Descriptions:
Lithium
niobate (LiNbO3, LN) is a multi-purpose material in photonics and
optoelectronics fields. It features excellent nonlinear, electro-optic, and piezoelectric properties.
it is widely used as electro-optic modulators and Q-switches for Nd:YAG, Nd:YLF
and Ti:Sapphire lasers as well as modulators for fiber optics.
Main
applications:
1） Electro-optic modulation and Q-switching
2） Optical parametric oscillators (OPO) pumped at
1064 nm
3） Quasi-phase-matched devices with periodically
poled lithium niobate (PPLN)
Advantages:
1) Broad
transparency region from 420 nm to 5200 nm
2) High
nonlinear, electro-optic and acousto-optic coefficients
3) Nonhygroscopic,
mechanically, and chemically stable
Nonlinear properties
of LiNBO3 crystal
|
NLO Coefficients
|
d33 = 34.4 pm/V
d31 = d15 = 5.95
pm/V
d22 = 3.07 pm/V
|
|
Effective NLO coefficients
|
deff =5.7 pm/V for frequency doubling 1300
nm;
deff =5.3
pm/V for OPO pumped at 1064 nm;
deff =17.6
pm/V for quasi-phase-matched structure.
|
|
Electro-Optic Coefficients
|
γT33 = 32 pm/V, γs33 = 31 pm/V,
γT31 = 10 pm/V,
γs31 = 8.6 pm/V,
γT22 = 6.8
pm/V, γs22 = 3.4 pm/V,
|
|
Photorefractive Damage Threshold
|
50 MW/cm2 (10 ns, 1064 nm)
|
|
Surface Damage Threshold
|
300 MW/cm2 (10 ns, 1064 nm)
|
Physical
properties of LiNBO3 crystal
|
Chemical Formula
|
LiNbO3
|
|
Lattice Constant,A
|
a=b=5.148 Å, c=13.863 Å
|
|
Melting Point
|
1250℃
|
|
Density
|
4.64g/cm3
|
|
Curie Temperature
|
~ 1140℃
|
|
Mohs Hardness
|
5
|
|
Thermal Expansion
|
a11 =15.4×10-6/K a33 =7.5×10-6/K
|
|
Thermal Conductivity, W/(m K) at 300 K
|
5.6
|
|
Refractive Indices
|
n0 =2.286 ne =2.203 @632.8nm
|
|
Nonlinear Optical Coefficients, p/m/V at 1064 nm
|
d31 = -4.5 d33 = -0.27 d22 = 2.1
|
|
Electro-Optical Coefficients, pm/V at 633nm
|
γT33 =31, γs 31=9, γs 22 =3.4
|
|
Transmittance Range Transmittance
|
420~ 5200nm >68% @632.8nm
|
|
The Sellmeier equations (λ: um)
|
n02(λ)=4.9048+0.11768/(λ2-0.04750)-0.027169×λ2 ne2(λ)=4.5820+0.099169/(λ2-0.04443)-0.021950×λ2
|
HGO offers LiNBO3 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/HR coating upon customer’s request
|
|
Electrodes
|
Gold/Chrome plated on X-faces
|
|
Damage Threshold
|
750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz
|
|
Quality Warranty Period
|
One
year under proper use
|
Why
Choose HGO ?
HGO offers both pure Lithium niobate(LiNbO3, LN) and 5%MgO
doped Lithium niobate (LiNbO3, LN) crystals for Q-switch
with transverse E-O modulation,second harmonic generation (SHG), sum
frequency generation (SFG), different frequency generation (DFG),or optical
parametric generation (OPA). High quality of LN with 1/10 wave front distortion
can be supplied by HGO.
