High-performance 86μJ,11.2 fs pulses with a spectrum range of 800-1050 nm are generated based on 1030 nm,190 fs Yb femtosecond pulses by using multi-plate-based spectral broadening and filtering.Taking advantage of s...High-performance 86μJ,11.2 fs pulses with a spectrum range of 800-1050 nm are generated based on 1030 nm,190 fs Yb femtosecond pulses by using multi-plate-based spectral broadening and filtering.Taking advantage of single beam configuration,the obtained pulses have excellent power and spectral stabilities.Since the output spectrum is obtained by spectrally filtering the broadened components,the temporal contrast of the output pulses is enhanced by at least four orders of magnitude.Together with the robust and simple setup,the proposed method is expected to be a competitive option for the generation of seed pulses for 10s-100s petawatt lasers.展开更多
A multistep pulse compressor(MPC)based on a single-pass single-grating pair(SSGP)is proposed to simplify the entire multi-petawatt(PW)compressor.Only one grating pair with relatively long perpendicular distance is use...A multistep pulse compressor(MPC)based on a single-pass single-grating pair(SSGP)is proposed to simplify the entire multi-petawatt(PW)compressor.Only one grating pair with relatively long perpendicular distance is used to generate the same amount of spectral chirp compared with a four-grating main compressor.As SSGP compressor induces the largest spatial chirp,it can introduce the best beam-smoothing effect to the laser beam on the last grating.When considering the diffraction loss of only two gratings,the total compression efficiency of the SSGP compressor is even larger than that of a four-grating main compressor.Furthermore,the wavefront aberration induced by the SSGP compressor can be better compensated by using deformable mirrors;however,it is difficult or complicated to be well compensated in a four-grating compressor.Approximately 50-100 PW laser pulses can be obtained using this SSGP-based multistage-smoothing MPC with a single laser beam.展开更多
基金supported by the Shanghai Municipal Natural Science Foundation(No.20ZR1464500)the National Natural Science Foundation of China(NSFC)(Nos.61905257 and U1930115)the Shanghai Municipal Science and Technology Major Project(No.2017SHZDZX02)
文摘High-performance 86μJ,11.2 fs pulses with a spectrum range of 800-1050 nm are generated based on 1030 nm,190 fs Yb femtosecond pulses by using multi-plate-based spectral broadening and filtering.Taking advantage of single beam configuration,the obtained pulses have excellent power and spectral stabilities.Since the output spectrum is obtained by spectrally filtering the broadened components,the temporal contrast of the output pulses is enhanced by at least four orders of magnitude.Together with the robust and simple setup,the proposed method is expected to be a competitive option for the generation of seed pulses for 10s-100s petawatt lasers.
基金supported by the National Natural Science Foundation of China(NSFC)(Nos.61527821,61905257,and U1930115)the Shanghai Municipal Science and Technology Major Project(No.2017SHZDZX02)
文摘A multistep pulse compressor(MPC)based on a single-pass single-grating pair(SSGP)is proposed to simplify the entire multi-petawatt(PW)compressor.Only one grating pair with relatively long perpendicular distance is used to generate the same amount of spectral chirp compared with a four-grating main compressor.As SSGP compressor induces the largest spatial chirp,it can introduce the best beam-smoothing effect to the laser beam on the last grating.When considering the diffraction loss of only two gratings,the total compression efficiency of the SSGP compressor is even larger than that of a four-grating main compressor.Furthermore,the wavefront aberration induced by the SSGP compressor can be better compensated by using deformable mirrors;however,it is difficult or complicated to be well compensated in a four-grating compressor.Approximately 50-100 PW laser pulses can be obtained using this SSGP-based multistage-smoothing MPC with a single laser beam.
