LBO Crystal (Lithium Triborate Crystal)----United photonics technology
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 | 6.0 | 4.6 | 1.00 |
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.
