Nd:YAG

产品分类:YAG, 激光晶体

我司的Nd:YAG 晶体产品,又称掺钕钇铝石榴石晶体,是一种综合性能良好的用作固态激光器的激光介质晶体。Nd:YAG晶体中的原子被闪光灯激发,晶体产生以特定波长(1064 nm)传播的放大光。Nd:YAG晶体在生物物理,医学,军事,机械,科研和建筑等领域有着广泛的应用。该产品有高光学质量、良好的机械和热性能的特点。Nd:YAG是通过将Nd离子掺杂到YAG晶体中而获得的成熟的激光晶体之一。Nd:YAG激光晶体的吸收带宽为730-760nm和790-820nm,通常由闪光管或激光二极管泵浦。典型的激光发射峰值为1064nm,波长为946nm,1120nm,1320nm和1440nm激光也可以通过一些测量发射,Q开关和锁定模式适用于获得不同波长的激光(532nm,分别为266nm,213nm等)和脉冲宽度(10-25ns)。Nd:YAG晶体广泛用于各类固态激光器系统——倍频连续波、高能调Q等。通常,高浓度掺杂晶体应用于脉冲激光器中,低浓度掺杂晶体通常用于连续波输出。

特点

  • 增益系数高
  • 激光阈值低
  • 优异的光学,机械和物理性能
  • 高斜率效率
  • 宽吸收带宽

Nd:YAG

参数

材料规格

钕浓度公差(atm%)0.1- 2.5(+/-0.1)atm%
取向[001] or [110] or [111] <±0.5°
平行性10
垂直性
表面质量10-5(MIL-O-13830A)
波前失真λ/4@632 nm
表面平整度λ/8@632 nm
通光孔径>95 %
倒角<0.2×45°
长度公差+0.5/-0mm
厚度/直径公差±0.05 mm
最大尺寸dia (3~12.7)×(3~150) mm
损坏阈值>750 MW/cm2@1064 nm 10 ns 10 Hz
消光比>30 dB(取决于实际尺寸)
精密研磨400 grit

物理和化学特性

晶体结构立方 – la3d
晶格常数12.01 Å
密度4.56 g/cm3
熔点1950 °C
导热系数/(W·m-1·K-1 @ 25°C)0.14 W
比热/(J·g-1·K-1)0.59
断裂应力1.3-2.6*103 kg/cm2
热膨胀率/(10-6·K-1 @ 25°C)[100] 取向–8.2
[110] 取向–7.7
[111] 取向–7.8
硬度(莫氏)8.5
杨氏模量/ GPa317
剪切模量/ Gpa54.66
消光比25 dB
泊松比0.25

光学和光谱性质

激光跃迁4F3/2 →> 4I11/2
光子能量1.86×10-19 J
激光跃迁波长,λl(nm)1064
泵浦跃迁波长,λp(nm)808
泵浦跃迁带宽,Δλp(nm)<4
激光跃迁带宽,Δλl(nm)~0.6
泵过渡峰截面,σp(E-20 cm2)6.7
激光跃迁峰截面,σl(E-20 cm2)28
泵过渡饱和强度φp(kW / cm2)12
激光跃迁饱和强度φl(kW / cm2)2.6
激光跃迁饱和通量Γl,sat(J / cm2)0.6
最小泵浦强度Imin(kW / cm2)~0
上部激光管寿命,τ(毫秒)0.26
量子缺陷分数0.24
分数热产生0.37
折光率1.8197 @1.064 µm
荧光寿命230 µs

吸收和发射光谱

Nd-YAG激光晶体-发射谱-南京光宝-CRYLINKNd-YAG激光晶体-吸收谱-南京光宝-CRYLINK

参考文献

[1] Siqi, Zhu, Zaijun, et al. A \\{LD\\} side-pumped deep ultraviolet laser at 266 nm by using a Nd:YAG/Cr4+:YAG/YAG composite crystal[J]. Optics & Laser Technology, 2014.
[2]  Panahibakhsh S ,  Jelvani S ,  Maleki M H , et al. Characterization of the optical properties of ArF laser irradiated Nd:YAG crystal[J]. Optik – International Journal for Light and Electron Optics, 2016.
[3] Lin, Hong-Yi, Sun, et al. Comparative study between Nd:GYSGG and Nd:YAG lasers passively Q-switched by a Cr:YAG crystal[J]. Journal for Light and Electronoptic, 2018.
[4]  Kanchanavaleerat E , D Cochet-Muchy,  Kokta M , et al. Crystal growth of high doped Nd:YAG[J]. Optical Materials, 2004, 26(4):337-341.
[5]  Zhang M ,  Guo H ,  Han J , et al. Distribution of Neodymium and properties of Nd:YAG crystal by horizontal directional solidification[J]. Journal of Crystal Growth, 2012, 340(1):130-134.
[6]  Panahibakhsh S ,  Jelvani S ,  Maleki M H , et al. Effect of XeCl laser irradiation on the defect structure of Nd:YAG crystals[J]. Optics & Lasers in Engineering, 2014, 60(sep.):12-17.
[7]  Ikesue A ,  Yan L A ,  Yoda T , et al. Fabrication and laser performance of polycrystal and single crystal Nd:YAG by advanced ceramic processing[J]. Optical Materials, 2007, 29(10):1289-1294.
[8]  Fu Y ,  Ge L ,  Li J , et al. Fabrication, microstructure and laser performance of composite Nd:YAG transparent ceramics[J]. Optical Materials, 2016:S0925346716302415.
[9]  Ren Y ,  Zhang L ,  Romero C , et al. Femtosecond laser irradiation on Nd:YAG crystal: Surface ablation and high-spatial-frequency nanograting[J]. Applied Surface Science, 2018, 441(MAY31):372-380.
[10]  Li S L ,  Ye Y K ,  Wang M W . Femtosecond laser written channel optical waveguide in Nd:YAG crystal[J]. Optics & Laser Technology, 2014, 58(6):89–93.
[11]  Yadegari M ,  Asadian M ,  Saeedi H , et al. Formation of gaseous cavity defect during growth of Nd:YAG single crystals[J]. Journal of Crystal Growth, 2013, 367(mar.15):57-61.
[12]  Vatnik S M . Gain and laser operation of 1.1%Nd:YAG crystal fibers[J]. Optics Communications, 2001, 197(4-6):375-378.
[13]  Dong J ,  Deng P ,  Gan F , et al. Highly doped Nd:YAG crystal used for microchip lasers[J]. Optics Communications, 2001, 197(4-6):413-418.
[14] Meng-yao, Wu, Peng-fei, et al. Investigation of multi-segmented Nd:YAG/NdYVO4 crystals and their laser performance end-pumped by a fiber coupled diode laser[J]. Optik, 2019, 179:367-372.
[15]  Yuan Y ,  Li B ,  Guo X . Laser diode pumped Nd:YAG crystals frequency summing 589nm yellow laser[J]. Optik – International Journal for Light and Electron Optics, 2016, 127(2):710-712.
[16]  Sokol M ,  Kalabukhov S ,  Kasiyan V , et al. Mechanical, thermal and optical properties of the SPS-processed polycrystalline Nd:YAG[J]. Optical Materials, 2014, 38(7):204-210.
[17] Walsh,  Brian M . Nonlinear mixing of Nd:YAG lasers; harmonic and sum frequency generation[J]. Optical Materials, 2016:S0925346716303548.
[18]  Torchia G A , C Méndez,  Roso L , et al. Optical spectroscopy in channel waveguides made in Nd:YAG crystals by femtosecond laser writing[J]. Journal of Luminescence, 2008, 128(5-6):754-756.
[19]  Qiang A ,  Dong N ,  Feng C , et al. Photonic crystal structure in Nd:YAG laser crystals[J]. Optical Materials, 2012, 34(11):1811-1814.
[20]  Li S ,  Ma P ,  Zhu X , et al. Post-treatment of nanopowders-derived Nd:YAG transparent ceramics by hot isostatic pressing[J]. Ceramics International, 2017, 43(13):10013-10019.
[21]  Ma B ,  Zhang W ,  Shen B , et al. Preparation and characterization of highly transparent Nd:YAG/YAG composite ceramics[J]. Optical Materials, 2018, 79:63-71.
[22]  Wei S ,  Junji Z . Preparation and properties of Yb:YAG and Nd:YAG nanocrystals[J]. Rare Metal Materials and Engineering, 2017, 46(3):591-595.
[23]  Banerjee J ,  Muralidhar K . Role of internal radiation during Czochralski growth of YAG and Nd:YAG crystals[J]. International Journal of Thermal Sciences, 2006, 45(2):151-167.
[24]  Nurmohammadi T . Optik – International Journal for Light and Electron Optics.  2014.
[25]  Kosti? S ,  Lazarevi? Z ? ,  Radojevi? V , et al. Study of structural and optical properties of YAG and Nd:YAG single crystals[J]. Materials Research Bulletin, 2015, 63:80-87.
[26]  An Q ,  Jia Y ,  Liu H , et al. Ultrafast laser inscribed cladding waveguides in Nd:YAG crystal for mid-infrared wavelength[J]. Optics & Laser Technology, 2014, 56:382-386.
[27]  Ajates J G ,  Romero C ,  Castillo G R , et al. Y-junctions based on circular depressed-cladding waveguides fabricated with femtosecond pulses in Nd:YAG crystal: A route to integrate complex photonic circuits in crystals[J]. Optical Materials, 2017, 72:220.

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