Erbium - CrE5
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 finds wide application 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 CrE5 product is for large energy output application. The glass rod for this product can work safely at 1Hz repetition after surface strengthening treatment at over a 10J output level.
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Laser Specifications
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Cross section for stimulated emission (10^-20 cm^2): 0.8
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Fluorescent lifetime (ms)*: 7.7 - 8.2
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Center lasing wavelength (nm): 1535
Optical Specifications
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Refractive index (1535 nm): 1.533
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Refractive index (d 589.3 nm): 1.541
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Abbe value: 63.6
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dn/dT (10^-6 / ºC) (20 ~ 100 ºC): - 6.8
Thermal Specifications
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Transformation temp. (ºC): 476
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Softening temp. (ºC): 519
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Coeff. of linear thermal expansion (10^-7 / K) (20 ~ 100 ºC): 80.5
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Coeff. of linear thermal expansion (10^-7 / K) (100 ~ 300 ºC): 87
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Thermal coeff. of optical path length (10^-6 / K) (20 ~ 100 ºC): N/A
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Thermal conductivity (25 ºC) (W / m K): 0.80
Other Specifications
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Density (g / cm^3): 2.95
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Chemical durability: N/A
(weigh loss rate at 100ºC distilled water) (μg / hr. cm^2)
* Note: The fluorescent lifetime changes with the erbium concentration.