| 摘要 |
<p>A PA section (3) of a fiber laser device includes: an amplifying fiber (4); an LD (5) for exciting the amplifying fiber (4); an LD heat sink (6a) that absorbs heat generated by the LD (5); and an LD fan (7a), a thermistor (8), and a CPU (9) that control a heat resistance R th of the LD heat sink (6a). A temperature of the LD (5) is controlled to approach T peak by changing the heat resistance R th of the LD heat sink (6a), where T peak is a temperature at which a lasing wavelength of the LD (5) equals a wavelength at which an absorptance by the amplifying fiber (4) peaks.</p> |
