Method for amplifying ultra-short laser pulses and method for designing amplification system

The invention relates to a method for amplifying an ultrashort laser pulse, comprising the following steps: a) temporally stretching an ultrashort laser pulse and obtaining a temporally stretched laser pulse; b) amplifying the time-stretched laser pulse and obtaining an amplified time-stretched laser pulse; c) compressing the amplified time-stretched laser pulse and obtaining an amplified ultra-short laser pulse, at least one amplified phase contribution being compensated by the following means, the at least one amplified phase contribution is selected from the group consisting of: a dynamic amplified phase contribution of the laser pulse, a bandwidth amplified phase contribution of the laser pulse, and a combination of the dynamic amplified phase contribution and the bandwidth amplified phase contribution, the dynamically amplified phase contribution is determined as a non-linear phase change due to the dynamic amplification in step b), and the bandwidth amplified phase contribution of the laser pulse is det