| 摘要 |
PURPOSE:To obtain the titled device which not only incorporates an etalon in the laser resonator but also needs little adjustment, by providiing an etalon consistin of a sigle or a plurality of parallel flat plates or parallel gaps which reduces the pulse width by transmitting laser beams. CONSTITUTION:The first reflection mirror1, etalon 2 having a pair or more of parallel flat plates or parallel gaps, a rod 3 made of glass or the like, a Q switch element4, a forced mode snchronized modulation element 5, and the second reflection mirror are provided. The reflection mirror 6 trasmits light by making the reflectace smaller than that of the first reflection mirror. the etalon 2 is arrangeed by slight inclination not by rectangularity to the optical axis. Then, the rod 3 in the resonator composed of the first and second reflec tion mirrors 1 and 6 is excited with a flash lamp into laser oscillation and then subjected to forced mode synchronization with said element 5, thus oscillating stable short pulses; besides, micro laser pulses are made giant by Q switching wit the Q switch element 4. The reduction of pulse width by means of the etalon 2 ca be effectively accomplished by the enlargemet of pulses. |
