Pulse laser light source

特許 権利維持 PROBLEM TO BE SOLVED: To provide a pulse laser light source that stabilizes absolute frequencies in all the longitudinal oscillation modes. ; SOLUTION: A mode hopping suppression circuit 7 is provided in a resonator of a mode synchronous laser light source 1. A signal for adjusting the repetition frequencies from a clock extractor 51 and a PLL circuit 6 is fed-back negatively to a microwave phase control circuit 5 in a reproduction mode synchronous circuit so as to stabilize the frequency interval in a longitudinal oscillation mode of a laser beam.