Cr:YAG (Chromium-doped Yttrium Aluminum Garnet) Crystal
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
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- Commodity name: Cr:YAG (Chromium-doped Yttrium Aluminum Garnet) Crystal
Cr:YAG (Chromium-doped Yttrium Aluminum Garnet) Crystal, is an outstanding passive Q-switching crystal. It is widely used not only as a high-power passive Q-switch in all-solid-state lasers but also as a gain medium for Infrared Femtosecond Lasers.
Product Introduction
Cr:YAG (Chromium-doped Yttrium Aluminum Garnet) Crystal, is an outstanding passive Q-switching crystal. It is widely used not only as a high-power passive Q-switch in all-solid-state lasers but also as a gain medium for Infrared Femtosecond Lasers.
This crystal is applied in 0.8-1.2 μm diode-pumped or lamp-pumped lasers, such as those utilizing Nd:YAG, Nd:YLF, Nd:YVO₄, and other Nd- or Yb-doped materials.
Cr⁴⁺:YAG crystal is extensively utilized as an excellent passive Q-switch for 1μm neodymium and ytterbium lasers. It is distinguished by high Q-switching efficiency and suitability for high-repetition-rate operation.
With its high laser-induced damage threshold (LIDT) and stable, durable saturable absorber properties, it can, in many cases, replace active electro-optic Q-switches to generate high-power laser pulses. Furthermore, due to its superior chemical stability, durability, UV resistance, good thermal conductivity, high damage threshold (>500 MW/cm²), and ease of handling, Cr⁴⁺:YAG is positioned to supersede traditionally used LiF color centers and organic dyes in the field of passive Q-switching.
Key Advantages
- High thermal conductivity
- High damage tThreshold (>500 MW/cm²)
- Excellent physicochemical properties
- Radiation stability
- Laser chemical performance: stable and reliable, with a long service life.Application Areas
- Material processing
- Holography
- Passive Q-switch for Nd:YAG lasers
- Remote sensing, 3D scanning
- Radar system
- Medical applicationsProduct Features
Material Properties
Chemical Formula
Cr ⁴⁺ Y₃Al₅O₁₂
Crystal Structure
Cubic
Lattice Constant
12.01 Å
Density
4.56 g/cm³
Mohs Hardness
8.5 Mohs
Extinction Ratio
25 db
Doping Concentration
0.5–3 wt%
Emission Wavelength
1350–1600 nm
Orientation
[100] or [110] ≤ ±0.5°
Fluorescence Lifetime
3.4 μs
Thermal Conductivity
0.1213
Refractive Index @ 1064 nm
1.83
Melting Point
1970°C
Product Processing Indicators
Effective Aperture
>90%
Dimensional Tolerance
(W ± 0.05 mm)×(H ± 0.05 mm)×(L ± 0.1 mm)
Chamfer
≤0.2×45°
Surface Quality
20-10 S-D
Flatness
≤λ/8 @632.8 nm
Wavefront Distortion
≤λ/4 @632.8 nm
Parallelism
<30"
Perpendicularity
≤15′
Chipped Edge
<0.1 mm
Coating
Customized to Customer Specifications
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- Narrow wavelength range
- Rare excitation absorption
- Q-switch high constant
- High-absorption section
- Long service life
- Cobalt is evenly distributed -
- Laser technology, optoelectronic devices, materials science
- Passive Q-switch for Er-doped glass lasers at 1.54 μm
- Radar and Ranging
- Medical applications -
Material Properties Chemical formula Co2+: MgAl2O4 Lattice structure Cubic crystal system Lattice parameters 8.07 Å Density 3.62g/cm3 Mohs Hardness 8.2Mohs Extinction Ratio 25db
Co²⁺ doping concentration 0.01–0.3 at% Coefficient of thermal expansion 5.9 × 10⁻⁶/°C at 25°C Lattice Orientation [100] or [111] ≤ ±0.5° Spectral range 1200-1600nm Thermal conductivity 0.033 W/(m·K) at 25°C Refractive index N = 1.6948 @ 1540 nm Melting point 2105°C Product Processing Metrics Effective Aperture >90% Dimensional Tolerance (W ± 0.05 mm) × (H ± 0.05 mm) × (L ± 0.1 mm) Protective Chamfer ≤0.2 × 45° Surface finish 20-10 S-D Flatness ≤λ/8 @ 632.8 nm Wavefront Distortion ≤λ/4 @ 632.8 nm Parallelism <30" Verticality ≤15′ Chipped edge <0.1 mm Coating Customized to customer specifications
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