Phase explosion induced by high-repetition rate pulsed laser

The characteristics and mechanisms of the damage to absorbing glass with high-repetition laser pulses (several kHz) are discussed. The results show that: (1) in the range of comparatively low-repetition rate, the damage is characterized by material melting and a small crater on the surface of substrate; (2) with the increase in repetition rate, a bigger and deeper crater is surrounded by re-deposition and crystalline granules originating from the cooling of vapor; and (3) the crater, surrounded by evaporation and an large number of solid particulates which is obviously the characters of phase explosion, becomes even bigger and deeper when the repetition rate is further increased. We modeled the temperature distribution in different repetition rate regime and found that heat accumulation plays a significant role in damage process. Because of the temperature dependence of damage mechanism, the temperature of the area irradiated by laser beam will ramp up with increasing the repetition rate, which triggers the melting and evaporation of dielectrics and phase explosion successively. Our results may benefit the understanding of laser-induced damage in optical materials.

[1]  C. Grigoropoulos,et al.  Gas dynamics and radiation heat transfer in the vapor plume produced by pulsed laser irradiation of aluminum , 1996 .

[2]  A. Faghri,et al.  A generalized thermal modeling for laser drilling process—I. Mathematical modeling and numerical methodology , 1997 .

[3]  Davide Bleiner,et al.  Multiplicity and contiguity of ablation mechanisms in laser-assisted analytical micro-sampling , 2006 .

[4]  C Amra,et al.  Statistical study of single and multiple pulse laser-induced damage in glasses. , 2002, Optics express.

[5]  Perry,et al.  Laser-induced damage in dielectrics with nanosecond to subpicosecond pulses. , 1995, Physical review letters.

[6]  J. Siegel,et al.  The influence of thermal diffusion on laser ablation of metal films , 1994 .

[7]  R. Russo,et al.  Evidence for phase-explosion and generation of large particles during high power nanosecond laser ablation of silicon , 2000 .

[8]  D Kitriotis,et al.  Multiple pulse laser-induced damage phenomena in silicates. , 1989, Applied optics.

[9]  Jim J. Chang,et al.  Laser‐plasma interaction during visible‐laser ablation of methods , 1996 .

[10]  Cristian Porneala,et al.  Observation of nanosecond laser-induced phase explosion in aluminum , 2006 .

[11]  G. Feng,et al.  Phase distortions due to temperature rise of optics irradiated by periodically repeated short pulses , 2006 .

[12]  A. Langdon,et al.  Absorption of laser light in overdense plasmas by sheath inverse bremsstrahlung , 1995 .

[13]  S. Mao,et al.  Delayed phase explosion during high-power nanosecond laser ablation of silicon , 2002 .

[14]  S. C. Jones,et al.  Recent Progress On Laser-Induced Modifications And Intrinsic Bulk Damage Of Wide-Gap Optical Materials , 1989 .

[15]  M Commandré,et al.  Effect of multiple laser irradiations on silica at 1064 and 355 nm. , 2005, Optics letters.

[16]  A. Chmel,et al.  Fatigue laser-induced damage in transparent materials , 1997 .

[17]  R. Russo,et al.  Explosive change in crater properties during high power nanosecond laser ablation of silicon , 2000 .

[18]  Francois Y. Genin,et al.  Laser-induced damage of absorbing and diffusing glass surfaces under IR and UV irradiation , 1999, Laser Damage.

[19]  Q. Lu.  Thermodynamic evolution of phase explosion during high-power nanosecond laser ablation. , 2003, Physical review. E, Statistical, nonlinear, and soft matter physics.

[20]  K. Sokolowski-Tinten,et al.  Timescales in the response of materials to femtosecond laser excitation , 2004 .

[21]  Andrew V. Pakhomov,et al.  Laser-induced phase explosions in lead, tin and other elements: microsecond regime and UV-emission , 2003 .

[22]  Xianfan Xu.  Phase explosion and its time lag in nanosecond laser ablation , 2002 .