Nd:KGW Laser Crystal
Nd: KGW crystal is also called neodymium doped potassium tungstate gadolinium crystal. It is a laser crystal material with low laser output threshold and high extraction efficiency, which is very suitable for the application of laser ranging. The absorption peak of Nd: KGW crystal near 808nm is wider than that of Nd: YAG crystal, and its laser extraction efficiency is 3-5 times that of Nd: YAG crystal, and the output laser threshold is very low. Nd: KGW crystal is one of the materials producing laser with low pump energy (0.5-1j).
Specifications of Nd:KGW：

Orientation	[010]
Standard Dopant concentration（at.%）	3%，5%，8%
Maximum length	50mm
Length tolerance，mm	#DIV/0!
Diameter tolerance，mm	+/-0.1
Parallelism	＜30″
Perpendicularity	＜15′
Surface quality	20/10
Coating	AR-coated

Basic Properties：

Crystal structure	monoclinic
Space group	C2h(2/c)-C 2/c
Cell Parameters	a=8.087Å； b=10.374 Å；c=7.588 Å
Cell Parameters	ß=94.41˚
Refractive index, at 1067 nm	ng = 2.049； np = 1.978；nm = 2.014
Mohs hardness	5
Density	7.27g/cm3
Melting Point	1075℃
Thermal conductivity @ 373K,	K[100] = 0.026；K[010] = 0.038；K[001] = 0.034
W x cm-1 x K-1	K[100] = 0.026；K[010] = 0.038；K[001] = 0.034
Young's modulus，GPa	E[100] = 115.8；E[010] = 152.5；E[001] = 92.4
Thermal expansion coefficient, @ 373K	α[100] = 4 x 10-6 K-1; α[010] = 1.6 x 10-6 K-1; α[001] = 8.5 x 10-6 K-1
Lasing Wavelength	911nm，1067nm，1351nm
Absorption band	808nm (FWHM 12nm)
Fluorescent lifetime	110μs (3% doping), 90μs (8% doping)

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