| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser amplifier and a laser amplification method providing a high-quality laser beam with a high output.SOLUTION: In the laser amplifier 1, a plurality of pump beams Lto Lis made incident on a nonlinear crystalline body 9 for one signal beam Lso as to satisfy phase matching conditions of beam parametric amplification. Thus, energy is converted from the plurality of pump beams Lto Lto one signal beam Land the signal beam Lis amplified. Then, even when phases of the plurality of pump beams Lto Lmade incident on the nonlinear crystalline body 9 are not equal to each other, random phase difference between the signal beam Land each pump beam Lto Ltransfers to an idler beam and, therefore, one signal beam Lis amplified without being affected by phase information of the plurality of pump beams Lto L. |
