产品分类

Ho:YAG

Product Description

Ho ion is used as active ion, the pump wavelength is 1.9 μm, and the output wavelength is 2.05 μm unpolarized laser. Due to the excellent physical and chemical properties of the YAG matrix, it can withstand high thermal loads, so it can output 2.05 μm lasers with high power and high repetition frequency. It is an important pump source laser crystal for mid-wave infrared lasers

Main Features

Unpolarized laser output

high thermal conductivity

Strong thermal shock resistance

Suitable for 1.9μm laser pumping

Material Properties

Crystal structure	Cubic system
Lattice constant	12.01 Å
Melting point	1970°C
Moh's hardness	8.5
Density	4.56±0.04g/ cm3
Specific heat	0.59J/g.cm 3 @0-20℃
Elastic Modulus	310GPa
Young's modulus	3.17×10 4 Kg/mm2
Poisson's ratio	0.3
Tensile strength	0.13~0.26GPa
Coefficient of thermal expansion	[100] Direction: 8.2×10 -6 /K@ 0~250℃
	[110] Direction: 7.7×10 -6 /K@0~250℃
	[111] Direction: 7.8×10 -6 /K@0~250℃
Thermal conductivity	14W/m/K@20℃
Thermal conductivity	10.5W/m/K@100℃
Thermo-optic coefficient (dn/dT)	dn/dT =7.3×10 -6 /K
Thermal shock resistance	790W/m
Solubility	Insoluble in water, slightly soluble in common acids

Product Parameters

Doping concentration	0~3at% Can be customized according to customer requirements
Orientation	<111>±5°
Wavefront distortion	≤0.25λ/25mm @632.8nm
Size	Diameter: 3~15mm, Length: 5~180mm , can be customized
Dimensional tolerance	Diameter: +0.00/-0.05mm, Length: ± 0.5mm
Cylindrical processing	Grinding or Polishing
Parallelism of end faces	≤10"
Perpendicularity between end face and rod axis	≤5′
Flatness of end face	≤λ/10@632.8nm
Surface Quality	10-5 (MIL-O-13830A)
Chamfer	0.15±0.05mm
AR Coating Reflectance	≤0.25%