LBO

产品分类:非线性晶体

LiB3O5(三硼酸锂)晶体是迄今发现可用于非临界相位匹配激光倍频的最为优良的非线性光学晶体之一,它具有良好的非线性光学特性及稳定的物化性能,其中尤为重要的是,它的色散量对温度变化很敏感,在倍频过程中可以实现非临界相位匹配,由于它的破坏阀值很大,意味着可以实现大功率的基波泵浦,同时也可采用较长的光学晶体,这些无疑对获取大功率的倍频激光很有帮助。

在1.064μm光下,LBO晶体的有效SHG系数是KDP的3倍。LBO的光损伤阈值是常用无机非线性光学晶体中最高的。因此,它是高功率二次谐波发生器和其他非线性光学应用的最佳选择之一。

特点

  • 高光学均匀性;
  • 透明区域广泛;
  • 可调波长范围大;
  • 对水分的敏感性低;
  • 接收角度宽,离散角度小;
  • 光谱非临界相位匹配(NCPM)接近1300nm;
  • 倍频转换效率较高(相当于KDP晶体的3倍);
  • I,II类非临界相位匹配(NCPM)的波段范围宽;
  • 高损伤阈值(脉宽为1.3ns的1053nm激光可达10GW/cm2);

LBO

参数

物理和化学特性

属性数值
化学式LiB3O5
晶体结构斜方,空间群Pna21,点群mm2
晶格参数a=8.4473Å ,b=7.3788Å, c=5.1395Å, Z=2
质量密度2.47 g/cm3
莫氏硬度6
熔点About 834°C
导热系数3.5W/m/K
双折射负双轴晶体:λ=0.5321μm2Vz =109.2˚

非线性光学性质

属性数值
SHG相位匹配范围551 ~ 2600nm (Type I);790-2150nm (Type II)
NLO系数deff(I)=d32cosΦ(XY平面中的I型)
deff(I)=d31cos2θ+d32sin2θ(XZ平面中的I型)
deff(II)=d31cosθ(YZ平面中的II型)
deff(II)=d31cos2θ+d32sin2θ(XZ平面中的II型)
NLO敏感性未消失d31=1.05 ± 0.09 pm/V
d32=-0.98 ± 0.09 pm/V
d33= 0.05 ± 0.006 pm/V
热光学系数(°Cλinμmdnx/dT=-9.3X10-6
dny/dT=-13.6X10-6
dnz/dT=(-6.3-2.1λ)X10-6
角度接受6.54mrad-cmΦI型,1064 SHG15.27mrad-cmqII型,1064 SHG

线性光学性质

属性数值
透明范围169 – 2600 nm
吸收系数<0.1%/cm @1064nm;<0.3%/cm @532nm
折光指数 
1.0642 mmnx = 1.5656, n= 1.5905, nz=1.6055
0.5321 mmn= 1.5785, n= 1.6065, nz=1.6212
0.2660 mmnx = 1.5973, ny = 1.6286, nz=1.6444
Sellmeier方程(λ in μmnx2=2.454140+0.011249/(λ2-0.011350)-0.014591λ2-6.60×10-5λ4
ny2=2.539070+0.012711/(λ2-0.012523)-0.018540λ2+2.0×10-4λ4
nz2=2.586179+0.013099/(λ2-0.011893)-0.017968λ2-2.26×10-4λ4

相位匹配角实验值(T=293K)

相互作用波长[μm]Φexp [deg]θexp [deg]
XY平面θ= 90°  
          SHG, o+o  e
1.9080.95423.8 
1.50.757 
1.07960.539810.6/10.7 
1.06420.532111.3/11.4/11.6/11.8 
0.9460.47319.4/19.5 
0.9300.46521.3 
0.8960.44823.25 
0.880.4424.53 
0.8500.42527 
0.840.4227.92 
0.8360.41828.3 
0.800.4031.7 
0.7940.39732.3 
0.7860.39333 
0.780.3933.7 
0.77350.3867534.4 
0.750.37537.13/37 
0.7460.37337.5 
0.70940.354741.8/41.9/42/43.5 
0.630.31555.6 
0.5550.277586 
0.5540.27790 
          SFG, o+o  e  
1.3414+0.67070.4471320 
1.0642+0.53210.3547337/37.1/37.2 
1.053+0.52650.35138.2 
1.0642+0.354730.2660560.7/61 
0.86+0.430.286761 
1.3188+0.266050.2213970.2 
0.21284+2.355240.195250.3 
0.21284+1.900070.191463.8 
0.21284+1.589100.1877488 
YZ 平面, Φ=90◦  
          SHG, o+e  o
1.9080.954 46.2
1.50.75 14.7
1.07960.5398 19.2
1.06420.5321 19.9/20.5/20.6/21.0
          SFG, o+e  o  
1.0641+0.532050.3547 42/42.7
1.0642+0.53210.35473 42.2/42.5/43.2
XZ 平面, Φ=0◦, θVZ  
          SHG, e+o  e
1.34140.6707 3.6/4.2/5.0
1.31880.6594 5.2
1.30.65 5.4
XZ 平面, Φ=0◦, θVZ  
          SHG, e+e  o
1.34140.6707 86.1/86.3/86.6
1.31880.6594 86
1.30.65 86.1
1.240.62 86

非关键相位匹配(NCPM)温度的实验值

相互作用波长[μm]T[]
沿X          SHG, type 
1.5470.7735117
1.460.7350
1.2520.6263.5
1.250.625-2.9
1.2150.607521
1.2110.605520
1.2060.60324
1.20.624.3
1.150.57561.1
1.1350.567577.4
1.110.555108.2
1.07960.5398112
1.06420.5321148/148.5/149/149.5/151
1.0470.5235166.5/167/172/175/176.5/180
1.0250.5125190.3
          SFG, type 
1.908+1.06420.683281
1.444+1.080.617923
1.135+1.06420.5491112
1.547+0.77350.5157141
          DFG, type 
0.532-0.81.588135
沿Z          SHG, type II 
1.3420.67135
1.30.6546

光谱

LBO传输频谱

LBO非线性晶体的SHG调谐曲线

在不同的泵浦光(即530 nm,355 nm和266 nm)下,LBO(在“ XY”平面上的Type I(ooe))的OPO调谐曲线

参考文献

[1]  Zubrinov I I ,  Sapozhnikov V K ,  Pylneva N A , et al. Elastic and elastooptic properties of LiB 3O 5[J]. Ceramics International, 2004, 30(7):1675-1677.
[2] Reinvestigation on the phase transition of a LiB3O5 crystal near its melting point[J]. Journal of Crystal Growth, 2016, 435:1-5.
[3]  A Y J ,  A C L J ,  A L W , et al. The optical properties of planar waveguides in LiB3O5 crystals formed by Cu+ implantation – ScienceDirect[J]. Applied Surface Science, 2006, 253( 5):2674-2677.
[4]  Yang L ,  Yue Y ,  Mao Q , et al. Growth and nonlinear optical properties of Zn-doped LiB3O5 crystals[J]. Optical Materials, 2015, 43:6-9.
[5]  Kananen B E ,  Mcclory J W ,  Giles N C , et al. Copper-doped lithium triborate (LiB3O5) crystals: A photoluminescence, thermoluminescence, and electron paramagnetic resonance study[J]. Journal of Luminescence, 2017:S0022231317309109.
[6]  Shepelev Y F ,  Bubnova R S ,  Filatov S K , et al. LiB3O5 crystal structure at 20, 227 and 377°C[J]. Journal of Solid State Chemistry, 2005, 178(10):2987-2997.
[7]  Nikolov I ,  Perlov D ,  Livneh S , et al. Growth and morphology of large LiB 3O 5 single crystals[J]. Journal of Crystal Growth, 2011, 331(1):1-3.
[8]  Surovtsev N V ,  Malinovsky V K ,  Solntsev V P , et al. Peculiarities of LiB3O5 crystallization from melts studied by Raman spectroscopy[J]. Journal of Crystal Growth, 2008, 310(15):3540-3544.
[9]  Ogorodnikov I N ,  Kruzhalov A V ,  Porotnikov A V , et al. Dynamics of electronic excitations and localized states in LiB3O5[J]. Journal of Luminescence, 1998, 76-77(2):464-466.
[10]  I. N , Ogorodnikov, and, et al. Sub-nanosecond time-resolved spectroscopy of LiB3O5 under synchrotron radiation[J]. Journal of Luminescence, 1997.
[11]  Depci T ,  Oezbayoglu G ,  Yilmaz A , et al. The thermoluminescent properties of lithium triborate (LiB3O5) activated by aluminium[J]. Nuclear Inst & Methods in Physics Research B, 2008, 266(5):755-762.
[12]  Neumair S C ,  Vanicek S ,  Kaindl R , et al. High-pressure synthesis and crystal structure of the lithium borate HP-LiB3O5[J]. Journal of Solid State Chemistry, 2011, 42(52):no-no.
[13]  Kannan C ,  Kimura H ,  Miyazaki A , et al. Nucleation, growth and characterization of LiBO single crystals[J]. Journal of Crystal Growth, 2005, 275(1–2):e769-e774.
[14]  Lim A R ,  Yoon C S . Structural nature of 7Li and 11B sites in the nonlinear optical material LiB3O5 using static NMR and MAS NMR[J]. Materials Chemistry & Physics, 2014, 147(3):644-648.
[15]  Li H Q ,  Zhang H B ,  Bao Z , et al. High-power nanosecond optical parametric oscillator based on a long LiB3O5 crystal[J]. Optics Communications, 2004, 232(1-6):411-415.
[16]  Kannan C ,  Ganesamoorthy S ,  Rajesh D , et al. Anisotropic properties of self-flux grown LiB 3O 5 single crystals[J]. Solid State Communications, 2005, 136(4):215-219.
[17]  Ogorodnikov I N ,  Isaenko L I ,  Kruzhalov A V , et al. Thermally stimulated luminescence and lattice defects in crystals of alkali metal borate LiB3O5 (LBO)[J]. Radiation Measurements, 2001, 33(5):577-581.
[18]  Sabharwal S C ,  Tiwari B , Sangeeta. Investigations on the growth of LiB 3 O 5 crystal by top-seeded solution growth technique[J]. Journal of Crystal Growth, 2004, 263(1/4):327-331.
[19]  Sabharwal S C ,  Tiwari B , Sangeeta. Effect of highest temperature invoked on the crystallization of LiB 3O 5 from boron-rich solution[J]. Journal of Crystal Growth, 2003, 249(3):502-506.
[20]  Almeida A ,  Thomazini D ,  Vasconcelos I F , et al. Structural studies of lithium triborate (LBO–LiB3O5) in borophosphate glass-ceramics[J]. International Journal of Inorganic Materials, 2001, 3(7):829-838.

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