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Er:YLF Fluoride Crystal

03 Jul 2020

Description

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

Parameter

 
Orientation A-cut
Parallelism <10〞
Perpendicularity <10ˊ
Surface Quality 10-5 S-D
Wavefront Distortion <λ/4 per inch@632.8 nm
Surface Flatness <λ/10 @632.8 nm
Clear Aperture >90%
Face Dimensions Tolerance +0.0/-0.1 mm
Length Tolerance ±0.1mm
Chamfer <0.1mm@45°
 
 
Structure Symmetry Tetragonal
Lattice Constants a=5.173, c=10.747 Å@1.5%
Specific mass 3.95g/cm3
Melting Point 819°C
Thermal Conductivity /(W·m-1·K-1) ~5
Specific Heat(J·g-1·K-1) 0.79
Thermal Expansion /(10-6·K-1 ) 8
Hardness (kg/mm2@Mohs) 5
Young`s Modulus /(108g/cm2) 7.65
 
 
Typical Doping Level 15@.%
Refractive Index (@2070nm) no=1.442, ne=1.464
Thermo-optic Coefficient(10-6·K-1) -2(∥a), -4.1(∥c)
Lifetime of 4I11/2 Erbium Energy Level(ms) 4
Emission Cross Section(10-20/cm2) 1.5@2800nm
Absorption Peak Wavelength 972nm
Absorption Coefficient at Peak Wavelength 28cm-1
Absorption Bandwidth at Peak Wavelength ~1nm
Laser Wavelength 2810nm

Absorption and Emission Spectrum

Feature

  • 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

  • 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)

CONTACT DETAILS
Nanjing Crylink Photonics Co.,Ltd
No.3, Hengda Road, Economic and Technological Development Zone, Nanjing, China
No.200,Zhaoxian Road,Jiading District,Shanghai City
Nanjing
Jiangsu
210038
China
Tel: (86)025-68790684
Fax: (86)025-68790685
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