Some laser damage of glass, scintillator and optical materials

Electrical, optical, and thermodynamical aspects of sound propagation in HgTe, HgSe, Hg1−xMnxSe, and MnZn spinel ferrites

“…Breakdown of Hg 1-x Mn x Se and Mn 1-x Zn x Fe 2 O 4 samples, occurring at certain laser-light energies (power densities), is related to the opto-acoustic properties of the materials. By revealing the details of the photonphonon coupling mechanism, [8][9][10][11][12][13][14] it can be related to the results of the Brillouin-scattering and spectralbroadening investigations. The answer on the principal question, in what way the laser-light coupling with material initiates the breakdown, could be obtained in that way.…”

Models of Interactions of Laser Beams with Materials of Interest for Optical Components and Provoked Damages

“…Micro-fractures have been monitored and analyzed. Three groups of specimens have been examined: (1) alphafilcon specimens -co-polymer of 2hydroxethyl methacrylate, N-vinyl pyrolidone and 4-tertiary butyl-2-hydroxycyclohexyl methacrylate, which contains 66% of water when immersed in appropriate sterile NaCl and borate buffer solution (density of 1.075 g/cm 3 The specimens are exposed to following lasers: CO 2 , diode (808 nm), Er:YAG (2.9 µm) and pulsed Nd 3+ :YAG laser (20 mJ, 15 ns, 1.064 µm). a…”

“…), damaging attracts much attention nowadays. The investigation of the cases on the border between temporary and permanent change provides the information on the resistivity of optical components [1][2][3][4][5][6][7][8][9][10][11].…”

“…Much research has been done in material exposition to laser beams of various dynamical operating regimes [1 -11]. There are various data considering the threshold of damages, namely, laser-induced damage threshold (LIDT) [1][2][3], showing the tendency for standardization of fracture-appearing phenomena. There are various established procedures for determining the damage threshold.…”

“…In studying damages induced via dielectric, thermal, Brillouin or other breakdown (including mechanical) processes, the material purity plays an important role. For instance, if inclusions in optical components are in the form of metal particles, specific cracks appear and damages provoked in active materials (ruby, glass) are explained by specific approaches [1][2][3]10]. Besides various theoretical approaches, with plasma phenomena included or not, experimental results are the most reliable confirmation of recommended model.…”