

The present invention is provided with a heat source (3) for applying uniform heat to a clad (2b), heat sinks disposed on the side faces of a planar waveguide parallel to the optical axis A of a laser beam, and an intensity measurement unit (8) for measuring the intensity of the laser beam coupled by a coupling optical element (7), and is configured so that a heat value control unit (9) adjusts the heat value applied by the heat source (3) in accordance with the difference between the intensity measured by the intensity measurement unit (8) and the desired intensity so that the difference is brought closer to zero. As a consequence thereof, even after the heat sinks (4a), (4b) are joined, the amount of coupling of the laser beam by the coupling optical element (7) can be adjusted.