Proposal for Ultrabroadband Phase-Matching Optical Parametric Chirped Pulse Amplification with a Diverged Pump Beam

We propose a novel scheme for optical parametric chirped pulse amplification with a diverged pump beam to achieve an ultrabroadband phase-matching range, in which different signal wavelengths correspond to different inclination angles of the diverged pump beam. Simulation results show that the proposed scheme amplifies a signal pulse shorter than 10 fs at a wavelength of approximately 800 nm.