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You are here: Home / Fluoride Crystal / Cr:LiSAF

Cr3+:LiSAF gain medium possesses broad emission bands in the near infrared that allow widely tunable laser operation and generation of ~10 fs light pulses via mode-locking technique. Cr:LiSAF crystals can be grown with a very low loss level (0,2%/cm) and it enables to construct high-Q-cavities, resulting in lasing thresholds as low as 2 mW and slope efficiencies above 50%. Moreover, nonlinear refractive index of Cr:LiSAF is about four times lower than Ti:sapphire, which reduces unwanted nonlinearities in ultrashort pulse generation and amplification. It’s excellent laser material with high energy storage and high slope efficiency. It’s also ideal working materials under conditions of ultra short pulse and ultra high power. Currently, Cr:LiSAF related products such as flashlight pumping and semi-conductor pumping laser have been widely used.

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Parameter

Material and Specifications
Orientationa-cut
Parallelism<10〞
Perpendicularity10ˊ
Chamfer0.1mm@45°
Surface Quality10-5 S-D
Wavefront Distortionλ/8 @632.8 nm
Surface Flatnessλ/10 @632.8 nm
Clear Aperture>90%
Face Diameter Tolerance+0/-0.1mm
Length Tolerance±0.1mm
CoatingsR<1%@670nm+R<0.5%@700~1100nm on both faces
Laser Induced Damage Threshold>10J/cm2@1064nm, 10ns
Physical and Chemical Properties
Crystal StructureTrigonal
Space GroupP31C
Lattice Constantsa=5.08, c=10.21 Å
Density (g/cm3)3.45
Melting Point766°C
Mohs Hardness4
Modulus of Elasticity(GPa)109
Specific Heat(J/gK@298K)0.842
Thermal Conductivity(W·m-1·K-1)4.6(∥a), 5.1(∥c)
Thermal Expansion(10-6K-1)2.2(∥a), 3.6(∥c)
Typical Doping Level0.8~1.5@.%
Optical Characteristics
Absorption Peak Wavelength(nm) 670
Absorption Cross-section at Peak(10-20cm2) 5.5
Absorption Bandwidth at Peak Wavelength~100nm
dn/dT (10-6K-1)-4.2(no), -4.6(ne)
Refractive Indexn=1.41
Laser Wavelength(nm)830(780-920)
Lifetime of 4T2 Energy Level(μs)67
Emission Cross-Section(10-20cm2)5
Scatter Losses(%/cm)<0.2
Index of Refraction
λ(nm)ncna
8461.4071.405
6701.4091.407
4231.4131.412
2901.421.42
2661.4221.424
Spectrum

Feature
Application
Literature
Feature
  • Broad absorption and emission bands
  • Nonlinear refractive index is about four times lower than Ti:sapphire
  • Custom crystals available upon request
Application
  • Femtosecond lasers and CPA laser systems
  • Flashlight pumping and semi-conductor pumping laser
Literature
430nm DPSS blue laser generated by sum-frequency mixing
2-D fluorescence lifetime imaging using a time-gated image intensifier
A diode-pumped, self-starting, all-solid-state self-mode-locked Cr:LiSGAF laser
A novel detection system for laser cooling of ortho-positronium
Compact single-frequency diode-pumped Cr:LiSAF lasers
Cr:Colquiriite Lasers: Current status and challenges for further progress
Diode-pumped broadly tunable 809–910 nm femtosecond Cr:LiSAF laser
Diode pumped, frequency doubled LiSAF microlaser
Diode-pumped, Q-switched, 1.321 pm Nd:YLF laser and its frequency doubling
Diode-pumped,single-frequency,Cr: LiSAFcoupled-cavity microchiplaser

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Reader Interactions

Comments

  1. Eberhard Riedle says

    December 17, 2020 at 06:14

    I’m looking for an undoped LiSAF crystal,

    – diameter 5 mm, thickness 5 mm

    or

    – diameter 1/”, thickness 5 mm

    or

    diameter 1″, thickness 5 mm

    all with optically polished faces.

    Reply

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