| 摘要 |
A fiber laser device (1) emits pulsed output light. A control unit (70) instructs an amplification pumping light source (30) to emit amplification pumping light in a state in which seed light generation pumping light is emitted from a seed light generation pumping light source (10) and an optical switch (23) is changed to a transmission state. The control unit (70) changes the optical switch (23) from the transmission state to a non-transmission state, with the amplification pumping light being emitted from the amplification pumping light source (30). When seed light is emitted, the control unit (70) changes the optical switch (23) to the transmission state again. The control unit (70) controls a period for which the optical switch (23) is in the non-transmission state and controls the intensity of the amplification pumping light emitted from the amplification pumping light source (30). |
