Time-resolved photoelasticity imaging of transient stress fields in solids induced by intense laser pulses

Observation of photoluminescence from YVO4:Eu3+ nanoparticles produced in laser ablation in water

“…Due to the rapidity of the machining process after laser-pulse irradiation, observations have generally been made using the pump-and-probe method for investigations in laser machining. [9][10][11][12][13] Several studies have also produced imaging and spectroscopic observations with the pump-and-probe method in PLAL. [14][15][16][17][18][19][20][21][22] This approach enables time-resolved images and emission spectra measurements on a shot-to-shot basis.…”

Influences of Focusing Conditions on Dynamics of Laser Ablation at a Solid–Liquid Interface

“…We have developed a time-resolved photoelasticity imaging technique that allows simultaneous observation of the dynamics of both the laser-induced stress wave (LSW) in the solid target and the shock wave and plasma in the liquid phase with a time resolution of nanoseconds. [10][11][12][13] By this method, we are able to monitor the intensity of LSWs directly via the number of photoelastic fringes. 10) In this paper, we applied this technique to investigate the influences of focusing conditions and breakdown on the emission of shock waves in the liquid phase and on the strength of LSWs in the solid phase.…”

“…Experiments were performed using a pump-and-probe technique with two Nd:YAG laser sources: the fundamental radiation (1064 nm, 13 ns) was used as the pump pulse and a second-harmonic radiation (532 nm, 13 ns) was used as the probe pulse. The experimental method was similar to those in our previous reports, [10][11][12][13] and only an outline is described here. For delay times shorter than 100 ns, only one laser source was used to provide both the fundamental and second-harmonic radiations, which acted as the pump and probe pulses, respectively.…”