Maximum size 30x30x60 of Chinese brand LBO crystal manufactured in CRYSMIT.
LBO crystal oven for NCPM application is available.
LBO crystal for High efficient second harmonic generation (SHG, also known as frequency doubling).
High damage threshold with AR coating.
China LBO can be used in both critically and non-critically phase-matched (NCPM) .
The NCPM temperature of LBO crystal is about 149°C at type 1 SHG of 1064 nm application.
Wide acceptance angle and small walk-off.
A large quantity of LBO crystals in stock at a competitive Price.
China LiB3O5 (Lithium Triborate) nonlinear crystal is one of the most excellent nonlinear optical crystals found so far that can be used for non-critical phase matching laser frequency doubling.It has a wide transparency range, moderately high nonlinear coupling, high damage threshold and desirable chemical and mechanical properties, Which is especially important because its dispersion amount is sensitive to temperature changes.
The optical damage threshold of the LBO crystals (Negative biaxial crystal) is the highest among the commonly used inorganic nonlinear optical crystals. Therefore, LBO crystal is among the best choices for high-power second harmonic generators (also known as SHG , for example of Nd:YAG lasers 1064 nm → 532 nm) and non-critically phase-matched (NCPM).
Due to its large damage threshold, it can achieve non-critical phase matching during the frequency doubling process, which means it can achieve high-power fundamental pumping. Also, longer optical crystals can be used, which are undoubtedly useful for obtaining high-power frequency doubling lasers.
Crysmit'S LBO is featured by:
Broad transparency range from 160nm to 2600nm.
High efficient second harmonic generation (SHG, also known as frequency doubling).
LBO can be used in both critically and non-critically phase-matched (NCPM) .
The NCPM temperature of LBO crystal is about 149°C at type 1 SHG of 1064 nm application.
Wide acceptance angle and small walk-off.
High optical homogeneity (δn≈10-6/cm) and being free of inclusion.
High damage threshold.
LBO crystal Typical Applications :
SHG and THG for middle and high power Nd: lasers at 1064nm for medical, industrial and military applications.
SHG for Ti:Sapphire, Alexandrite and Cr:LiSAF lasers.
The VUV output at 187.7 nm is obtained by sum-frequency generation.
SHG and THG of high power Nd: lasers at 1342nm & 1319nm for red and blue laser.
SHG for the Nd: Lasers at 914nm & 946nm for blue laser.
NCPM SHG over a broad wavelength range from 900nm-1700nm was measured.
Phase matching process: SHG-554 nm fundamental, THG-794 nm, SFM-down to 160 nm.
Optical Parametric Amplifiers (OPA) and Oscillators ( OPO ) application.
LBO Crystal Properties - Chemical and Structural
| 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 |
| Thermal Expansion Coeficients | αx=10.8x10-5/K, αy=-8.8x10-5/K,αz=3.4x10-5/K |
| Thermal Conductivity | 3.5W/m/K |
LBO Crystal Properties - Optical and Nonlinear Optical
| 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 |
