Lead fluoride crystals doped with YbF₃, NaF or KF- codoped were grown using the vertical Bridgman method. Room-temperature absorption, photoluminescence spectra, fluorescence lifetimes and laser performance belonging to the transitions between ground state ²F_7/2 and the excited state ²F_5/2 of Yb³⁺ ions in these crystals have been investigated. Influence of the codoping with Na⁺ and K⁺ ions on the distribution coefficients, X-ray photoelectron spectrometry, absorption spectra and emission spectra of the Yb ions has been studied. With a 2 mol% Yb³⁺ and Na⁺-codoped sample we obtained 2.65 W output power at 1045 nm for 7.5 W of incident power at 976 nm. The laser wavelength could be tuned from 1017 to 1078 nm, showing the great potential of Yb, Na: PbF₂ as an amplifier medium for femtosecond pulses.

1. POSTER: Crystal growth, spectroscopic characterization and laser performance of Yb-doped lead fluoride crystals, PDF document, version 1.5, 0MB

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