| 摘要 |
PURPOSE:To assure a high power at a GHz order repetition frequency by providing a mode locking unit in a resonator of a solid state laser. CONSTITUTION:A laser diode-excited solid state laser device comprises a laser diode 1, a focusing lens 2, a laser rod 3, and an output mirror 5. The device further includes a mode locking unit 4 in its laser resonator. For the mode locking unit 4, there are available an acoustooptic element, a saturable dye, or an optical modulator type optical waveguide. Since the optical waveguide suffers from a large optical transmission loss, the acoustooptical element and the saturable dye are preferably used. Hereby, high peak power continuous pulses of GHz order repetition rate is assured, so that effective wavelength conversion can be realized substantially in continuous oscillation. Additionally, there may be provided in the laser resonator the mode locking unit and an nonlinear optical element or in the laser resonator the mode locking unit and outside the resonator the nonlinear optical element. |
