LASER DEVICE

摘要

A laser device 1 demultiplexes seed light L0 into a plurality of beams of laser light L1 and then continuously optically amplifies the plurality of beams of the laser light L1 with an amplifier 14. Therefore, its amplification factor can be set higher than that in the case of amplifying pulsed laser light. When producing multiplexed light L3 by multiplexing the beams of the amplified laser light L1 with a diffraction grating 16, respective phases of the beams of the laser light L1 are controlled such that an output peak of the multiplexed light L3 repeatedly appears at a converging position P1 at a predetermined time interval. This produces pulsed laser light at the converging position P1 from a plurality of beams of laser light L2 amplified at a high amplification factor. Hence, this laser device 1 can produce pulsed laser light with a high output.

主权项

1. A laser device comprising:
oscillation means for oscillating a laser pulse train constituted by a plurality of beams of continuous laser light having frequencies different from each other; demultiplexing means for demultiplexing the laser pulse train oscillated from the oscillation means into a plurality of beams of the continuous laser light having frequencies different from each other; amplification means for amplifying each of the beams of the continuous laser light demultiplexed by the demultiplexing means; multiplexing means for multiplexing at a predetermined position the beams of the continuous laser light amplified by the amplification means, so as to produce multiplexed light; and phase control means for controlling a phase of each of the beams of the continuous laser light such that an output peak of the multiplexed light repeatedly appears at the predetermined position at a predetermined time interval; wherein the amplification means includes a pumping light source for oscillating pumping light and a nonlinear crystal for receiving each of the beams of the continuous laser light and the pumping light and makes each of the beams of the continuous laser light and the pumping light incident on the nonlinear crystal such as to satisfy a phase-matching condition of optical parametric amplification, thereby amplifying each of the beams of the continuous laser light.