Tm:YAG
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Tm：YAG在0.82μm波長(zhǎng)范圍內(nèi)的3H4–3H6躍遷上運(yùn)行。它可以用波長(zhǎng)范圍為0.78 – 0.8μm的高效二極管激光器泵浦。該過渡具有小的量子缺陷，可實(shí)現(xiàn)低散熱。為了獲得良好的能量存儲(chǔ)，激發(fā)態(tài)壽命可以很長(zhǎng)，大約為毫秒。它還具有足夠的增益帶寬，可根據(jù)主體材料和工作溫度來(lái)支持亞ps長(zhǎng)的脈沖。與單晶材料相比，透明陶瓷材料結(jié)合了單晶和玻璃的優(yōu)點(diǎn)。通過固態(tài)反應(yīng)和真空燒結(jié)來(lái)制造透明陶瓷材料。因此，它們不僅具有與單晶一樣優(yōu)良的光學(xué)和熱性能，而且還具有大尺寸、高濃度的特點(diǎn)。此外，它們還具有其他優(yōu)勢(shì)，例如制造周期短，成本較低和多功能樣品。
材料規(guī)格
| Tm濃度公差（atm％） | Tm:0.5~5at% |
| 取向 | [111]，<5o |
| 平行性 | ≤10″ |
| 垂直性 | ≤5′ |
| 表面質(zhì)量 | 10-5?(MIL-O-13830A) |
| 波前失真 | ≤?0.125λ/25?mm?@632.8nm |
| 表面平整度 | λ/8@632nm |
| 通光孔徑 | >95% |
| 倒角 | ?0.15±0.05mm |
| 尺寸 | D: 2~10mm，L: 3~150mm |
| 涂層 | AR: ≤0.25%?@2μm |
物理和化學(xué)特性
| 激光躍遷 | 3F4→3H6 |
| 激光波長(zhǎng) | 1.87~2.16μm |
| 折射率的溫度依賴性 | 7.3 10-6/K |
| 吸收截面 | 7.5×10-21cm2 |
| 二極管泵浦帶 | 785nm,?680nm |
| 發(fā)射截面@ 2013nm | 2.9×10-20?cm2 |
| 熒光壽命 | ?11ms |
| 折射率@ 632nm | 1.83 |
光學(xué)和光譜性質(zhì)
| 激光躍遷 | 3F4→3H6 |
| 激光波長(zhǎng) | 1.87~2.16μm |
| 折射率的溫度依賴性 | 7.3 10-6/K |
| 吸收截面 | 7.5×10-21cm2 |
| 二極管泵浦帶 | 785nm,?680nm |
| 發(fā)射截面@ 2013nm | 2.9×10-20?cm2 |
| 熒光壽命 | ?11ms |
| 折射率@ 632nm | 1.83 |
參考文獻(xiàn)
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| [27] Chunting Wu?,? Jiang Y ,? Wang C , et al. Pulse-diode-intermittent-pumped 2-μm acousto-optically Q-switched Tm:YAG laser[J]. Infrared Physics & Technology, 2019, 96:151-154. |
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