Impurity and laser-induced damage in the growth sectors of rapidly grown DKP crystals

Conference · Thu Feb 13 04:00:00 EST 1997

OSTI ID:492016

Yan, M; Torres, R; Runkel, M; Woods, B; Hutcheon, I; Zaitseva, N; DeYoreo, J

We report the experimental results of impurity contamination and laser-induced damage investigations on rapidly grown potassium dihydrogen phosphate (KDP) crystals. Using absorption spectroscopy and chemical analysis, we determined the impurity distribution in the different growing sectors of KDP single crystals. The level of impurity was dependent on starting materials and growth rate. We also studied influence of impurities on laser-induced damage in fast grown KDP. The laser damage threshold (LDT) in the impurity-rich prismatic sector is same as in the high purity pyramidal sector within experimental error. Meanwhile, the LDT at the boundary of the prismatic and pyramidal sectors is less than half of that in the bulk. Furthermore, we found that the thermal annealing of the crystal eliminated the weakness of this sector boundary and increased its LDT to the same level as in the bulk of the crystal. Result suggests that the laser damage occurred in the vicinity of a high; localized strain field.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 492016
• Report Number(s): UCRL-JC--126804; CONF-961070--16; ON: DE97052682
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
CRYSTAL GROWTH
DAMAGE
IMPURITIES
LASER MATERIALS
LASER RADIATION
MONOCRYSTALS
NEODYMIUM LASERS
POTASSIUM PHOSPHATES