Variations with laser pulse duration of the thresholds at 350-nm and 1064-nm for bulk damage in crystals of KDP (potassium dihydrogen phosphate)

Conference · Wed Sep 07 04:00:00 EDT 1988

OSTI ID:7014591

Gonzales, R P; Staggs, M C; Singleton, M F; George, D; Weinzapfel, C L; Weinzapfel, S

Five separate laser facilities were used to measure 350-nm and 1064-nm thresholds for bulk damage in crystals of potassium dihydrogen phosphate (KDP). At 1064 nm, tests were made with single laser pulses having durations from 1 to 20 ns and with 9-ns incident at 10 Hz. At 350 nm tests were made with single pulses having durations of 0.6, 5 and 25 ns and with 25-ns pulses incident at rates up to 50 Hz. Over the range from 0.6 to 25 ns, 350-nm thresholds increased by factors of approximately 2 to 3, and 350-nm thresholds were almost independent of laser repetition rate. The 1064-nm thresholds increased by a factor of 2 as pulse duration increased from 1 to 20 ns. Laser hardening of thresholds at 1064-nm was observed after hardening at both 350 nm and 1064 nm.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7014591
• Report Number(s): UCRL-95284; CONF-8611154-4; ON: DE89001355
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
ALKALI METAL COMPOUNDS
CRYSTAL STRUCTURE
DAMAGE
ELECTROMAGNETIC RADIATION
HARDENING
LASER RADIATION
PHYSICAL RADIATION EFFECTS
POTASSIUM COMPOUNDS
RADIATION EFFECTS
RADIATION HARDENING
RADIATIONS