Intense Few-Cycle Infrared Laser Pulses at the Advanced Laser Light Source

B. E. Schmidt ； A. D. Shiner ； M. Giguère ； C. Trallero-Herrero ； P. Lassonde ； N. Thiré ； D. M. Villeneuve ； J-C. Kieffer ； P. B. Corkum ； F. Légaré

《Chinese Journal of Physics》 52卷1期PartII (2014/02) Pp. 537-545

https://doi.org/10.6122/CJP.52.537

並列摘要

To push the generation of isolated attosecond pulses towards shorter XUV wavelengths (0.3 to 1 keV), intense few-cycle driving pulses are required whose center frequency is significantly red shifted compared to established Ti-Sa technology. A simple route for generating these pulses is demonstrated using an optical parametric amplifier (OPA). Its infrared (IR) multi-cycle laser pulses with millijoule of energy are spectrally broadened by nonlinear propagation in a hollow-core fiber (HCF) filled with Argon. For the OPA Signal wavelength (λ = 1:4 micron), chirped mirrors were used for dispersion compensation with a resulting pulse duration of 13.1 fs. For the OPA Idler wavelength at 1.8 micron, a new compression scheme has been developed with which 11.2 fs laser pulses have been characterized (1 cycle = 6 fs). Here, pulse compression is achieved through the combined effects of self-steepening during nonlinear propagation in the HCF followed by anomalous dispersion during linear propagation in fused silica.

參考文獻

E. Hand, Nature 461, 708 (2009).

S. Kneip, et al., Nat. Phys. 6, 980 (2010).

S. Fourmaux, et al., Opt. Lett. 36, 426 (2011).

K. Ta Phuoc, et al., Nat. Phot. 6, 308 (2012).

M. Schnell, et al., Nat. Comm. 4, 1 (2013).