Er:glass,NdYAG,NdYVO4,YbYAG,ErYAG

Erbium laser glass

Erbium and ytterbium co-doped phosphate glass has a broad application because of the excellent properties. Mostly, it is the best glass material for 1.54um laser due to its eyesafe wavelength of 1540 nm and high transmission through atmosphere. It's also suitable for medical applications where the need for eye protection may be difficult to manage or diminish or hinder essential visual observation. Recently it is used in optical fiber communication instead of EDFA for its more super plus. There is a great progress in this field.

We can also produce erbium laser glass with various ions doping according to your requirement. We have three kinds of Erbium-doped glasses for different use, WM4, Cr14 and EAT14.

WM4: Erbium phosphate glass for ion-exchange purpose;

Cr14: Erbium phosphate glass for xenon lamp pumping laser device and laser range-finder

EAT14: Yb 3+ , Er 3+ co-doped phosphate glass, which is applicable in high repetition rate (1-6Hz) laser diode pumped 1535nm laser. High Yb 3+ doping can be realized to this EAT14 glass.

PROPERTIES	Cr14	EAT14	WM4
n d	1.5393	1.544	1.536
Density(g/cm 3 )	3.10	3.15	2.83
Center lasing wavelength(nm)		1535
n at lasing wavelength	1.530	1.532
Abbe value	64	65	66
Stimulated cross section (pm 2 )	0.8	0.8	0.75
Fluorescent lifetime (micro second)	7.7	9.0	8.0
Radiative lifetime (micro second)	8.8		9.1
FWHM (nm)	29		45
Transformation temp.(ºC)	455	442	530
Softening temp.(ºC)	493	470	573
a(25-80°C) (10 -7 /K)	103		82
a(25-300°C) (10 -7 /K)	127		96
Knoop hardness (kg/mm 2 )			430
dn/dT (10 -7 /K)	-52	-47	-30
dS/dT (10 -7 /K)	3.6	6.4	14
Coeff.of linear thermal expansion (10 -6 /ºC)（20~100ºC）		10
Non-linear refractive index coeff.n 2 (×10 － 13 e.s.u)		1.20
Weight loss at 100°C boiling water (mg/cm 2 .hr)		70μg/hr.cm 2