Er3+/Yb3+共掺杂磷酸盐玻璃–作为LD泵浦的1540nm眼睛安全辐射源，可以发射直接在激光测距仪和电信通信中使用的1540nm眼睛安全激光辐射
1540um，Er3+/Yb3+共掺杂磷酸盐玻璃激光器作为一种对人眼安全的波长激光器，由于其紧凑和低成本（例如激光产生和信号放大）而备受关注，因为1540nm的波长正好位于眼睛安全和光纤通信窗口的位置。1540nm激光器已用于测距仪，雷达，目标识别。Er3+/Yb3+共掺杂磷酸盐玻璃与无源被动Q开关钴尖晶石共同获得1540nm脉冲固态激光器。
Er3+发射跃迁发生在与4I13/2→4I15/2相对应的该波长范围内。但是，Er3+吸收本身太弱而不能直接泵浦，因此需要能量转移。最有效的是在2F7/2→2F5/2跃迁吸收下的Yb3+离子，然后是能量转移到 4I11/2 Er3+能级和快速的非辐射跃迁到Er3+ 4I13/2能级，从而发出预期的荧光。Er，Yb：辐射输出为1540 nm的玻璃激光器不需要添加其他组件。
参数
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
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
应用
参考文献
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