Cr4+:YAG Crystals

Cr4+:YAG Crystals

Initial transmission:
5%~97%@1064nm

Orientation:
<100>± 5° or <110>± 5°

Flatness:
<λ/8

Coating Reflectivity:
AR/AR@1064nm R<0.25%

Surface quality:
20~10(after coating)

Barrel finishing:
Ground finish 400# Grit

Dimension:
Rod: Ø2.0~Ø25mm
Slab: H x W 3*3-20*20mm
Or customized

Cr4+:YAG Crystals Overview

Cr4+:YAG(Chromium-doped Yttrium Aluminum Garnet ) is a passive Q-switch crystal which is widely used on Nd:YAG,  Nd:Ce:YAG,  Nd: YLF,  Nd:YVO4, Yb:YAG lasers at wavelength of 800nm~1200nm. The Passive Q-switches or saturable absorbers can provide high power laser pulses without EO Q-switches

Advantages:
  • High damage threshold
  • More robust and stable than dyes or color centers

wdt_ID Attributes Values
1 Orientation <100>± 5° or <110>± 5°
2 Initial transmission 5%~97%@1064nm
3 Dimension Rod: Ø2.0~Ø25mm
Slab: H x W 3*3-20*20mm
Or customized
5 Parallelism ≤20"
6 Perpendicularity ≤15’
7 Flatness <λ/8
8 Surface quality 20~10 (after coating)
9 Barrel finishing Ground finish 400# Grit
10 Coating Reflectivity AR/AR@1064nm R<0.25%
11 Damage threshold ≥5J/cm² 10ns 10Hz 1064nm
wdt_ID Attributes Value
24 Crystal Structure Cubic
25 Density 4.56g/cm³
26 Melting Point 1970°C
27 Mohs Hardness 8.5
28 Youngs Modulus 3.17x10⁴Kg/mm²
29 Specific Heat (0-20) 0.59J/g.cm³
30 Lattice Parameters 12.01Å
31 Modulus of Elasticity 310Gpa
32 Poisson Ratio 0.3
33 Tensile Strength 0.13~0.26GPa
wdt_ID Attributes Value
24 Chemical Formula Cr⁴⁺:Y₃Al₅O₁₂
34 Thermal Expansion Coefficient <100> 8.2x10⁻⁶/K (0 °C~250 °C)
<110> 7.7x10⁻⁶/K (0 °C~250 °C)
<1111> 7.8x10⁻⁶/K (0 °C~250 °C)
45 Thermal optical Coefficient 7.3x10⁻⁶/K
46 Thermal Conductivity 14 W/m/K@20°C
10.5 W/m/K@100°C
48 Thermal Shock Resistance 790W/m
49 Solubility Water: Insoluble
Common Acids: Slightly