激光晶体（laser crystal），可将外界提供的能量通过光学谐振腔转化为在空间和时间上相干的具有高度平行性和单色性激光的晶体材料。是晶体激光器的工作物质。
物理&光学性质
Ti:Sapphire
Nd:YAG
Nd:YVO₄
晶体结构
Hexagonal
Cubic
Zircon Tetragonal, Space Group D4h
熔点
2050℃
1970℃
密度
3.98 g/cm³
4.56 g/cm³
4.22 g/cm³
莫氏硬度
9
8.5
5
热传导系数
0.11 cal/(℃x secx cm)
14 W/m /K @20℃
||C: 5.23 W/m/K
10.5 W /m /K @100℃
^C: 5.10 W/m/K
热膨胀系数
7.8 x 10⁻⁶ /K [111],0 - 250℃
aa =4.43x10⁻⁶/K
ac =11.37x10⁻⁶/K
激射波长
660~1050nm(795nm0
1064nm
914nm,1064nm,1342nm
吸收范围
400~600nm(488nm)
lamp pump
808nm
晶格常数
a=4.748, c=12.957
12.01
a=b=7.12,c=6.29
荧光寿命
3.2 μsec (T=300K)
230msec
90 msec (about 50ms for 2atm% Nd doped)@808nm
吸收系数
1.0~7.5cm⁻¹@490nm
7.1 cm⁻¹
31.4 cm⁻¹@ 808 nm
折射率
1.76@800nm
1.82 @1064nm
no =1.9573, ne =2.1652@1064nm
极化发射
Unpolarized
Unpolarized
Parallel to Optic Axis (C-axis)
特性:
|
内容 |
0.06-0.5 wt%Ti dopant |
0.5-1.2 atm%Nd dopant(10% tolerance) |
0.2-3 atm%Nd dopant(10% tolerance) |
|
品质因数 |
100-300 |
|
|
|
孔径 |
2-50mm |
3-14mm |
1-20mm |
|
路径长度 |
2-130mm |
1-60mm |
0.02-20mm |
|
结束配置 |
Flat/Flat or Brewster/Brewster Ends or Specified |
||
|
晶体 |
Ti:Sapphire |
Nd:YAG |
Nd:YVO4 |
|
晶向 |
Optical Axis C Normal to Rod Axis |
<111>Crystalline Direction(+/-0.5℃) |
a-cut Crystalline Direction(+/-0.5℃) |
|
平行度 |
<10 arc seconds |
||
|
光洁度 |
Better than 60/40 Scratch/Dig |
Better than 20/10 Scratch/Dig |
Better than 20/10Scratch/Dig |
|
Per MIL-O-13830A |
Per MIL-O-13830A |
Per MIL-O-13830A |
|
|
面形 |
<λ/10@633nm |
<λ/10@632.8nm |
<λ/10@632.8nm |
|
透过波前 |
<λ/4 per inch@633nm |
<λ/10 @632.8nm for 3-7mm |
<λ/8@633nm |
|
<λ/8 per inch@632.8nm for≥7mm |
|||
|
垂直度 |
<5 arc minutes |
<5 arc minutes |
<5 arc minutes |
|
通光口径 |
Central 90% |
Central 95% |
Central 95% |
|
倒角 |
0.15*44° |
0.15*45° |
0.15*45° |
|
损伤阀值 |
Over 15J/cm²(Rods without Coating) over 700MW/cm²(Coating) |
Over 15J/cm²(Rods without Coating) over 700MW/cm²(Coating) |
Over 15J/cm²(Rods without Coating) over 700MW/cm²(Coating) |
|
镀膜 |
AR@700-1100nm |
a)AR@10664nm,R<0.1% |
a)AR@10664nm,R<0.1% |
|
b)AR@1064nm,R<0.1%;HT@808nm,T>95% |
b)AR@1064nm,R<0.1%;HT@808nm,T>95% |
||
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c)HR@1064nm,R<99.8%;HT@808nm,T>95% |
c)HR@1064nm,R<99.8%;HT@808nm,T>95% |
||
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d)HR@1064nm,R<99.8%;HT@808nm,T>95%;HR@532nm,R>99% |
d)HR@1064nm,R<99.8%;HT@808nm,T>95%;HR@532nm,R>99% |
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