Effect of input pulse chirp on nonlinear energy deposition and plasma excitation in water

Abstract

We analyze numerically and experimentally the effect of the input pulse chirp on the nonlinear energy deposition from $5\mu$J fs-pulses at $800$ nm to water. Numerical results are also shown for pulses at $400$ nm, where linear losses are minimized, and for different focusing geometries. Input chirp is found to have a big impact on the deposited energy and on the plasma distribution around focus, thus providing a simple and effective mechanism to tune the electron density and energy deposition. We identify three relevant ways in which plasma features may be tuned.

9 pages, 7 figures

References in corpus (1)

• Time-resolved refractive index and absorption mapping of light-plasma filaments in water

Cited by in corpus (2)

• Energy deposition dynamics of femtosecond pulses in water
• Effects of dopant type and concentration on the femtosecond laser ablation threshold and incubation behaviour of silicon