Time dependent evolution of refractive index around a molten pool in glass welding by ultra-short pulses
The time-dependent phase evolution is shown for different feed speeds. The units of the phase legend is Pi. The time duration between the shown frames is 44.4 µs. The laser pulse repetition rate is 450 kHz, the (original) camera frame rate is 225 kHz. The image scale is 2.13 µm/pxl. For more details on original experiments see: Alexeev I, Heberle J, Cvecek K, Nagulin, Schmidt. High Speed Pump-Probe Apparatus for Observation of Transitional Effects in Ultrafast Laser Micromachining Processes. Micromachines 2015;6:1914-22.