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

Main features

 

  • A low phonon frequency
  • Long lifetimes of the laser emitting levels
  • Wide transparency range (from the VUV to the 10 µm region)
  • Negative thermo-optic coefficient
  • Custom crystals available upon request

 

Application examples

 

  • CW and Q-switched ~3 μm lasers for oral surgery, dentistry, implant dentistry, and otolaryngology
  • Up-conversion visible lasers for display technology, medicine (diagnosis and treatment)
Request custom
  • Description
  • Properties
  • Absorption and emission curves
  • Standard specifications

Er3+:YLF crystals are characterized by a low phonon frequency, which decreases the probability of non-radiative multi-phonon relaxations, therefore increases the luminescence quantum efficiency. A long lifetime of laser emitting levels allow higher energy storage, which is useful for the Q-switch lasing regime. A high bandgap along with low phonon energy leads to a very wide transparency range, which is possibly from VUV to 10 µm region. Negative Er3+:YLF thermo-optic coefficient is an advantage since it reduces the thermal-lensing effect and improves beam shape as well as stability at high average pump power.

Spectroscopic and thermo-mechanical properties
Absorption peak wavelength 972 nm
Absorption coefficient at a peak wavelength 28 cm-1
Absorption bandwidth at a peak wavelength ~1 nm
Laser wavelength 2810 nm
Lifetime of 4I11/2 erbium energy level 4 ms
Emission cross-section @2800 nm 1,5 × 10-20 cm2
Refractive index @2070 nm n0=1,442, ne=1,464
Crystal structure Tetragonal
Density 3,95 g/cm3
Mohs hardness 5
Thermal conductivity ~5 Wm-1K-1
dn/dT -2 × 10-6 (//a) K-1, -4,1 × 10-6 (//c) K-1
Thermal expansion coefficient 8 × 10-6 K-1
Typical doping level 15 at.%

Er:YLF crystals
Orientation a-cut
Clear aperture >90%
Face dimensions tolerance +0,0/-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/10@632,8 nm
Coatings Uncoated, coatings available upon request
Mount Unmounted
Order your item
Face dimensions Length End faces Doping Coatings SKU PRICE QUANTITY
5x5 mm
5 mm
Brewster cut
15%
uncoated
7842
540 €
⌀5 mm
5 mm
Brewster cut
15%
uncoated
7843
540 €