Laser amplification device and laser amplification method

A laser amplification device comprising:

• an amplifier configured to amplify an intensity of signal light and output amplified light;
• and
• a phase adjuster configured to adjust a phase of each wavelength component included in the signal light or the amplified light,
• wherein the amplifier includes:
• a signal light source configured to output the signal light as pulsed light;
• an excitation light source configured to output excitation light as pulsed light;
• and
• a nonlinear optical crystal configured to emit the amplified light by incidence of the signal light and the excitation light,
• the nonlinear optical crystal has a plurality of spatially different crystal portions, and
• the signal light source, the excitation light source, and the nonlinear optical crystal are arranged such that the signal light and the excitation light are simultaneously incident on the plurality of crystal portions and that elements of at least one of a set of angles of incidence between crystal axes of the plurality of crystal portions and the signal light and a set of angles of incidence between crystal axes of the plurality of crystal portions and the excitation light are different.