Fused Silica Optics Co.,LTD
Fused Silica Optics Co.,Ltd
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ND YVO4 Laser Crystal
Neodymium doped yttrium vanadate (Nd:YVO4) is one of the most promising commercially available diode pumped solid state laser materials. It has high laser induced damage threshold and good mechanical in addition to optical properties. Its large stimulated emission cross-section and high absorption of pump laser make it a right crystal for pocket baby laser. Because of its high pump quantum efficiency, the slope efficiency of Nd:YVO4 can be very high if the laser cavity is properly designed.Fused Silica Optics supplies Nd, Yb and no doped YVO4 crystal.
Specification
| Dopant Concentration Tolerance | 0.10% |
| Parallelism | <10 arc seconds |
| Perpendicularity | <5 arc minutes |
| Chamfer | 0.1mm @45° |
| Clear Aperture | 95% |
| Surface Quality | 10/5 |
| Surface Flatness | λ/10 @ 633nm |
| Wavefront Distortion |
<7mm diameter: λ/10@633nm ≥7mm diameter: λ/8@633nm |
| Damage Threshhold | over 15J/CM2 TEM00, 10NS, 10HZ |
Physical and Optical Properties
| Atomic Density (Nd 1.0%) | ~1.37x1020 atomics/cm3 |
| Crystal Structure | Zircon Tetragonal, space group D4h- 14/amd, a=b=7.12A; C=6.29A |
| Density | 4.22 g/cm3 |
| Mohs Hardness | Glass-like,~5 |
| Thermal Expansion Coefficient | a α=4.43*10-6/K,a c=11.37x10-6/K |
| Thermal Conductivity Coefficient | || c:5.23 W/m/K;丄C:5.10 W/m/K |
| Lasing Wavelengths | 914nm,1064nm,1342nm |
| Crystal Class | positive uniaxial, n°=na=nb,ne=nc n°=1.9573, ne=2.1652, @ 1064nm n°=1.9721, ne=2.1858, @ 808nm n°=2.0210, ne=2.2560, @ 532nm |
| Thermal Optional Coefficient | dn°/dT =8.5x10-6/K,dne/dT=3.0x10-6/K |
| Stimulated Emission Cross-Section | 25.0x10-19cm2,@ 1064nm |
| Fluorescent Lifetime | 90μs @ 808nm |
| Absorption Coefficient | 31.4 cm-1 @ 808nm |
| Absorption Length | 0.32mm @ 808nm |
| Intrinsic Loss | Less 0.1% cm-1 ,@1064nm |
| Gain Bandwidth | 0.96 nm(257 GHz)@ 1064nm |
| Polarized Laser Emission | parallel to optics axis(c-axis) |
| >Diode Pumped Optical to Optical Efficiency π polarization | >60% |
| Sellmeier Equation( For pure YVO4 crystals) | n°2=3.77834+0.069736/(λ2 – 0.04724) – 0.0108133λ2 n°2=4.59905+0.110534/(λ2 – 0.04813) – 0.0122676 λ2 |