Two-photon-absorption of frequency converter crystals at 248 nm |
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| Authors: | M Divall K Osvay G Kurdi EJ Divall J Klebniczki J Bohus Á Péter K Polgár |
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| Institution: | (1) Dept. of Optics and Quantum Electronics, University of Szeged, 406, Szeged, 6701, Hungary;(2) Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OXON OX11 0QX, UK;(3) HAS Research Group on Laser Physics, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary;(4) Dept. of Mathematics and Physics, Kecskemét College, 91, Kecskemét, 6000, Hungary;(5) Department Experimental Physics, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary;(6) Research Institute for Solid State Physics and Optics, H.A.S., 49, Budapest, 1525, Hungary |
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| Abstract: | The two-photon-absorption coefficient of KDP, BBO, LTB, and CLBO crystals has been determined from the measurement of the
intensity dependent transmission through long samples. The intensity of the sub-picosecond KrF excimer laser pulses on the
samples was varied from 0.2–80 GW/cm2. The linear absorption of the samples was determined by using a low intensity, long pulse KrF laser. The first-principle
simulations to the experimental data show a TPA value of 0.48 cm/GW for KDP, 0.5 cm/GW (o-ray) and 0.34 cm/GW (e-ray) in BBO,
0.22 cm/GW in LTB and 0.53 cm/GW in CLBO.
PACS 78.20.Ci; 42.65.Ky; 42.65.Yj |
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