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Crystals |
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Tel:+86-(0)591-87846955 +86-(0)591-87846952 Fax: +86-(0)591-87856157 Address:NO. 67, YangQi Road, JinShan FuWan Industrial Park, Fuzhou, FuJian, 350026, China E-mail: sales@phosctech.com Website: www.phosctech.com |
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LBO Crystal |
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Lithium Triborate (LBO) Crystals
LBO (LiB3O5) is an excellent non-linear optical crystal. It’s phase matchable for the SHG and THG of Nd:YAG and Nd:YLF lasers, using either type I or type II interaction. LBO is a non-linear optical crystal perfectly suited for harmonic generation as well as sum frequency mixing and OPO applications using widely spread Nd lasers, Ti:Sapphire and Dye lasers. Such physical LBO properties as excellent optical homogeneity, non hygroscopicity and very high damage threshold assure long and stabile operation of crystal. LBO crystal is the first choice as harmonic generator of high peak power pulsed lasers.
Basic Properties:
Crystal Structure
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Orthohomic, Space group Pna21
Point group mm2
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Lattice Parameters
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a = 8.4473Å, a = 7.3788Å, c = 5.139Å, z = 2
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Melting Point
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About 834°C
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Mohs Hardness
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6
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Density
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2.47 g/cm3
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Thermal Conductivity
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3.5W/m/K
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Thermal Expansion Coefficient
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ax=10.8x10-5/k av=-8.8x10-5/k az=3.4x10-5/k
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Optical Properties:
Transparency Range
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160-2600nm
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SHG Phase Matchable Range
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551-2600nm(Type I) 790-2150(Type II)
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Refractive Indices
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1.0642um nx=1.5656, nv=1.5905, ne=1.6055
0.5321um nx =1.5785, nv =1.6065, ne =1.6212
0.2660um nx =1.5973, nv =1.6286, ne =1.6444
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Therm-Optic Coefficient
(°C, λ in μ m)
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dnx/dT=-9.3X10-6
dny/dT=-13.6X10-6
dnz/dT=(-6.3-2.1 λ)X10-6
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Absorption Coefficient
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<0.1%/cm at 1664nm
<0.3%/cm at 532nm
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LBO Coefficients
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deff(I)=d32cosφ (Type I in XY plane)
deff(I)=d31cos2θ+d32sin2θ (Type I in XZ plane)
deff(II)=d31cosθ (Type II in YZ plane)
deff(II)=d31cos2θ+d32sin2θ (Type II in XZ plane)
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Non-vanished LBO susceptibilities
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d31=1.05±0.09pm/V
d32=-0.98±pm/V
d33=0.05±0.006pm/V
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Sellmeier Equations
(λ in μ m)
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nx2=2.454140+0.011249/( λ2-0.011350)-0.014591 λ2-6.60x10-5 λ4
ny2=2.539070+0.012711/( λ2-0.012523)-0.018540 λ2=2.0x10-4 λ4
nz2=2.586179+0.013099/( λ2-0.011893)-0.017968 λ2=2.26x10-4 λ4
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Capabilities:
Optical:
Attribute
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Commercial
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High Precision
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Dimensions
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Large crystal size up to30x30x30mm3 and maximum length of 60mm
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Wavefront Distortion
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λ/8
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λ/8
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Orientation
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±0.25°
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±0.2°
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End-faces Configuration
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Flat
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Dimension Tolerance
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±0.1mm
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±0.01mm
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Surface Quality
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10-5 scratch and dig
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10-5 scratch and dig
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Flatness
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λ/8
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λ/10
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Parallelism
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20"
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10"
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Perpedicularityy
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15'
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5'
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Intrinsic Loss
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Less than 0.1%/cm at 1064nm
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Coating:
> DBAR, Nd:YAG Laser
> Lower reflection, R<0.2% at 1064nm, R<0.5% at 532nm
> High damage threshold, >500MW/cm2 at both wavelengths 1064nm and 532nm
> High efficiency
> BBAR, Tunable Laser
> Customer designed coating
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