Microscopic fluorescence imaging of bulk defect clusters in KH(2)PO(4) crystals.

A microscopic fluorescence imaging system is used to detect optically active centers located inside a transparent dielectric crystal. Defect centers in the bulk of KH(2)PO(4) crystals are imaged based on their near-infrared emission following photoexcitation. The spatial resolution of the system is 1mum in the image plane and 25mum in depth. The experimental results indicate the presence of a large number of optically active defect clusters in different KH(2)PO(4) crystals, whereas the concentration of these clusters depends on the crystal sector and growth method.

[1]  J. A. Paisner,et al.  The National Ignition Facility Project , 1994 .

[2]  Natalia P. Zaitseva,et al.  Rapid growth of large-scale (40–55 cm) KH2PO4 crystals , 1997 .

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

[4]  C. Pan,et al.  Raman scattering of high-temperature phase transition in KH2PO4 , 1975 .

[5]  Stavros G. Demos,et al.  Raman scattering investigation of KH2PO4 subsequent to high fluence laser irradiation , 1998 .

[6]  Michael J. Runkel,et al.  Investigation of impurities and laser-induced damage in the growth sectors of rapidly grown KDP crystals , 1997, Laser Damage.

[7]  J. Comins,et al.  Halogen defect aggregation in KI irradiated between 195 K and 295 K , 1992 .

[8]  Tadashi Kanabe,et al.  Optical properties of rapidly grown KDP crystal improved by thermal conditioning , 1997 .

[9]  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 .

[10]  Ming Yan,et al.  Photothermal mapping of defects in the study of bulk damage in KDP , 1998, Laser Damage.

[11]  M. Zaiser,et al.  A mesoscopic approach to radiation-induced defect aggregation in alkali halides stimulated by the elastic interaction of mobile Frenkel defects , 1994 .

[12]  A. Gektin,et al.  Point Defect Interactions and Vacancy Cluster Formation in Alkali Halide Crystals , 1992 .

[13]  J. Vail.  Theory of electronic defects: Applications to MgO and alkali halides , 1990 .

[14]  Shen,et al.  Laser heating of free electrons in wide-gap optical materials at 1064 nm. , 1989, Physical review letters.

[15]  Ming Yan,et al.  Hydrogen atoms in KH 2 PO 4 crystals , 1998 .