Laser annealing characteristics of multiple bulk defect populations within DKDP crystals

Laser annealing by pre-exposure to subdamage threshold laser pulses is a well-established method to increase the damage performance of bulk KH2PO4 and KDxH2−xPO4 nonlinear optical materials. The origin of laser-induced damage is believed to be localized absorption by a defect structure, either a light-absorbing foreign nanoparticle or a cluster of stoichiometric defects. It has been recently shown that there are at least three populations of such defect structures in these materials in which pre-exposure to laser pulses of specific fluence and wavelength results in a measurable reduction in their number density or decrease in their susceptibility to damage. In this work, we investigate the annealing characteristics of these three populations of defect structures in DKDP under variable irradiation conditions. The aim is to understand the similarities and differences between these populations in the way they interact with laser light. The results depict distinct behaviors that reveal information on the rela...

[1]  Stavros G Demos,et al.  Laser-induced defect reactions governing damage initiation in DKDP crystals. , 2006, Optics express.

[2]  S G Demos,et al.  Multiwavelength investigation of laser-damage performance in potassium dihydrogen phosphate after laser annealing. , 2005, Optics letters.

[3]  S G Demos,et al.  Investigation of laser annealing parameters for optimal laser-damage performance in deuterated potassium dihydrogen phosphate. , 2005, Optics letters.

[4]  Stavros G. Demos,et al.  System for evaluation of laser-induced damage performance of optical materials for large aperture lasers , 2004 .

[5]  Stavros G. Demos,et al.  Electronic structure calculations of an oxygen vacancy in KH2PO4 , 2005 .

[6]  H. Endert,et al.  Laser-Induced Damage in KDP Crystals. The Influence of Growth Ghosts and Growth Bands , 1982, November 16.

[7]  Michael D. Feit,et al.  Size-selection initiation model extended to include shape and random factors , 2005, SPIE Laser Damage.

[8]  S G Demos,et al.  Electron- or hole-assisted reactions of H defects in hydrogen-bonded KDP. , 2003, Physical review letters.

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

[10]  Robert S. Hughes,et al.  Investigation of optically generated transient electronic defects and protonic transport in hydrogen-bonded molecular solids. Isomorphs of potassium dihydrogen phosphate , 1993 .

[11]  Stavros G. Demos,et al.  Differentiation of defect populations responsible for bulk laser-induced damage in potassium dihydrogen phosphate crystals , 2006 .

[12]  A. K. Burnham,et al.  Developing KH2PO4 and KD2PO4 crystals for the world's most power laser , 2002 .

[13]  David Milam,et al.  Laser conditioning study of KDP on the optical sciences laser using large area beams , 1998, Laser Damage.

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

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

[16]  Mark A. Henesian,et al.  Ultraviolet-induced transient absorption in potassium dihydrogen phosphate and its influence on frequency conversion , 1994 .

[17]  Christopher W. Carr,et al.  Effect of temporal pulse shape on optical damage , 2006 .

[18]  Donald R Uhlmann,et al.  Mechanism of Inclusion Damage in Laser Glass , 1970 .

[19]  Michael D. Feit,et al.  Wavelength and pulselength dependence of laser conditioning and bulk damage in doubler-cut KH2PO4 , 2005, SPIE Laser Damage.

[20]  Stavros G. Demos,et al.  Investigation of optically active defect clusters in KH2PO4 under laser photoexcitation , 1999 .

[21]  Michael D. Feit,et al.  Implications of nanoabsorber initiators for damage probability curves, pulselength scaling, and laser conditioning , 2003, SPIE Laser Damage.

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

[23]  H. Endert,et al.  Influence of Dislocations in KDP Crystals on Laser Damage Threshold , 1981 .

[24]  Stavros G. Demos,et al.  Bulk defect formations in KH2PO4 crystals investigated using fluorescence microscopy , 2003 .

[25]  W. Fowler,et al.  Oxygen vacancy model for the E1′ center in SiO2 , 1974 .