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You are here: Home / Laser Products / Laser Crystal / Er:YLF

Er: YLF

Description
Feature
Application
Reference
News
Description

Er: YLF Crystal has good absorption property on 1730nm Wavelength. Er: YLF Crystal can not only be used to implement LD pumped low-threshold lasers. Still can use passive tuning Q Er: YLF Lasers to realize 3 mj nanosecond pulse of energy. Trivalent Er in the Er: YLF laser can provide convenient spectrum of room temperature solid state laser light sources in the safe area of the eye. Moreover, the transition of 4S3/2 to 4I9/2 based laser source Er provides a four-level transition in the spectral region safe for the human eye, which can operate at room temperature. Er: YLF Crystal is attracting more and more attention from people.

Er:YLF Crystal —— Pulse‐Energy‐Enhanced, Strongly Modulated Er:YLF Laser for Medical Applications

YLF Crystal can be used in laser emission at a wavelength of 3000nm, which can be strongly absorbed by water molecules. This property enables it to be used in laser surgery, and it can also be used in lidar detection. For these applications, a good Er laser pump source is essential.

Feature
  • Wide transparency range
  • In the safe wavelength region of the human eye
  • A low phonon frequency
  • Long lifetimes of the laser emitting levels
Application
  • Pulse‐Energy‐Enhanced, Strongly bonded Er: YLF Lasers are used in the medical sector
  • Pulse‐Energy‐Enhanced, Strongly bonded Er: YLF Lasers are used in the Laser radar
  • LD pumped low-threshold lasers.
  • passive tuning Q Er: YLF Lasers
  • 1730 nm Er: YLF laser resonance pump
Reference
News

Parameter

Material and Specifications
OrientationA-cut
Parallelism<10〞
Perpendicularity <10′
Surface Quality 10-5 S-D
Wavefront Distortion <λ/4 per inch@632.8 nm<λ/4 per inch@632.8 nm
Surface Flatness <λ/8 @632.8 nm<λ/8 @632.8 nm
Clear Aperture >90%>90%
Face Dimensions Tolerance+0/-0.1 mm
Chamfer0.1mm@45°
Length Tolerance ±0.1mm
Physical and Chemical Properties
Lattice Constantsa=5.173,
c=10.747 Å@1.5%
Specific mass3.95g/cm3
Melting Point819°C
Thermal Conductivity /(W·m-1·K-1)~5
Mohs Hardness 5
Thermal Expansion / 10-6·K-1)8
Structure SymmetryTetragonal
Young`s Modulus /(108g/cm2)7.65
Optical and Spectral Properties
Typical Doping Level15@.%
Refractive Index (@1064nm)no=1.442, ne=1.464
Emission Cross Section (10-20/cm2)1.5@2800nm
Absorption Peak Wavelength972nm
Absorption Bandwidth at Peak Wavelength~1nm
Absorption Coefficient at Peak Wavelength28cm-1
Laser Wavelength2810nm
Lifetime of 4I11/2 ErbiumEnergy Level(ms)4
Thermo-optic Coefficient(10-6 K-1)’-2( //a), -4.1( //c)
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