Er:Glass

Description:

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.

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.

Cr14: Yb 3+, Cr: 3+, Er 3+YbErbium phosphate glass for xenon lamp pumping laser device and laser range-finder.

Properties:

PROPERTIES	Cr14	EAT14
LASER PROPERTIES
Cross section for stimulated emission (10 -20 cm²)	0.8	0.8
Fluorescent lifetime (ms)	7.7-8.0	7.7-8.0
Center lasing wavelength (nm)	1535	1535
OPTICAL PROPERTIES
n (1535nm)	1.53	1.524
nd	1.539	1.532
Abbe value	64	66
dn/dT (10 -6 /ºC) (20~100ºC)	-5.2	-1.72
Coeff. of linear thermal expansion (10 -7 /ºC)(20~100ºC)	103	87
Thermal coeff. of optical path length (10 -7 /ºC) (20~100ºC)	3.6	29
THERMAL PROPERTIES
Transformation temp. (ºC)	455	556
Softening temp. (℃)	493	605
Thermal conductivity (25℃) (W/m. K)	0.7	0.7
Coeff. of linear thermal expansion (10 -7 /℃) (100~300℃)	127	95
OTHER PROPERTIES
Density (g/cm³ )	3.1	3.06
Chemical durability (weigh loss rate at 100ºC distilled water) (μg/hr.cm² )	103	52

Standard Doping

CR14:

(0.13%:Er:Yb:Cr:Glass) Er3+ 1.3x10^19/cm³, Yb3+ 2x10^21/cm³, Cr4+ 1.2x10^21/cm3: Glass

EAT14:

(0.13%:Er:Yb:Glass) Er3+ 1.3x10^19/cm³, Yb3+ 2x10^21/cm³: Glass

(0.26%:Er:Yb:Glass) Er3+ 2.6x10^19/cm³, Yb3+ 2x10^21/cm³: Glass

(0.5%:Er:Yb:Glass) Er3+ 5x10^19/cm³, Yb3+ 2x10^21/cm³: Glass

(1%:Er:Yb:Glass) Er3+ 10x10^19/cm³, Yb3+ 2x10^21/cm³: Glass

Er:Glass

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