High temporal contrast 1053 nm laser source based on optical parametric amplification and second-harmonic generation

Temporal contrast directly affects the interaction between ultraintense and ultrashort pulse lasers with matter. Seed laser sources with broad bandwidth and high temporal contrast are significant for overall temporal contrast enhancement. The technique of cascaded nonlinear processes with optical parametric amplification and second-harmonic generation is demonstrated for high temporal contrast seed source generation. Within 40 ps before the main pulse, the temporal contrast reaches over 10(11). The pulse energy and duration of the high-contrast pulse are 112 mu J and 70 fs, respectively. Considering its high beam quality and stability, this laser source can serve as a high-quality seed for Nd:glass-based ultraintense and ultrashort pulse laser facilities.

Automated summary

Temporal contrast directly affects the interaction between ultraintense and ultrashort pulse lasers with matter. Broad bandwidth and high temporal contrast seed laser sources are significant for overall temporal contrast enhancement. The technique of cascaded nonlinear processes with optical parametric amplification and second-harmonic generation is demonstrated for high temporal contrast seed source generation, reaching a contrast of over 10(11) within 40 ps before the main pulse. The high-contrast pulse has a pulse energy of 112 μJ and a duration of 70 fs, and its high beam quality and stability make it suitable as a high-quality seed for Nd:glass-based ultraintense and ultrashort pulse laser facilities.