Compression of CEP-stable multi-mJ laser pulses down to 4 fs in long hollow fibers

Abstract

Carrier envelope phase stable 4 fs near-IR pulses with 3 mJ energy were\ngenerated by spectral broadening of circularly polarized 8 mJ pulses in a\ndifferentially pumped 2 m long composite stretched exible hollow ber. The\npulses were characterized using both second-harmonic generation\nfrequency-resolved optical gating (SHG-FROG) and SHG d-scan methods\n