Abstract
Differential gain spectra in the range 295–335 nm were measured in crystals of scheelite structure LiY1 − x Lu x F4 (x = 0–1), doped by Ce3+ ions. It is shown that variation of Lu3+ and Y3+ ions relative content in LiY1 − x Lu x F4 crystals allows to manipulate the spectral width of the amplification band. Cross-sections of excited-state absorption at the wavelengths of Ce3+ luminescence, probability ratios of formation and thermal destruction of color centers depending on the Y3+ ions content in LiY1 − x Lu x F4 crystals were estimated. Even better gain characteristics have been demonstrated by LiLuF4:Ce3+, doped by Yb3+ ions. The highest optical gain coefficient with a wide amplification band among studied samples was observed in LiLuF4:Ce3+ crystal, codoped by Yb3+ ions.
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