Birefringence and Anisotropy of the Losses Due to Two-Photon Absorption of Femtosecond Pulses in Crystals

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 coeff...

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Bibliographic Details
Published in:Photonics 2024-07, Vol.11 (7), p.683
Main Authors: Kovalev, Valeri, Krasin, George
Format: Article
Language:English
Subjects:
Absorption
Anisotropy
Birefringence
Crystals
Femtosecond pulses
Incident radiation
Lasers
Optics
Photon absorption
Photons
Propagation
Radiation
two-photon absorption
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Summary: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.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics11070683