Jan Vanda, Jan ˇSevˇcík, Egidijus Pupka, Mindaugas ˇS ˇciuka, Andrius Melninkaitis, Martin Divok′y, Venkatesan Jambunathan, Stefano Bonora, V′aclav ˇSkoda, Antonio Lucianetti, Danijela Rostohar, Tomas Mocek, Valdas Sirutkaitis. Comparative LIDT measurements of optical components for high-energy HiLASE lasers[J]. High Power Laser Science and Engineering, 2016, 4(1): 01000e11
- High Power Laser Science and Engineering
- Vol. 4, Issue 1, 01000e11 (2016)
Fig. 1. Schematics of laser systems developed at HiLASE project and respective LBDSs.
Fig. 2. Block scheme of the LIDT testing setup at LIDARIS.
Fig. 3. Mirror surface; (a) map of exposure sites, red are noted as damaged according to the scattering light detection; (b) surface of damaged sample by Nomarski microscopy; (c) the sample surface superimposed with the map; (d) the corrected map of sites after the optical inspection.
Fig. 4. Damage threshold curves for AR-coated windows tested with ns pulses.
Fig. 5. Microscope images of sample 15 sites 69 and 200, marked as damaged, with notable scratches and dents not caused by laser.
Fig. 6. Damage threshold curves for HR dielectric mirrors tested with ns pulses.
Fig. 7. Damage threshold curves for mirrors tested with ps pulses.
Fig. 8. Damaged coating of the sample 10 (AR-coated window), where the sample was exposed to ns pulse trains; (a) the marked area of interest, (b) (from upper left) the site 47 (2 pulses at energy $170~\text{J}~\text{cm}^{-2}$ ); the site 48 (4 pulses at energy $170~\text{J}~\text{cm}^{-2}$ ); the site 42 (96 pulses at energy $170~\text{J}~\text{cm}^{-2}$ ); (c) a close look at the site 42; (d) 3D height topology (wire surface) of the site 42.
Fig. 9. Damaged coating of the sample 03 (the hybrid mirror), the sample was exposed to the train of ps pulses; (a) the marked area of interest, (b) the site 276 (407 pulses at the energy $1.47~\text{J}~\text{cm}^{-2}$ ); (c) the close look to the site 276; (d) 3D height topology (wire surface) of the site 276.
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Table 1. Conditions for testing with nanosecond pulses.
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Table 2. List of components tested at ns regime.
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Table 3. Conditions for testing with picosecond pulses.
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Table 4. List of components tested at ps regime.
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Table 5. Damage thresholds of AR-coated windows; linearly extrapolated values were rounded down to closest integer.
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Table 6. Damage thresholds of HR dielectric mirrors, linearly extrapolated values were rounded down to the closest integer.
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Table 7. Damage thresholds of mirrors, linearly extrapolated values were rounded down to two decimals.
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