SEMICONDUCTOR LASER EXCITATION SOLID LASER CONTROL DEVICE, SEMICONDUCTOR LASER EXCITATION SOLID LASER DEVICE HAVING THE SAME, AND AN IMAGE FORMATION DEVICE HAVING THE SAME

摘要

A semiconductor laser excitation solid laser control device (1A) stabilizes a light quantity of an output light (LO) of a semiconductor laser excitation solid laser (2). The device (1A) includes: a beam splitter (11A) for branching the laser light emitted from the semiconductor excitation solid laser (2) into an output light (LO) and a control light (LC); a light reception element (12) for detecting the light quantity of the control light (LC) branched by the beam splitter (11A); and control means (13) for controlling the light quantity of the laser light emitted from the semiconductor laser excitation solid laser (2) so that the light quantity detected by the light reception element (12) is constant. The beam splitter (11A) has a transmittance and a reflectivity not depending on the polarization characteristic of the laser light.