Er: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 1.54μm laser due to its eye safe 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 is Erbium Glass doped with Er 3+ and Yb 3+ and suited to applications involving high repetition rates (1 - 6 Hz) and being pumped with 1535 nm laser diodes. This glass is available with high levels of Erbium (up to 1.7%).

Cr14 is Erbium Glass doped with Er 3+, Yb 3+ and Cr 3+ and suited to applications involving xenon lamp pumping. This glass is often used in laser range finder (LRF) applications.

Basic Properties:

Item Units EAT14
Cr14
Transformation Temperature
ºC
556
455
Softening Temperature
ºC
605
493
Coeff. of Linear Thermal Expansion (20~100ºC)
10‾⁷/ºC
87
103
Thermal Conductivity (@ 25ºC)
W/m. ºK
0.7
0.7
Chemical Durability (@100ºC weigh loss rate distilled water)  
ug/hr.cm2 52 103
Density  
g/cm2
3.06 3.1
Laser Wavelength Peak
nm
1535 1535
Cross-section for Stimulated Emission
10‾²º cm²
0.8 0.8
Fluorescent Lifetime
ms
7.7-8.0
7.7-8.0
Refractive Index (nD) @ 589 nm

1.532
1.539
Refractive Index (nD) @ 589 nm

1.524
1.53
dn/dT (20~100ºC)
10‾⁶/ºC
-1.72
-5.2
Thermal Coeff. of Optical Path Length (20~100ºC)
10‾⁷/ºC
29
3.6




Standard Doping

Variants
Er 3+
Yb 3+
Cr 3+
Er:Yb:Cr:Glass
0.16x10^20/cm3
12.3x10^20/cm3
0.129x10^20/cm3
Er:Yb:Cr:Glass
1.27x10^19/cm3
1.48x10^21/cm3
1.22x10^19/cm3
Er:Yb:Cr:Glass
4x10^18/cm3
1.2x10^19/cm3
4x10^18/cm3
Er:Yb:Glass
1.3x10^20/cm3
10x10^20/cm3


Customized available