The frequency domain optical parametric amplification technology, as a new technology reserve for ultra-strong ultra-short pulses of 10 PW or even EW-level OPCPA systems, has many advantages in achieving high-energy ultra-wideband OPCPA. It can take the large gain bandwidth into consideration while enlarging the energy of ultra-short pulses, does not need stretcher and compressor, and is not restricted by materials such as crystal growth and grating damage threshold. In this thesis, the theoretical analysis and numerical simulation of frequency-domain chirped-pulse parametric amplification (FOPA) are mainly performed to complete the entire system design and experimental verification. Based on the picosecond laser system in the laboratory, the experimental verification of the frequency-domain optical parametric chirped-pulse amplification technology with a center wavelength of 800 nm and a gain bandwidth of nearly 100 nm has been completed.
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