| 摘要 |
PURPOSE:To control the oscillating wave length stably by shifting a second mirror by feedback control through a resonator length change control means, based on the monitoring value of the oscillating wave length of an oscillated laser beam. CONSTITUTION:By an oscillated pigment laser beam 11 reflecting first and second reflecting mirrors 16 and 17 in order, the wave length of the pigment laser beam 11 is monitored by a wavelength monitor 18. Next, by the wavelength monitor 18 outputting a monitoring signal to a piezocontroller 19, the piezocontroller feeds back the resonator length control signal based on the monitoring value to a piezo element 15. By this feedback signal, a second mirror 11B is controlled to shift in the direction of a resonant shaft, whereby the proper and stable control of the oscillating wavelength by the change of resonator length can be done. |
