铒玻璃 (Er Yb Glass)
我司的Er,Yb:glass玻璃产品，又称铒玻璃，是一种综合性能良好的激光玻璃。Er3+ , Yb3+共掺杂磷酸盐玻璃（Er, Yb:磷酸盐玻璃）是一种众所周知且常用的活性介质，它发射的激光在1.5 – 1.6微米的“人眼安全”光谱范围内。1540nm激光器正处于人眼安全和光纤通信窗口的位置。这就导致了激光的产生和信号的放大。1540nm激光器已广泛应用于测距仪，雷达，目标识别等领域。磷酸盐玻璃结合了4I13/2Er3+上激光能级 的长寿命（~8 ms）激光能级和与Yb3+共振的低寿命（2-3 ms） 2F5/2激发态。从4I11/2到4I13/2的快速非辐射多声子弛豫由于分别在2F5/2 和4I11/2 能级激发的Yb3+和Er3+离子之间的相互作用，能级大大降低了反向能量转移和上转换损失。Er3+/Yb3+共掺磷酸盐玻璃作为LD泵浦的1540nm人眼安全辐射源，可发射直接用于激光测距仪和电信通信的人眼安全1540nm激光辐射。具有1540nm波长的辐射输出的Er,Ybglass激光器不需要添加额外的组分。Er3+/Yb3+共掺磷酸盐玻璃激光器是一种人眼安全波长激光器。由于其体积小、成本低而备受关注。EAT14：Yb3+，Er3+共掺磷酸盐玻璃，适用于高重复频率（1-6Hz）激光二极管泵浦1535nm激光器。在这种EAT14玻璃中可以实现高Yb3+掺杂。
特点
- 吸收带宽
- 荧光寿命长
- 光学质量高
- 眼睛安全
- 斜率效率高
激光规格
| EAT14 | WM4 | |
| 受激发射的横截面（10-20cm2） | 0.8 | 0.75 |
| 荧光寿命（毫秒）* | 7.7-8.0 | 7.7-8.2 |
| 中心激光波长（nm） | 1535 | 1535 |
光学性质
| EAT14 | WM4 | |
| 折射率（1535nm） | 1.524 | 1.528 |
| 折射率（d 589.3nm） | 1.532 | 1.536 |
| 阿贝值 | 66 | 66 |
| dn / dT（10-6 /℃）（20〜100℃） | -1.72 | -3 |
热规范
| EAT14 | WM4 | |
| 转变温度 （℃） | 556 | 530 |
| 软化温度 （℃） | 605 | 573 |
| 线性热膨胀系数（10 -7/ K）（20〜100℃） | 87 | 82 |
| 线性热膨胀系数（10-7 / K）（100〜300℃） | 95 | 96 |
| 光程长度的热系数（10-6/ K）（20〜100℃） | 2.9 | 1.4 |
| 导热系数（25℃）（W / mK） | 0.7 | 0.7 |
其他规格
| EAT14 | WM4 | |
| 密度g / cm3 | 3.06 | 2.83 |
| 化学耐久性（在100℃蒸馏水中的失重率）（μg/ hr.cm2） | 52 | 82 |
吸收和发射光谱
 |  |
| EAT-14发射曲线 | EAT-14吸收曲线 |
 |  |
抛光规格
| 方向公差 | < 0.5° |
| 厚度/直径公差 | ±0.05 mm |
| 表面平整度 | <λ/8@632 nm |
| 波前失真 | <λ/4@632 nm |
| 表面质量 | 5-Oct |
| 平行性 | 10〞 |
| 垂直性 | 15ˊ |
| 通光孔径 | >90% |
| 倒角 | <0.1×45° |
| 最大尺寸 | dia (3-12.7)×（3-150）mm2 |
参考文献
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