Laser-induced damage threshold of ZnGeP 2 crystal for (sub)picosecond 1-µm laser pulse
The laser-induced damage threshold (LIDT) was measured for a crystal exposed to 0.3-9.5 ps 1030-nm laser pulses. Single-pulse LIDT fluence was ∼0.22 / for the laser pulse widths of 0.3-3.5 ps and increased until 0.76 / for 9.5-ps pulses. Multi-pulse LIDT fluence for 0.3-ps pulses at repetition frequ...
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Published in | Applied optics. Optical technology and biomedical optics Vol. 62; no. 1; p. 16 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.01.2023
|
Online Access | Get more information |
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Summary: | The laser-induced damage threshold (LIDT) was measured for a
crystal exposed to 0.3-9.5 ps 1030-nm laser pulses. Single-pulse LIDT fluence was ∼0.22
/
for the laser pulse widths of 0.3-3.5 ps and increased until 0.76
/
for 9.5-ps pulses. Multi-pulse LIDT fluence for 0.3-ps pulses at repetition frequencies in the range of 100 Hz-1 kHz was ∼0.053
/
and decreased further at higher, multi-kHz, pulse repetition frequencies. The coating of the
crystal surface with an anti-reflection multi-layer thin film increased the multi-pulse LIDT by one order of magnitude, up to 0.62
/
(about 2
/
). The significant increase in LIDT coupled with a decrease in reflection losses provides a way to cardinally improve efficiency of frequency conversion of popular 1-µm ultrashort pulses into mid- and far-IR ranges with a thin AR-coated
crystal sample. |
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ISSN: | 2155-3165 |
DOI: | 10.1364/AO.475336 |