Speaker
Mr
Thomas Godin
(CIMAP)
Description
We report measurements of polarisability changes Δα between the excited and ground states of the chromium active ions in a laser material by using two different methods (time-resolved divergence diagnostic, Z-scan techniques). The first one indicates that Δα <0 (converging population lensing), while the second one gives Δα >0 (diverging population lensing). This discrepancy has been resolved by introducing the concept of correlation collapse between the centre and the wings of a laser beam subject to intra-cavity clipping.
Primary authors
Mr
Mohamed Traiche
(CDTA)
Mr
Thomas Godin
(CIMAP)
Co-authors
Prof.
Kamel Ait-Ameur
(CIMAP)
Dr
Michael Fromager
(CIMAP)
Prof.
Richard Moncorgé
(CIMAP)
Prof.
Tomaz Catunda
(Universidade de Sao Paulo)
