| 摘要 |
<p>A laser device that can prevent abnormal oscillations in the amplifier is provided. The laser device includes: a seed light source (10) that outputs seed light; a pumping light source (20) ; an amplification optical fiber (30) as the amplifier that amplifies the seed light with an element pumped by the pumping light source (20) ; a monitor unit (50) that is provided between the seed light source (10) and the amplification optical fiber (30), and monitors the intensity of the light output from the amplification optical fiber (30); and a light source controller (61) that controls the seed light source (10). In this laser device, when the light input to the monitor unit (50) has an intensity equal to or higher than a predetermined intensity while the seed light is not input to the amplification optical fiber (30), the light source controller (61) forces to output the seed light from the seed light source (10).</p> |
