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Several articles have considered beam quality in OPCPA systems [26, 27], mainly by examining the influences of the pump beam-profile and dephasing on OPA gain and signal beam quality.
First, the OPCPA process pumped by a phase-modulated beam is investigated.
The spatial characteristics of the OPCPA process were analyzed in detail.
Compared with OPA, near-infrared laser pumped OPCPA is more promising for producing high-energy midinfrared lasers without causing significant nonlinear pulse distortion or causing damage.
This undoubtedly enlarges the achievable operation range of intense mid-IR OPCPAs. In summary, LGN is a very qualified candidate for the nonlinear crystals of OPA and/or OPCPA aiming to obtain high-peak-power few-cycle mid-IR pulses.
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