Descriptions：
HGO grows Lithium Triborate (LiB3O5, LBO) Nonlinear crystals using flux technology. LBO a broad
transparency range, wide acceptance angle, small walk-off angle, and the
highest damage threshold among common nonlinear crystals.
Most common applications include high-power near-infrared
wavelength second harmonic generation, sum-frequency generation to produce
visible, ultraviolet laser light, and visible, near-infrared widely tuned
optical parametric oscillators. HGO are
capable of providing uncoated super-polished LBO crystals desired, e.g. for
high-power UV generation via sum-frequency generation of 1064 nm and
532 nm.
Main
applications:
1)
SHG, THG
2)
OPA and OPO
Advantages:
1） Broad transparency range from 160nm
to 2600nm;
2） High optical homogeneity (δn≈10-6/cm)
and free of inclusion;
3） Large effective SHG coefficient;
4） Wide acceptance angle and small walk-off;
5） Type I and type II non-critical phase matching
(NCPM) in a wide wavelength range;
6） High damage threshold(18.9 GW/cm 2 for a 1.3ns
laser at 1053nm)
7） Spectral
NCPM near 1300nm
Optical and
Nonlinear properties of LBO crystal
|
Transparency Range
|
160-2600nm
|
|
SHG Phase Matchable Range
|
551-2600nm (Type
I) 790-2150nm (Type II)
|
|
Therm-optic Coefficient (/℃, λ in μm)
|
dnx/dT=-9.3x10-6
dny/dT=-13.6x10-6
dnz/dT=(-6.3-2.1λ)x10-6
|
|
Absorption Coefficients
|
<0.1%/cm at 1064nm
<0.3%/cm at 532nm
|
|
Angle Acceptance
|
6.54mrad·cm (φ, Type I,1064
SHG)
15.27mrad·cm (θ, Type II,1064 SHG)
|
|
Temperature Acceptance
|
4.7℃·cm (Type I, 1064 SHG)
7.5℃·cm (Type II,
1064 SHG)
|
|
Spectral Acceptance
|
1.0nm·cm (Type I, 1064 SHG)
1.3nm·cm (Type II, 1064 SHG)
|
|
Walk-off Angle
|
0.60° (Type I 1064 SHG)
0.12° (Type II 1064 SHG)
|
|
NLO Coefficients
|
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)
|
|
Non-vanished NLO susceptibilities
|
d31=1.05± 0.09 pm/V
d32= -0.98± 0.09 pm/V
d33=0.05± 0.006 pm/V
|
|
Sellmeier Equations (λ in μm)
|
nx2=2.454140+0.011249/(λ2-0.011350)-0.014591λ2-6.60×10-5λ4
ny2=2.539070+0.012711/(λ2-0.012523)-0.018540λ2+2.00×10-4λ4
nz2=2.586179+0.013099/(λ2-0.011893)-0.017968λ2-2.26×10-4λ4
|
Physical
properties of LBO crystal
|
Crystal Structure
|
Orthorhombic, Space group Pna21, Point group mm2
|
|
Lattice Parameter
|
a=8.4473Å,b=7.3788Å,c=5.1395Å,Z=2
|
|
Melting Point
|
About 834℃
|
|
Mohs Hardness
|
6
|
|
Density
|
2.47g/cm3
|
|
Refractive indices
|
nX= 1,5656; nY= 1,5905; nZ= 1,6055 @1064 nm
|
|
Thermal Conductivity
|
3.5W/m/K
|
|
Thermal Expansion Coefficients
|
αx=10.8x10-5/K, αy=-8.8x10-5/K,αz=3.4x10-5/K
|
HGO offers LBO specifications:
|
Tolerance of cutting angle
|
△θ≤±0.25°,△φ≤±0.25°
|
|
Tolerance of dimension
|
Dimension+0/-0.1 mm，L：±0.1mm
|
|
Flatness
|
λ/10 @ 632.8nm
|
|
Wavefront distortion
|
λ/8@ 632.8nm
|
|
Surface quality
|
10/5 per MIL-O-13830A
|
|
Parallelism
|
20″
|
|
Perpendicularity
|
5′
|
|
Clear Aperture:
|
> 90%
|
|
Chamfer:
|
< 0.1 mm @ 45°
|
|
Size
|
Upon customer request
|
|
Coating
|
AR/PR coating upon customer’s request
|
|
Damage Threshold
|
750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz
|
|
Quality Warranty Period
|
One
year under proper use
|
Why
Choose HGO ?
HGO grows
LBO crystals( Lithium Triborate Crystal) in house using Flux growth technology.
High quality of starting material is used for crystal growth and strict quality
control is applied to our LBO’s absorption ,scattering loss, bulk
loss ,wavefront distortion ,inclusions and all the other required processing
specs which assures that each crystal from HGO will comply with will comply
with customer’s specification and perform well in
laser system.
HGO can supply large
size of LBO up to 30mm*30mm*30mm and max
length up to 60mm. We have over 13 years crystals growth experiences and HGO’s LBO has been well recognized as high
qulity and low price by our customers from all over the world.
