|
| (掺钕钒酸钇晶体) |
| 基本性能： |
|
| 〉 原子密度: |
~1.37 × 1020 atoms/cm2 |
| 〉 晶体结构 |
Zircon Tetragonal,space
group D4h
,a=b=7.12,c=6.29 |
| 〉 密度 |
4.22g/cm3 |
| 〉 莫氏硬度 |
Glass-like,~5 |
| 〉 热涨系数 |
ａa=4.43×10-6/K ａc=11.37×10-6/K |
| 〉 导热率 |
∥C:5.23W/m/k; ⊥C:5.10W/m/K; |
光学性能： |
| 激光波长 |
914nm,1064nm,1342nm |
| |
正极非轴向,no=na=nb,ne=nc |
| 晶体等级 |
no=1.9573, ne=2.1652,@1064nm |
| |
no=2.0210, ne=2.2560,@532nm |
| |
no2=3.77834+0.069736/(λ2-0.04724)-0.0108133•λ2 |
| Sellmeier equation(for pure YVO4 crystals): |
| |
no2=3.77834+0.069736/(λ2-0.04724)-0.0108133•λ2 |
| |
ne2=4.59905+0.110534/(λ2-0.04813)-0.0122676•λ2 |
| 热光学系数: |
dna/dT=8.5×10-6/K dnc/dT=3.0×10-6/K |
| 受激发射纵截面 |
25.0×1019cm2,@1064nm |
| 荧光寿命 |
90µs,(about
50µsfor 2 atm% Nd doped) @808n |
| 吸收系数 |
31.4cm-1@808nm |
| 吸收长度 |
0.32mm@808nm |
| 内在损耗 |
less
0.1%cm-1@1064nm |
| 增益带宽 |
0.96nm(257GHz) @1064nm |
| 极化激光发射 |
π polarization;parallel to optic axis (c-axis) |
二极管光学泵吸收率＞60﹪ |
Absorption Curves of Different Doping Nd:YVO
4
Nd:YVO 4 shows high absorption coefficient at pumping wavelengths.Thereford,a
crystal Short-in-length(e.g.1mm)is preferred,and more compact
lasers can be constructed by Using Nd:YVO4
than using Nd:YAG.Furthermore,it has a wide and smoothly-varied
bandwidth Of absorption,so that it allows of less stringent
requirements of diode laser selection And wavelength control
as compared with Nd:YAG.Different doping levels Nd:YVO4
are shown showed as beside: |
|
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