Erbium-doped glass (Er Cr Yb Glass) CrE5
Erbium-glass lasers doped with Er³⁺, Yb³⁺ and Cr³⁺ provide useful coherent sources near 1.5μm, a relatively eye-safe spectral region, and are widely used in lidar and ranging, fiber communication and laser surgery. Despite major progress in InGaAs laser-diode pump sources, Xe flashlamps remain useful pumps for erbium-glass lasers because of their high reliability, low cost and simple system design. Approximately half of flashlamp radiation is emitted in the visible and near-infrared (IR), so Cr³⁺ is introduced into Yb-Er laser glass as a second sensitizer to use this energy.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Mass density | 2.95 g/cm³ |
| Mohs hardness | 8.5 |
| Young's modulus | 57.6 GPa |
| Tensile strength | 2 GPa |
| Thermal conductivity | 0.8 |
| Specific heat | 0.59 J·g⁻¹·K⁻¹ |
| Thermal shock resistance parameter | 800 W/m |
| Linear coefficient of thermal expansion [20〜100℃] | 80.5 10⁻⁷ / K |
| Linear coefficient of thermal expansion [100〜300℃] | 87 10⁻⁷ / K |
| Softening temperature | 519 °C |
| Transition temperature | 476 °C |
| Refractive Index [@1535 nm] | 1.533 |
| Refractive Index [d 589.3nm] | 1.541 |
| Abbe value | 63.6 |
| Optical density | 0.1 to 0.8 |
| Fluorescence lifetime [Fluorescence lifetime as a function of erbium concentration] | 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-state absorption cross section [@1535nm] | 0.8×10⁻²⁰ cm²@1535nm |
| Transmission | 10% to 90% |
| Coating [@1535nm] | AR≤ 0.2% @1535nm |
| Damage Threshold | > 500 MW / cm² |
| Orientation tolerance | < 0.5° |
| Thickness / Diameter Tolerance | ±0.05 mm |
| Surface Flatness [@632 nm] | <λ/8@632 nm |
| Wavefront distortion [@632 nm] | <λ/4@632 nm |
| Surface Quality | 10-5(MIL-O-13830A) |
| Parallelism | 10〞 |
| Perpendicularity | 15ˊ |
| Clear Aperture Dimension | >90% |
| Chamfer | <0.1×45° |
| Maximum dimensions | dia (3-12.7)×（3-150）mm² |
Key Features
Datasheet
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