Affiliation:
1. P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Pr., 119991 Moscow, Russia
Abstract
It is shown that the two-photon absorption (TPA)-induced losses in a non-centrosymmetric crystal reduce considerably when the angle θ between the polarization vector of incident radiation and the optical c-axis is 45°. In such a geometry of interaction in a Ca3(VO4)2 crystal, the effective TPA coefficient for 300 fs laser pulses at θ = 45° is 3.5 ± 0.5 times lower than its maximum at θ = 0°, which is more than two times higher than reported earlier in the literature.
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