Erbium - EAT14

Laser output at 1535 nm can be realized with erbium doped phosphate glass. Since this wavelength is safe for the eyes and stays in the communication window, erbium doped phosphate glass can find wide applications in communications, laser range finders, laser medical treatment, laser cosmetics, etc. Erbium laser glass with various doping concentrations can be produced according to a customer’s requirements.

The EAT14 product is a Yb^3+ and Er3+ co-doped phosphate glass that is applicable in high repetition rate (1-6Hz) laser diode pumped 1535 nm lasers. High Yb^3+ doping can be realized with this product as well.

Click the PDF icon below for a free download of the product specifications.

Laser Specifications

Cross section for stimulated emission (10^-20 cm^2): 0.8

Fluorescent lifetime (ms)*: 7.7 - 8.0

Center lasing wavelength (nm): 1535

Optical Specifications

Refractive index (1535 nm): 1.524

Refractive index (d 589.3 nm): 1.532

Abbe value: 66

dn/dT (10^-6 / ºC) (20 ~ 100 ºC): - 1.72

Thermal Specifications

Transformation temp. (ºC): 556

Softening temp. (ºC): 605

Coeff. of linear thermal expansion (10^-7 / K) (20 ~ 100 ºC): 87

Coeff. of linear thermal expansion (10^-7 / K) (100 ~ 300 ºC): 95

Thermal coeff. of optical path length (10^-6 / K) (20 ~ 100 ºC): 2.9

Thermal conductivity (25 ºC) (W / m K): 0.70

Other Specifications

Density (g / cm^3): 3.06

Chemical durability: 52

(weigh loss rate at 100ºC distilled water) (μg / hr. cm^2)

* Note: The fluorescent lifetime changes with the erbium concentration.