Er:YAP
Er:YAP具有3μm的大發(fā)射截面，是Er:YAG的三倍大。 高摻雜的Er:YAP可以發(fā)射2.73μm 波長的激光，低摻雜的Er：YAP晶體可以發(fā)射1.66μm 的激光。Er:YAP晶體的發(fā)射光譜和激發(fā)光譜顯示出在人眼安全區(qū)域內(nèi)有較寬的發(fā)射帶，其峰值在1545nm和1608nm附近，并且泵浦帶適用于常見的800nm和970nm二極管激光器，這表明YAP是一種 1.5μm人眼安全范圍內(nèi)的二極管泵浦激光器的候選晶體。與YAG相比，釔鈣鈦礦鋁（YAP）由于具有較高的導(dǎo)熱率（～13.3 W m-1 K-1），良好的機(jī)械性能和較低的光子能量，有望成為有效激光發(fā)射的基質(zhì)材料。 而且，Er:YAP是最有前途的激光材料之一，可以提供高功率的中紅外相干光束。
特點(diǎn)
- 更高的熱導(dǎo)率
- 較低的光子能量
- 良好的機(jī)械性能
- 豐富的能級(jí)結(jié)構(gòu)
- 高摻雜濃度
物理和化學(xué)特性
| 化學(xué)公式 | Er:YAlO3 |
| 晶體結(jié)構(gòu) | 斜方晶體-Pbnm |
| 分子質(zhì)量 | 163.884 |
| 外形 | 半透明結(jié)晶固體 |
| 方向 | b軸-Pbnm |
| 熔點(diǎn) | 1870 °C |
| 密度 | 5.35 g/cm3 |
| 比熱容 | 0.557 J/g·K |
| 導(dǎo)熱系數(shù) | 11.7 W/m·K (a-axis), 10.0 W/m·K (b-axis), 13.3 W/m·K (c-axis) |
| 熱膨脹系數(shù) | 2.32 x 10-6??K-1?(a-axis), 8.08 x 10-6??K-1?(b-axis), 8.7 x 10-6??K-1??(c-axis) |
| 精確質(zhì)量 | 163.872 g/mol |
| 單同位素質(zhì)量 | 163.872 g/mol |
光學(xué)和光譜性質(zhì)
| 激光躍遷 | 4S3/2→4I9/2 | 4I11/2→4I13/2 |
| 激光波長 | 1.66 μm | 2.73 μm |
| 泵浦帶 | 0.6-0.8 μm | 1.53 μm |
| 發(fā)射截面 | 3 μm | |
| 折射率 | 1.94-1.97 (@ 632.8 nm) | |
吸收和發(fā)射光譜
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參考文獻(xiàn)
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