Single-stage few-cycle nonlinear compression of milliJoule energy Ti:Sa femtosecond pulses in a multipass cell

TL;DR

This paper demonstrates a robust method for compressing high-energy Ti:Sa femtosecond pulses from 30 fs to 5.3 fs using a multipass cell filled with argon, achieving near-single-cycle durations with high beam quality.

Contribution

It introduces a single-stage, few-cycle nonlinear compression technique for mJ-level Ti:Sa pulses in a multipass cell, advancing energy-scalable ultrashort pulse generation.

Findings

Pulse duration reduced from 30 fs to 5.3 fs

High spatial quality and homogeneity of the compressed pulses

Potential for energy-scalable few-cycle pulse generation

Abstract

We report on the nonlinear temporal compression of mJ energy pulses from a Ti:Sa chirped pulse amplifier system in a multipass cell filled with argon. The pulses are compressed from 30 fs down to 5.3 fs, corresponding to two optical cycles. The post-compressed beam exhibits excellent spatial quality and homogeneity. These results pave the way to robust and energy-scalable compression of Ti:Sa pulses down to the few-cycle regime.