Preparation, spectral properties and Judd-Ofelt analysis of Ho3+:YPO4 crystal

YSO4F·H2O: A Deep-Ultraviolet Birefringent Rare-Earth Sulfate Fluoride with Enhanced Birefringence Induced by Fluorinated Y-Centered Polyhedra

“…S exhibits a SO 4 tetrahedron with bond length ranging from 1.444(4) to 1.483(3) Å. The bond lengths are all reasonable and in line with those of observed compounds previously. − [YO 6 F 2 ] polyhedra are bridged by edge-sharings into a one-dimensional (1D) chain (Figure a). The adjacent chains are connected via three O atoms from SO 4 tetrahedra to produce a 2D layer extended in the ab plane.…”

Growth and Spectroscopic Comparison of Monoclinic Er3+:GdPO4 and Tetragonal Er3+:YPO4 Crystals for 1.55 μm Laser Application

“…A RePO 4 crystal can only be grown by the flux method because of its incongruent melting characteristic, and the used flux in many experiments was the lead pyrophosphate Pb 2 P 2 O 7 . , Caused by the strong toxicity and high volatility of the Pb 2 P 2 O 7 flux, only small-sized RePO 4 crystals have been obtained based on the spontaneously nucleated flux method. − ,− For example, only the plate-shaped Nd 3+ :LuPO 4 crystal with dimensions of 10 × 4 × 1 mm 3 and plate-shaped Yb 3+ :YPO 4 crystal with dimensions of 6 × 4 × 0.5 or 5 × 3 × 1 mm 3 can be obtained up to now. , Previous investigation has shown that a flux system containing Li + is favorable for the growth of a bulk GdPO 4 crystal . Li 2 CO 3 and MoO 3 are widely used as fluxes in many crystal growth experiments.…”

“…Depending on the ionic radius of the rare earth element Re, rare earth orthophosphate RePO 4 can be roughly classified into two structures: monoclinic monazite (Re = La to Gd) and tetragonal zircon (Re = Tb to Lu, including Y and Sc) structures . Due to the high thermal conductivity, for example, about 12 W m –1 K –1 for the YPO 4 crystal, RePO 4 crystals have been investigated as solid-state laser host materials. − Efficient 1.0 μm lasers have been achieved in the Nd 3+ or Yb 3+ singly doped LuPO 4 and YPO 4 crystals. ,− Furthermore, the spectral investigations of the Er 3+ :LuPO 4 crystal as well as Er 3+ , Tm 3+ , and Ho 3+ singly doped YPO 4 crystals as potential laser materials have also been reported. ,− However, compared with the tetragonal LuPO 4 and YPO 4 crystals, the investigation of the monoclinic RePO 4 crystal as the laser host is still less. Up to now, only the spectral property of the Er 3+ -doped LaPO 4 crystal and spectral and laser performance of the Nd 3+ -doped GdPO 4 crystal have been reported. ,, Polarized spectral characteristics of the Er 3+ :GdPO 4 crystal and the influence of structure change on the spectral characteristics of the Er 3+ -doped RePO 4 crystals have not been investigated, which are important for evaluating their potentialities as 1.55 μm laser gain media.…”

Studying the Absorption and Fluorescence Parameters of Ho: YAP Laser Using the Judd-Oflet Model

“…• The second step: The numerical integration of the 1.91µm absorption beam was taken from the absorption spectrophotometer. Using (Simpson's rule) (14) . The area under the absorption curve ∫ K(λ )dλ for that beam or band can be calculated by integrating the absorption spectrum.…”

“…We can use special programs developed by (Caird) for Calculating the values of the Spectral parameters as follows (14,15) : https://www.indjst.org/…”