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, EAT14, Cr14 .

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 of Erbium Laser Glass

Cross section for stimulated emission (10 -20 cm 2 ) 0.8 0.8
Fluorescent lifetime (ms) 7.7-8.0 7.7-8.0
Center lasing wavelength (nm) 1535 1535
n ( 1535nm ) 1.530 1.524
n d 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
Transformation temp. (ºC) 455 556
Softening temp. (ºC) 493 605
Thermal conductivity (25ºC) (W/m. K) 0.70 0.70
Coeff. of linear thermal expansion (10 -7 /ºC) (100~300ºC) 127 95
Density (g/cm 3 ) 3.10 3.06
Chemical durability (weigh loss rate at 100ºC distilled water) (μg/ 2 ) 103 52

The fluorescent lifetime will have some change according to the erbium concentrations.
Standard Doping


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


(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