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LBO 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 

l SHG, THG of Nd lasers

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

l OPA and OPO

 

HGO offer LBO specification:

Tolerance of cutting angle

△θ≤±0.25°,△φ≤±0.25°

Tolerance of dimension

Dimension+/-0.1 mm,L:±0.1mm

Flatness

λ/8 @ 632.8nm

Wavefront distortion

λ/8@ 632.8nm

Surface quality

10/5  per MIL-O-13830A

Parallelism

10″

Perpendicularity

5′

Bevel/chamfer

<0.1mm@45deg.

Chips

<0.1mm

CA

>95%

Coating

AR/P-coating Upon customer’s request

Damage Threshold

  750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz

Warranty

        One year under proper use