Nonlinear processes in UV optical materials at 248 nm |
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| Authors: | Hata K. Watanabe M. Watanabe S. |
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| Affiliation: | (1) The Institute for Solid State Physics, The University of Tokyo, Roppongi 7-22-1 Minatoku, 106 Tokyo, Japan |
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| Abstract: | Nonlinear processes in UV optical materials were investigated by using 280-fs, 248-nm pulses. Nonlinear absorption in CaF2 was confirmed to be a two-photon process by using the luminescence of self-trapped excitons, which was also used for the single shot pulse width measurement. The absorption bands due to F centers were identified in CaF2, MgF2, and LiF after several hundred shots at 100 GW/cm2. Absorption at 248 nm was considerable especially in MgF2 and LiF. Self-focusing and self-phase modulation were observed in CaF2. |
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| Keywords: | 42.55.Gp 42.55.Rz |
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