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Arminas Butkus +370 5 219 4884
Pr:YLF crystals
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Pr:YLF crystals

Main features

 

  • High absorption and emission cross-sections(~10-19 cm2)
  • Good overlapping of the absorption band in the blue spectral region with
    the emission
  • Lines of the InGaN laser diodes and 2ω-OPSL
  • Custom crystals available upon request

 

Application examples

 

  • Diode-pumped solid-state lasers for precise and efficient processing of
    metals such as copper or gold, entertainment industry and science
Request custom
  • Description
  • Properties
  • Absorption and emission curves
  • Standard specifications

Only few laser materials have necessary properties for realization of lasing in visible spectral range. Trivalent praseodymium (Pr3+) is known to be an interesting laser ion for using with solid-state lasers in the visible spectral range because of its energy levels scheme, providing several transitions in the red (640 nm, 3P0 to 3F2), orange (607 nm, 3P0 to 3H6), green (523 nm, 3P0 to 3H5), and dark-red (720 nm, 3P0 3F3+3F4) spectral regions. Pr3+:YLF has been found as promising laser material for producing visible lasers directly.

Spectroscopic and thermo-mechanical properties
Absorption peak wavelength 444 nm
Absorption cross-section at peak 8×10-20 cm2
Absorption bandwidth at peak wavelength ~5 nm
Laser wavelength 640 nm
Lifetime of 3P0 energy level 50 μs
Emission cross-section 20×10-20 cm2
Refractive index @1064 nm no=1.448, ne=1.470
Crystal structure tetragonal
Density 3.95 g/cm3
Mohs hardness 5
Thermal conductivity 6 Wm-1K-1
dn/dT -5.2×10-6 (||c) K-1, -7.6×10-6 ((||a) K-1
Thermal expansion coefficient ~16×10-6 K-1
Typical doping level <1 at.%

Pr:YLF crystals
Orientation a-cut
Clear aperture >90%
Face dimensions tolerance +0/-0,1 mm
Length tolerance ±0,1 mm
Parallelism error <10 arcsec
Perpendicularity error <10 arcmin
Protective chamfers <0,1 mm at 45˚
Surface quality 10-5 S-D
Surface flatness <λ/[email protected],8 nm
Wavefront distortion λ/[email protected],8 nm 
Coatings R<1% @440-444 nm + R<0,6% @500-700 nm on both faces
Laser induced damage threshold >5 J/cm2@532 nm, 10 ns
Mount Unmounted
Order your item
Face dimensions Length End faces Doping Coatings SKU price quantity
2x2 mm
6 mm
Right-angle cut
0,5%
AR/[email protected] nm+500-700 nm
7793
480 €
3x3 mm
6 mm
Right-angle cut
0,5%
AR/[email protected] nm+500-700 nm
7794
540 €
⌀5 mm
6 mm
Right-angle cut
0,5%
AR/[email protected] nm+500-700 nm
7795
540 €