Erbium-doped glass (Er Yb Glass) EAT14
Our Er,Yb:glass, also known as erbium glass, is a laser glass with good overall performance. Er³⁺ and Yb³⁺ co-doped phosphate glass is a well-known active medium emitting in the eye-safe 1.5–1.6-micrometer region. Lasers at 1540nm lie within the eye-safe and fiber-communication windows, enabling laser generation and signal amplification. Lasers at 1540nm are widely used in rangefinders, radar and target identification. Phosphate glass combines the long lifetime (~8 ms) of the Er³⁺ ⁴I₁₃/₂ upper laser level with the short-lived (2-3 ms) ²F₅/₂ excited state resonant with Yb³⁺. Rapid nonradiative multiphonon relaxation from ⁴I₁₁/₂ to ⁴I₁₃/₂ reduces back energy transfer and upconversion losses arising from interactions between Yb³⁺ and Er³⁺ ions excited at ²F₅/₂ and ⁴I₁₁/₂, respectively. As an LD-pumped eye-safe source at 1540nm, Er³⁺/Yb³⁺ co-doped phosphate glass can emit eye-safe 1540nm radiation directly applicable to laser rangefinders and telecommunications. An Er,Ybglass laser emitting at 1540nm requires no additional components. These compact, low-cost, eye-safe lasers have attracted substantial interest. EAT14 is Yb³⁺/Er³⁺ co-doped phosphate glass for high-repetition-rate (1-6Hz) laser-diode-pumped lasers at 1535nm. High Yb³⁺ doping is achievable in EAT14 glass.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Stimulated-emission cross section | 0.8 10-20cm² |
| Fluorescence lifetime | 7.7-8.0 ms |
| Center laser wavelength | 1535 nm |
| Refractive Index [1535nm] | 1.524 |
| Refractive Index [d 589.3nm] | 1.532 |
| Abbe value | 66 |
| Transition temperature | 556 ℃ |
| Softening temperature | 605 ℃ |
| Linear coefficient of thermal expansion [20〜100℃] | 87 10 ⁻⁷/ K |
| Linear coefficient of thermal expansion [100〜300℃] | 95 10⁻⁷ / K |
| Thermal coefficient of optical path length [20〜100℃] | 2.9 10⁻⁶/ K |
| Thermal conductivity [25℃] | 0.7 W / mK |
| Density | 3.06 g / cm³ |
| Chemical durability [Weight-loss rate in distilled water at 100℃] | 52 μg/ hr.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 |
| Parallelism | 10〞 |
| Perpendicularity | 15ˊ |
| Clear Aperture Dimension | >90% |
| Chamfer | <0.1×45° |
| Maximum dimensions | dia (3-12.7)×（3-150）mm² |
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Datasheet
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