Cr:YAG

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Cr⁴⁺:YAG crystal, with its full name being chromium-doped yttrium aluminum garnet, is an ideal material for Q-switching in lasers with wavelengths ranging from 0.8 to 1.2μm (such as Nd:YAG and other Nd or Yb-doped ones). It is also an active medium that can be used in CW (continuous wave), pulsed or self-mode-locked tunable near-infrared (NIR) solid-state lasers. Moreover, it serves as a medium for Q-switching in lasers with a tunable range of 1340–1580nm and those with an operating wavelength of 950 - 1100nm. One of the remarkable features of Cr⁴⁺:YAG is its high damage threshold (ranging from 500 to 1000 MW/cm²). Its absorption band stretches from 800 nm to

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Product Features & Applications Physical & Optical Properties Product Specifications Standard Products

Product Applications:

Passive Q-switched laser

Short-pulse laser system

Laser ranging

Product Features：

High efficiency
High damage threshold
Operation at room temperature
The laser working wavelength is relatively safe for human eyes
Good thermal conductivity and thermal shock resistance

Chemical Formula	Cr4+:Y3Al5O12
Crystal Structure	cubic crystal system
Lattice Parameter Å	12.01
Crystal Orientation	[100] or [110] < ±0.5°
Density	4.56 g/cm3
Mohs Hardness	8.5
Young's Modulus	335 GPa
Tensile Strength	2 GPa
Melting Point	1970°C
Thermal Conductivity Coefficient	0.1213
Specific Heat/（J·g-1·K-1）	0.59
Thermal Expansion/（10-6 /°C @ 25°C）	7.8 <111>
	7.7 <110>
	8.2 <100>
Thermal Conductivity	14W/m/K@20℃
Thermal Conductivity	10.5W/m/K@100℃
Thermo-Optic Coefficient	dn/dT =7.3×10-6/K
Thermal Shock Resistance	790W/m
Solubility	Insoluble in water, slightly soluble in common acid
Optical Density	0.1 to 0.8
Fluorescence Lifetime	3.4μs
Concentration	0.5 mol % ~ 3 mol %
Emission Wavelength	1350 nm ~ 1600 nm
Absorption Coefficient	1.0 cm-1 ～ 7 cm-1
Ground State Absorption Cross Section	4.3×10-18 cm2
Excited State Absorption Cross Section	8.2×10-19 cm2

Orientation Tolerance	< 0.5°
Thickness/Diameter Tolerance	±0.05 mm
Surface Flatness	<λ/8@632 nm
Wavefront Distortion	<λ/4@632 nm
Surface Quality	10/5-Oct
Parallel	10〞
Perpendicular	5ˊ
Circular Aperture	>90%
Chamfer	<0.1×45°
HR Coating	≤ 0.2% (@ 1340nm)
Maximum Dimension	22-1515 mm×20mm

4、标准产品 Standard Products

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Cr ：YAG

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