CEP-stable 4 fs near-IR pulses with 3 mJ energy were generated by spectral broadening of circularly polarized 8 mJ pulses in a differentially pumped 2-m-long composite stretched flexible hollow fiber. The pulses were characterized using both SHG-FROG and SHG d-scan methods.

No abstract

No abstract

Vibrational relaxation measurements in several gases have been made, subsequent to vibrational pumping by picosecond pulse-generated ``transient'' stimulated Raman scattering. This technique permits relaxation measurements at room temperature or below in a number of gases for which previously no such measurement was possible.

3-mJ, 4-fs CEP-stable pulses were generated by spectral broadening of circularly polarized 8mJ pulses in a differentially pumped 2-m-long hollow fiber. The pulses were characterized by SHG d-scan method.