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(yī)學檢測、激光印刷、數(shù)據(jù)存儲等多個領域。該產品有熱導性能好，受激發(fā)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(yōu)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(fā)出線性偏振光。與倍頻晶體相結合，可以實現(xiàn)綠、藍、紅三種波長的全固態(tài)激光器。現(xiàn)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(yī)學檢測、激光印刷、數(shù)據(jù)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(tài)激光器正在迅速取代傳統(tǒng)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(tài)(DPSS)微小型激光器，激光雷達，遙感衛(wèi)星產品之中。
特點
- 吸收系數(shù)高
- 受激發(fā)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(guī)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(shù) | a=b=7.12, c=6.29 |
| 密度 | 4.22g/cm3 |
| 熔點 | 1825 |
| 導熱系數(shù)/（W·m-1·K-1 @ 25°C） | 5.2 |
| 熱光學系數(shù)（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(fā)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(fā)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(shù) | 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(fā)射光譜
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參考文獻
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