Analysis of 1ω bulk laser damage in KDP.

The influence of laser parameters on laser-induced damage in the bulk of KDP is difficult to determine because the damage manifests as discrete sites a few micrometers in diameter distributed throughout a relatively large volume of material. Here, we present a method to directly measure the size and location of many thousands of such sites and correlate them to the laser conditions that produced them. This technique is used to characterize the effects of pulse duration on damage initiated by 1053 nm light in the bulk of KDP crystals. We find that the density of damage sites produced by 1053 nm light is less sensitive to pulse duration than was previously reported for 526 nm and 351 nm light. In addition, the effect of pulse duration on the size of the damage sites produced appears insensitive to wavelength.

[1]  李大伟,et al.  One-on-One and R-on-One Tests on KDP and DKDP Crystals with Different Orientations , 2009 .

[2]  C. Carr,et al.  Effect of multiple wavelengths on laser-induced damage in KH(2-x)DxPO4 crystals. , 2006, Optics letters.

[3]  Timothy L. Weiland,et al.  A large-aperture high-energy laser system for optics and optical component testing , 2004, SPIE Laser Damage.

[4]  M. Feit,et al.  Laser-induced damage in deuterated potassium dihydrogen phosphate. , 2003, Applied optics.

[5]  M. Feit,et al.  Dynamics of material modifications following laser-breakdown in bulk fused silica. , 2010, Optics express.

[6]  Claude Amra,et al.  Toward an absolute measurement of LIDT , 2003, SPIE Laser Damage.

[7]  Jean-Yves Natoli,et al.  KDP crystal orientation influence on the nanosecond laser-induced damage at 1064nm , 2010, Laser Damage.

[8]  S G Demos,et al.  Wavelength dependence of laser-induced damage: determining the damage initiation mechanisms. , 2003, Physical review letters.

[9]  Michael D. Feit,et al.  Complex morphology of laser-induced bulk damage in K2H(2−x)DxPO4 crystals , 2006 .

[10]  J. J. Adams,et al.  Comparison between S/1 and R/1 tests and damage density vs. fluence (ρ(Φ)) results for unconditioned and sub-nanosecond laser-conditioned KD2PO4 crystals , 2007, SPIE Laser Damage.

[11]  Zhao Yuanan,et al.  One-on-One and R-on-One Tests on KDP and DKDP Crystals with Different Orientations , 2009 .

[12]  Guillaume Duchateau,et al.  Scaling laws in laser-induced potassium dihydrogen phosphate crystal damage by nanosecond pulses at 3ω , 2008 .

[13]  Michael D. Feit,et al.  Techniques for qualitative and quantitative measurement of aspects of laser-induced damage important for laser beam propagation , 2005 .

[14]  Li Dawei,et al.  Characteristics of 355nm Laser Damage in KDP and DKDP Crystals , 2009 .

[15]  Jarboe,et al.  UCRL-PROC-216743 Wavelength and pulselength dependence of laser conditioning and bulk damage in doubler-cut KH 2 PO 4 , 2005 .

[16]  M. J. Soileau,et al.  Pulse-Width and Focal-Volume Dependence of Laser-Induced Breakdown , 1981 .

[17]  Manyalibo J. Matthews,et al.  The effect of laser pulse duration on laser-induced damage in KDP and SiO2 , 2006, SPIE Laser Damage.

[18]  David Milam,et al.  The effect of baking and pulsed laser irradiation on the bulk laser damage threshold of potassium dihydrogen phosphate crystals , 1982 .

[19]  Jean-Christophe Poncetta,et al.  Accurate measurements of laser-induced bulk damage density , 2009 .

[20]  Jean-Yves Natoli,et al.  Influence of laser beam size and wavelength in the determination of LIDT and associated laser damage precursor densities in KH2PO4 , 2007, SPIE Laser Damage.

[21]  Hisanori Fujita,et al.  Investigation of bulk laser damage in KDP crystal as a function of laser irradiation direction, polarization, and wavelength , 2000 .