New publication in Phys. Rev. Applied: Long-lived refractive-index changes induced by femtosecond ionization in gas-filled single-ring photonic-crystal fibers

Plasma recombination always follows photoionization of gas by intense femtosecond laser pulses, causing refractive-index changes via thermal and hydrodynamic effects. In gas-filled hollow-core photonic crystal fibers, these phenomena are induced by self-compressing pulses with microjoule energies. Using spatially-resolved interferometric probing from the side of the fiber, we uncover refractive-index changes with tens-of-µs lifetimes and observe plasma-driven acoustic waves that excite megahertz vibrations in the microstructure of the fiber. Our results imply that temporal non-local interactions of successive pulses will become important in any gas-based laser system operating simultaneously at high intensities and repetition rates.

Read full publication: J. R. Koehler, F. Köttig, B. M. Trabold, F. Tani, and P. St.J. Russell, Phys. Rev. Applied  10, 064020 (2018)


MPL Newsletter

Bleiben Sie auf dem Laufenden mit unserem Newsletter!
Der MPL Newsletter informiert Sie über aktuelle Forschungsergebnisse und spannende Neuigkeiten aus dem Institut.

Aktuelle Ausgabe: Newsletter No 15 - April 2020

Hier finden Sie vorherige Ausgaben des Newsletters.


Max-Planck-Zentren und -Schulen