Nd:YAG(掺钕钇铝石榴石)

Nd:YAG(掺钕钇铝石榴石)


Nd:YAG(掺钕钇铝石榴石) 晶体是最早和最著名的激光晶体。由于它的很多基本性能优越, 故Nd:YAG仍常被用于近远红外固态激光及其倍频,三倍频应用中。

优点

高增益,高效率,激光阈值低,低损耗@ 1.06 µm
热传导性和热冲击性好
机械性能和光学性能好
适用于多种工作方式(连续,脉冲,Q -开关,锁模)

 

 基本特性

Chemical Formula: Y3Al5O12
Crystal structure: Cubic
Lattice constant: 12.01Å
Melting point: 1970°C
Density: 4.5g/cm3
Reflective Index: 1.82
Thermal Expansion Coefficient: 7.8x10-6 /K <111>
Thermal Conductivity (W/m/K): 14,  20°C
10.5,  100°C
Mohs hardness: 8.5
Stimulated Emission Cross Section: 2.8x10-19 cm-2
Relaxation Time of Terminal Lasing Level: 30 ns
Radiative Lifetime: 550 us
Spontaneous Fluorescence: 230 us
Linewidth: 0.6 nm
Loss Coefficient: 0.003 cm-1 @ 1064nm

镀膜

◇ HR-Coating: R>99.8%@1064nm and R<5%@808nm
◇ AR-Coating (Single layer MgF2): R<0.25% per surface (@1064nm)
◇ Other HR coatings, such as HR @ 1064/532 nm, HR @ 946nm, HR 1319 nm and other wavelengths are also available. 

加工能力

常规精度指标
尺寸 size up to dia.15x160mm and maximum diameter of dia.40mmx2mm
掺杂浓度 0.3~2.0(±0.1)atm%
尺寸公差 ±0.05mm
长度公差 ±0.5mm
垂直度 < 5 arc minutes
平行度 <10 arc seconds
波前畸变 Lambda/8
面形 Lambda/10
表面光洁度 S/D 10-5
柱面细磨 50-80 micro-inch (RMS)
倒角 0.1mmx45°
损伤阈值 >500MW/cm2
Nd:YAG晶体光学参数
直径 标准等级 优秀等级 最佳等级
Dia.3-6.35mm ≤0.5 fringes/ inch ≤0.25 fringes/ inch ≤0.1 fringes/ inch
≥25dB ≥28dB ≥30dB
Dia.7-10mm ≤0.7 fringes/ inch ≤0.4 fringes/ inch ≤0.16 fringes/ inch
≥22dB ≥25dB ≥28dB
Dia.11-13mm ≤1 fringes/ inch ≤0.6 fringes/ inch ≤0.2 fringes/ inch
≥20dB ≥23dB ≥26dB
Dia.14-16mm ≤1.2 fringes/inch ≤0.8 fringes/inch ≤0.25 fringes/inch
≥18dB ≥20dB ≥23dB

Notes:

Slabs, thread rod, Er:YAG, Yb:YAG,Cr:YAG,Ce:YAG,Tm:YAG,Ho:YAG and other ion doped YAG crystals are also available upon request.