Erbium and Ytterbium co-doped phosphate laser glass rods
Erbium and Ytterbium co-doped phosphate glass is one of the best suited materials for lasing at 1.54µm, a wavelength which is well suited to ‘eye safe’ applications.

Advatech offers two types of Erbium doped phosphate glass, EAT14 and CR14
Request Quote
Er:Glass Laser - EAT14
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%).
Er:Glass - CR14
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.
Er:Glass Laser Properties
Laser / Optical Properties Units EAT14 CR14
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
Radiative Lifetime
Fluorescence Linewidth (FWHM) nm
Fluorescence Linewidth (Effective) nm
Loss @ Lasing Wavelength %cm-1
Refractive Index (nD) @ 589 nm 1.532 1.539
Refractive Index (n) @ 1535 nm 1.524 1.53
Nonlinear Index N2 1.532 1.539
Abbe Value 66 64
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
Physical / Thermal Properties 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
Specific Heat J/g K
Chemical Durability (@100ºC weigh loss rate distilled water) μg/hr.cm² 52 103
Density g/cm³ 3.06 3.1
Durability Knoop Hardness kgf/mm²
Young's Modulus 10^3 N/mm2
Poisson's Ratio
Damage Threshold (1ns) J/cm3
Erbium Laser Glass - EAT14 Standard Dopings
Variants Er 3+ Yb 3+
0.13%:Er:Yb:Glass 1.3x10^19/cm3 2.1x10^21/cm3
0.26%:Er:Yb:Glass 2.6x10^19/cm3 2.1x10^21/cm3
0.50%:Er:Yb:Glass 5x10^19/cm3 2.1x10^21/cm3
1.00%:Er:Yb:Glass 10x10^19/cm3 2.1x10^21/cm3
1.18%:Er:Yb:Glass 11.8x10^19/cm3 2.1x10^21/cm3
1.26%:Er:Yb:Glass 12.6x10^19/cm3 2.1x10^21/cm3
1.70%:Er:Yb:Glass 17x10^19/cm3 2.1x10^21/cm3
Erbium Laser Glass - CR14 Standard Dopings
Variants Er 3+ Yb 3+ Cr 3+
0.13%:Er:Yb:Cr:Glass 1.3x10^19/cm3 2.0x10^21/cm3 0.5x10^19/cm3
0.13%:Er:Yb:Cr:Glass 1.3x10^19/cm3 2.0x10^21/cm3 0.2x10^21/cm3
Erbium Laser Glass - Ordering
Size/Doping: Standard parts can be ordered using the following Part No.: LR:ER:GLAS/WxHxL/D/F/C
W & H: Block Width & Height (mm)
L: Block Length (mm)
D: Doping (%)
F: Finish (P=Plane, W=Wedge, B=Brewster)
C: Coating Requirements