LBO Crystal (Lithium Triborate Crystal)

ProductsOptical CrystalNonlinear Optical CrystalLBO Crystal (Lithium Triborate Crystal)

LBO crystals is an excellent nonlinear crystal. For frequency doubling(SHG),tripling(THG) of Nd:YAG,Nd:YLF,Nd:YVO4 lasers, it is one of the most useful nonlinear optical materials in ultraviolet and visible laser applications.

Advantages:

• broad transparency range from 160nm to 2600nm (see Figure 1);

• high optical homogeneity (δn≈10^-6/cm) and being free of inclusion;

• relatively large effective SHG coefficient (about three times that of KDP);

• wide acceptance angle and small walk-off;

• type I and type II non-critical phase matching (NCPM) in a wide wavelength range;

• spectral NCPM near 1300nm.

• high damage threshold(18.9 GW/cm 2 for a 1.3ns laser at 1053nm);

LBO has the highest damage threshold in all the commonly-used inorganic NLO crystals. Therefore, it is the best candidate for high average power SHG and other nonlinear optical processes.

Comparison of Bulk Damage Threshold (@1053nm ,1.3ns)
Crystal	Energy Density (J/cm 2 )	Power Density (GW/cm 2 )	Ratio
KTP KDP BBO LBO	6.0 10.9 12.9 24.6	4.6 8.4 9.9 18.9	1.00 1.83 2.15 4.10

LBO's main applications

• SHG, THG of Nd lasers

• SHG of Ti:Sapphire, Cr:LiSAF and Alexandrite lasers

• OPA and OPO

UPT offer LBO specification:

Tolerance of dimension	Dimension+/-0.1 mm，L：±0.1mm
Flatness	λ/8 @ 632.8nm
Wavefront distortion	<λ/4@ 632.8nm
Surface quality	10/5 per MIL-O-13830A
Parallelism	10″
Perpendicularity	5′
Bevel/chamfer	<0.1mm@45deg.
Chips	<0.1mm
Angle Tolerance	△θ≤±0.5°, △φ≤±0.5°
Coating	AR/HR/P- coating Upon request
Warranty	One year under proper use

Note: OEM Dimension, different axis angle cutting and coating and damage threshold upon request, others are available upon request.

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LBO Crystal (Lithium Triborate Crystal)