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激光晶體（laser crystal），可將外界提供的能量通過光學諧振腔轉化為在空間和時間上相干的具有高度平行性和單色性激光的晶體材料。是晶體激光器的工作物質。
物理&光學性質
Ti:Sapphire
Nd:YAG
Nd:YVO?
晶體結構
Hexagonal
Cubic
Zircon Tetragonal, Space Group D4h
熔點
2050℃
1970℃
密度
3.98 g/cm3
4.56 g/cm3
4.22 g/cm3
莫氏硬度
9
8.5
5
熱傳導系數
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
熱膨脹系數
7.8 x 10?? /K [111],0 - 250℃
aa =4.43x10??/K
ac =11.37x10??/K
激射波長
660~1050nm(795nm0
1064nm
914nm,1064nm,1342nm
吸收范圍
400~600nm(488nm)
lamp pump
808nm
晶格常數
a=4.748, c=12.957
12.01
a=b=7.12,c=6.29
熒光壽命
3.2 μsec (T=300K)
230msec
90 msec (about 50ms for 2atm% Nd doped)@808nm
吸收系數
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
極化發射
Unpolarized
Unpolarized
Parallel to Optic Axis (C-axis)
特性:
|
內容 |
0.06-0.5 wt%Ti dopant |
0.5-1.2 atm%Nd dopant(10% tolerance) |
0.2-3 atm%Nd dopant(10% tolerance) |
|
品質因數 |
100-300 |
|
|
|
孔徑 |
2-50mm |
3-14mm |
1-20mm |
|
路徑長度 |
2-130mm |
1-60mm |
0.02-20mm |
|
結束配置 |
Flat/Flat or Brewster/Brewster Ends or Specified |
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晶體 |
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 |
||
|
光潔度 |
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 |
|
透過波前 |
<λ/4 per inch@633nm |
<λ/10 @632.8nm for 3-7mm |
<λ/8@633nm |
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<λ/8 per inch@632.8nm for≥7mm |
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垂直度 |
<5 arc minutes |
<5 arc minutes |
<5 arc minutes |
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通光口徑 |
Central 90% |
Central 95% |
Central 95% |
|
倒角 |
0.15*44° |
0.15*45° |
0.15*45° |
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損傷閥值 |
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) |
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鍍膜 |
AR@700-1100nm |
a)AR@10664nm,R<0.1% |
a)AR@10664nm,R<0.1% |
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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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