Generation of 172 fs pulse from a Nd: YVO4 picosecond laser by using multi-pass-cell technique

The device of multi-pass-cell (MPC) could broaden the spectra of ultrafast laser pulses based on the self-phase-modulation (SPM) effect, which is composed of two concave mirrors and nonlinear mediums. In this paper, the pulse duration of 172 fs is compressed from a 11.3 ps Nd: YVO4 regenerative amplifier at the repetition rate of 1 kHz by using two stages of MPC systems. The pulse duration is shortened by a factor of 66, and the pulse energy of 117 mu J is obtained with a total efficiency of 51%. With high average power Nd-doped laser systems at 10 ps level, this method has the potential to generate high power femtosecond lasers with high efficiency, compact configuration, and low cost.

Automated summary

In this study, the pulse duration of a Nd: YVO4 regenerative amplifier is compressed to 172 fs using a two-stage MPC system, achieving a pulse energy of 117 μJ with a total efficiency of 51%. This method has the potential to generate high power femtosecond lasers at 10 ps level, with high efficiency, compact configuration, and low cost.