Erbium Glass doped with Er3+, Yb3+ and Cr3+, Erbium-doped glass laser provides a useful coherent source in the spectral range near 1.5 μm, which is relatively safe for the human eye and is convenient in many applications, such as lidar and range measurements, fiber-optic communication, and laser surgery. In spite of the considerable progress in the development of InGaAs laser diode pump sources, Xe
flashlamp will continue to be used as pump sources of Er: glass lasers because of their high reliability and low cost, and also the simplicity of design of such systems. Since about half the flashlamp radiation energy is emitted in the visible and near infrared (IR) ranges, a second sensitizer Cr3+ is introduced into Yb-Er laser glasses to utilize this energy.
Laser Glass Erbium Glass (Er,Cr,Yb Glass)
APPLICATION
-
Lidar
- Range measurements
- Fiber-optic communication
- Laser surgery
KEY FEATURES
-
High laser efficiency
/ - Low laser threshold/
- Safe for human eye/
- High light conversion/
PRODUCT PARAMETERS
| Material Specifications | ||
| Materials | Cr14 | CrE5 |
| Mass Density | 3.10 g/cm3 | 2.95 g/cm3 |
| Mohs Hardness | 8.5 | 8.5 |
| Young’s Modulus | 57.6 GPa | 57.6 GPa |
| Strength of Extension | 2 GPa | 2 GPa |
| Thermal Conductivity | 0.7 | 0.8 |
| Specific Heat Capacity/（J·g-1·K-1） | 0.59 | 0.59 |
| Thermal Shock Resistance Parameters | 800 W/m | 800 W/m |
| Thermal Coefficient Optical path length（10-7 /ºC）（20~100ºC） | 3.6 | – |
| Linear Thermal Expansion Coefficient（10-7 / K）（20~100℃） | 103 | 80.5 |
| Linear Thermal Expansion Coefficient（10-7 / K）（100~300℃） | 127 | 87 |
| Softening Temperature（℃） | 493 | 519 |
| Transformation Temperature（℃） | 455 | 476 |
| Chemical Durability (weight loss in 100 C distilled water)（μg/ hr.cm2） | 103 | – |
| dn / dT（10-6 /ºC）（20~100ºC） | -5.2 | -6.8 |
| Refractive Index @ 1535 nm | 1.53 | 1.533 |
| Refractive Index @ 589.3nm | 1.539 | 1.541 |
| Abbe Value | 64 | 63.6 |
| Optical Properties | |
| Optical Density | 0.1 to 0.8 |
| Fluorescent Lifetime | 7.7-8.2 ms |
| Concentration | 0.5 mol % ~ 3 mol % |
| Emission Wavelength | 1535 nm |
| Absorption Coefficient | 1.0 cm-1 ~ 7 cm-1 |
| Emission Absorption Cross Section | 0.75×10-20cm2@1535nm |
| Transmittance | 10% to 90% |
| Coating | AR≤ 0.2% @1535nm |
| Damage Threshold | > 500 MW / cm2 |
| Polishing Specifications | |
| Orientation Tolerance | < 0.5° |
| Thickness/Diameter Tolerance | ±0.05 mm |
| Flatness | <λ/8@632 nm |
| Wavefront Distortion | <λ/4@632 nm |
| Surface Finish | 10-5 |
| Parallelism | 10〞 |
| Perpendicularity | 15ˊ |
| Clear Aperture | >90% |
| Chamfer | <0.1×45° |
| Max. Size | dia (3-12.7)×（3-150）mm2 |
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