| 摘要 |
PURPOSE:To make the switching of a total reflection mirror unnecessary when oscillating frequencies are changed, by forming the total reflection mirror by a plurality of coating layers, which are functioned in correspondence with different wavelengths. CONSTITUTION:A laser generator is composed of a light exciting part 1; a total reflection mirror 2, which is provided on one side of the exciting part 1; and partial transmitting mirrors 3a and 3b, which are provided on the other side of the exciting part 1 so as to face the mirror 2. At this time, the total reflection mirror 2 is constituted by stacking, e.g., a mirror 2a, which is functioned in correspondence with laser light of 1.06mum, and a mirror 2b, which is functioned in correspondence with laser light of 1.32mum. Then, the laser light of 1.06mum and the laser light of 1.32mum can be used by switching the lights without switching the mirror 2. Thus the switching of the mirror 2 becomes unnecessary. |
