Nd:YVO4
我司的Nd:YVO4晶體產品，又稱摻釹釩酸釔晶體。是一種綜合性能出色的制作半導體泵浦固體激光器的激光晶體產品。Nd:YVO4晶體廣泛用于在機械、材料加工、波譜學、晶片檢驗、顯示器、醫學檢測、激光印刷、數據存儲等多個領域。該產品有熱導性能好，受激發射截面大，激光損傷閾值高、吸收帶寬，吸收峰約808nm等特點。由于這些優點，小晶體可以用來制造更小的激光器件。Nd:YVO4晶體的另一個特點是它是單軸的，這使得它發出線性偏振光。與倍頻晶體相結合，可以實現綠、藍、紅三種波長的全固態激光器。現在Nd:YVO4激光器已在機械、材料加工、波譜學、晶片檢驗、顯示器、醫學檢測、激光印刷、數據存儲等多個領域得到廣泛的應用。而且Nd:YVO4二極管泵浦固態激光器正在迅速取代傳統的水冷離子激光器和燈泵浦激光器的市場，尤其是在小型化和單縱模輸出方面。可以運用在激光二極管泵浦全固態(DPSS)微小型激光器，激光雷達，遙感衛星產品之中。
特點
- 吸收系數高
- 受激發射截面大
- 吸收帶寬
- 損傷閾值高
- 單軸晶體
- 良好的物理和光學性能
材料規格
| 材料 | Nd: YVO4 |
| 濃度公差（atm％） | 0.5%, 1.1%, 2.0%, 3.0% |
| 取向 | A-cut or C-cut |
| 平行性 | 20〞 |
| 垂直性 | 5〞 |
| 表面質量 | 符合MIL-O-13830 B的10/5劃痕/凹陷 |
| 波前畸變 | <λ/8 @633nm |
| 表面平整度 | λ/10@ 633 nm |
| 通光孔徑 | >90% |
| 倒角 | ≤0.2mm@450 |
| 尺寸公差 | (W±0.1mm)x(H±0.1mm)x(L+0.2/-0.1mm) (L<2.5mm) |
| (W±0.1mm)x(H±0.1mm)x(L+0.5/-0.1mm) (L≥2.5mm) | |
| 角度公差 | ≤0.5° |
| 損傷閾值[GW / cm2] | >1 for 1064nm, TEM00, 10ns, 10Hz (AR-涂層) |
| 涂層 | HR@1064nm+532nm+HT@808nm/AR@1064nm+532nm |
物理和化學特性
| 晶體結構 | 鋯石四方體，空間群D4h-I4 / amd |
| 晶格常數 | a=b=7.12, c=6.29 |
| 密度 | 4.22g/cm3 |
| 熔點 | 1825 |
| 導熱系數/（W·m-1·K-1 @ 25°C） | 5.2 |
| 熱光學系數（dn / dT） | dno/dT=8.5×10-6/K; dne/dT=2.9×10-6/K |
| 熱膨脹率/（10-6·K-1 @ 25°C） | a = 4.43, c= 11.4 |
| 硬度（莫氏） | 4~5 |
光學和光譜性質
| 激光波長 | 1064nm, 1342nm |
| 偏振激光發射 | π偏振；平行于光軸（c軸） |
| 泵浦波長 | 808nm |
| 本征損失 | 0.02cm-1?@1064nm |
| 二極管泵浦光到光效率 | >60% |
| 發射截面 | 25×10-19cm2@1064nm |
| 熒光壽命 | 90 μs (大約 50 μs for 2 atm% Nd 摻雜) @ 808 nm |
| 增益帶寬 | 0.96nm @1064nm |
| 折光率 | 1.9573(no); 2.1652(ne) @1064nm |
| 1.9721(no); 2.1858(ne) @808nm | |
| 2.0210(no); 2.2560(ne) @532nm | |
| 吸收系數 | 31.4 cm-1?@ 808 nm |
| 吸收長度 | 0.32 mm @ 808 nm |
| 增益帶寬 | 0.96 nm (257 GHz) @ 1064 nm |
吸收和發射光譜
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參考文獻
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