Spectroscopic properties of Yb-doped CaF₂–YF₃solid-solution laser crystal

Abstract

The spectroscopic properties of Yb:CaF 2 -YF 3 disordered crystals obtained by the vertical Bridgman method were studied. The 3 at.% Yb, 3 at.% Y:CaF 2 crystal absorption cross section σ abs centered at 974 nm reached 7.2 × 10 −21 cm 2 and the fluorescence lifetime was 3.54 ms at room temperature. Experimental results show that co-doping Y 3+ ions at different Y:Yb ratios can modulate the spectroscopy and lengthen the luminescence lifetime of Yb 3+ ions in the CaF 2 lattice. There are three main kinds of lattice in the 3 at.% Yb, 3 at.% Y:CaF 2 crystal, as concluded from the low-temperature spectra.

Picosecond pulse generation from a Yb:CaF2–YF3 mode-locked laser

“…Picosecond pulse generation from a Yb:CaF 2 -YF 3 mode-locked laser ions clusters and increasing the local crystal field strength of the Yb 3+ ions. Spectroscopic properties of this combination (Yb:CaF 2 -YF 3 ) are studied, with a larger absorption cross section, higher emission intensity, and longer emission lifetime [23]. From [23], we can see that the proportion between YbF 3 and YF 3 in crystals is important, which can influence spectroscopic properties of this combination.…”

Refinement of the Congruently Melting Composition of Nonstoichiometric Fluorite Crystals Ca1-xYxF2x (x = 0.01–0.14)

“…In [17,18], a commercial (Merk, Darmstadt) CaF 2 reagent with a parameter of 5.4630(2) Å was used as a charge. In [14], the parameter 5.46295 (10) Å from [20] was used to calculate the dependence. The concentration dependence of the lattice parameter has the form: a(x) = a o + kx, where a o = 5.46385 (5), k = 0.1999(4).…”

“…The Ca 1-x Y x F 2+x crystals as active media for lasers were first proposed [5] in 1965, and today, interest in them still remains [6]. The spectroscopic properties of Nd 3+ [7,8], Tm 3+ [9] and Yb 3+ [10] doped Ca 1-x Y x F 2+x solid solution crystals were studied.…”

Crystal growth, spectral properties and Judd–Ofelt analysis of Pr: CaF2-YF3 *

“…Therefore, a mixed crystal of CaF 2 -ReF 3 (Re = Y, La, Gd, Lu) is proposed to replace the usual CaF 2 single crystal. [8] When x is greater than 0.1, the (CaF 2 ) 1−x -(YF 3 ) x system exhibits the broad emission spectrum characteristics of glass. [9] The degree of disorder of the structure is mainly controlled by the variation of the Y 3+ concentration.…”