| 摘要 |
PURPOSE:To reduce the noises of the semiconductor laser device oscillating in a single mode by controlling the space of a resonator in response to a temperature change and conforming the space of the resonator to a temperature change in central wavelength of the gain distribution of a laser medium. CONSTITUTION:A non-reflecting coating 2 is formed to one end surface of a semiconductor laser 1, a reflecting mirror 3 to which a piezo-element 4 is attached is set up opposed to the coating, and the resonator of the device is constituted by the other end surface 5 of the laser element 1 and the reflecting mirror 3. The piezo-element 4 is driven so as to conform to the change of the gain distribution of the laser element in response to a temperature change, and moved in parallel with the end surface of the laser element 1, thus fixing the oscillating mode of laser beams. |
