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You are here: Home / Fluoride Crystal / Ce:LiCAF

Ce:LiCAF is perhaps the most extensively studied as a laser and amplifier material because of the absence of color center formation and solarization effects, therefore enabling high-power UV emission. Efficient UV generation through lasing techniques and/or amplification heavily relies on crystal quality and pumping configuration. The gain spectra of Ce:LiCAF is in the range 280–320 nm and is characteristic of the Ce3+ 5d1–4f1 interconfigurational transition. Ce3+-doped colquiriite LiCaA1F6 single crystals (LiCAF:Ce) are not only excellent u.v. fluorescers, but they also exhibit broadband tunable gain in u.v. under pulsed pumping at 266nm. UV solid-state laser materials that are continuously tunable over 4000cm−1, such as and Ce:LiCAF, could service numerous scientific, engineering, and medical applications. This material may also be suited to remote-sensing applications, since molecules such as ozone and aromatic-based compounds have characteristic absorption bands in the UV. For example, the UV tunability provided by Ce:LiCAF could serve as the basis for a UV differential-absorption lidar system that would have the versatility of continuously variable wavelengths. The reliability, compactness, nontoxicity, and high efficiencies offered by solid-state lasers provide many advantages over other tunable coherent ultraviolet sources, such as frequency-doubled dye lasers. Applications in inhospitable environments may also be rendered more practical with an all-solid-state UV source.

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Parameter

Material and Specifications
Orientation Tolerance5ˊ
Parallelism<10〞
Perpendicularity5ˊ
Chamfer0.1mm@45°
Surface Quality10/5 or better
Wavefront Distortionλ/8 @632.8 nm
Surface Flatnessλ/10 @632.8 nm
Clear Aperture>95%
Diameter Tolerance+0/-0.05mm
Length Tolerance±0.1mm
CoatingsAs per requirement
Dopant Concentration Tolerance0.10%
Physical and Chemical Properties
Crystal StructureTrigonal
Space GroupP31C
Lattice Constantsa=4.9808, c=9.6052Å@1mol%CeF3
Density (g/cm3)2.94
Melting Point766°C
Thermal Conductivity(W·m-1·K-1)3.09-2.9
Thermal Expansion(10-6K-1)24.3(∥a), 2.7(∥c)
Optical Characteristics
Absorption Peak Wavelength(nm) 640
Absorption Cross-section(10-18cm2)@266nm 7.3(π), 5.8(σ)
Absorption Coefficient@266nm4cm-1
Refractive Indexn=1.41
Laser Wavelength(nm)266
Fluorescence Lifetime(μs)25
Spontaneous Emission Constant(10-10cm·s-2)0.2
Emission Cross-section(10-18cm2)@290nm9.6(π), 6.2(σ)
Laser Threshold(μJ)15-25
Estimated Pumping Efficiency50(π), 33(σ)
ESA Cross-section(10-18cm2)@266nm5.5π), 6.2(σ)
Gain Cross-section(10-18cm2)@290nm6.0(π), 4.0(σ)
Saturation Fluence(mJ/cm2)115
Spectrum

Feature
Application
Literature
Feature
  • The gain spectra of Ce:LiCAF are in the range 280–320 nm
  • Characteristic of the Ce3+5d1–4f1 interconfigurational transition
  • Absence of solarization effects
  • Transparency, tolerance to laser-induced damage
  • o be directly pumped
  • Can be directly pumped at 266 nm by the fourth harmonic generation of Nd:YAG laser
  • Broad UVtunability (from 280 to 325 nm)
Application
  • Scintillator
  • Tunable ultraviolet lasers
  • Remote-sending applications
  • Ultrafast pulse generation and amplification
  • Power UV laser amplifiers
Literature
Al 2 O 3 /SiO 2 and HfO 2 /SiO 2 dichroic mirrors for UV solid-state lasers
Ce : LiSrAl& laser performance with antisolarant  pump beam
Crystal growth and dopant segregation of Ce:LiSrAlF 6 and Eu:LiSrAlF 6 crystals with high dopant concentrations
A-10-kHz-Ce-LiSAF-laser-pumped-by-the-sum-frequency-mixed_ output of a copper vapour laser
Crystal growth and optical properties of indium doped LiCaAlF 6 scintillator single crystals
Crystal growth and scintillation properties of Ce and Eu doped LiSrAlF 6
Wavelength-shifting fiber signal readout from Transparent Rubber SheeT (TRUST) type LiCaAlF 6 neutron scintillator
Study of the correlation of scintillation decay and emission wavelength
Single crystals with advanced laser properties LiCaAlF 6 :Ce 3+ grown by Bridgman technique
Neutron–gamma discrimination based on pulse shape discriminatioN in a Ce:LiCaAlF 6 scintillator

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