Absorption cross-section determination of F2 colour centres in a LiF crystal by picosecond laser saturable absorption studies

Taiju Tsuboi; O. Lammel; Alfons Penzkofer

doi:10.1117/12.524909

19 November 2003 Absorption cross-section determination of F₂ colour centres in a LiF crystal by picosecond laser saturable absorption studies

Taiju Tsuboi, O. Lammel, Alfons Penzkofer

Author Affiliations +

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.524909
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

The saturable absorption behavior of F₂^- color centers in LiF is studied by picosecond laser pulse excitation (wavelength λ_L = 1054 nm, duration Δt_L = 6 ps). The color center number density, N₀, the ground-state absorption cross-section, σ_L, and the single-photon excited-state absorption cross-section, σ_ex,L, are determined by numerical fitting the energy density dependent energy transmission. A decrease of energy transmission at high excitation energy densities (w₀_L > 1 J cm^-2) is attributed to two-photon absorption of other color centers (N₁ and N₂ bands of F₄ centers) present in the sample.

Citation Download Citation

Taiju Tsuboi, O. Lammel, and Alfons Penzkofer "Absorption cross-section determination of F₂ colour centres in a LiF crystal by picosecond laser saturable absorption studies", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.524909

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