LBO

Keywords: Crystal, LBO, Lithium Triborate LiB3O5

Jan 28, 2021 View: 2751 Data Sheet

LBO (Lithium Triborate LiB3O5) is a nonlinear optical crystal ideally suitable for various nonlinear optical applications. LBO crystals combine wide transparency, moderately high nonlinear coupling, high damage threshold and good chemical and mechanical properties.

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SRC Series LBO Crystals

Special Advantages of our LBO:

Super polished elements for excellent surface quality: roughness < 3Å RMS and scratch dig 2/1
Very low bulk absorption: up to 2ppm/cm @1064nm
Crystal size up to 50x50 mm and maximum length of 50 mm
Strict quality control

Our LBO features:

Wide transparency range (160nm – 2600nm)
Moderately high nonlinear coefficient
High damage threshold
Type I and II phase matching in a wide wavelength range
High optical homogeneity
Wide acceptance angle and small walk-off angle

Common Applications:

Second and third harmonic generation of high power diode pumped Nd:YAG and Nd:YLF lasers, Alexandrite, Ti:Sapphire, Dye lasers and ultrashort pulse lasers

Typical Specifications for LBO:

Apertures	Up to 50x50 mm2
Length	Up to 50 mm along x axis
Flatness	Up to λ/10 @1064nm
Roughness	<3Å RMS
Parallelism	Up to 5 arc sec.
Perpendicularity	Up to 5 arc min.
Scratch/Dig	2/1 up to 0/0 per custom demand
AR Coatings	Dual band R < 0.1%
Absorption Coefficient
Wave Front Distortion	λ/8 @633 nm
Laser induced Damage Threshold	800 MW/cm² @1064 nm 500 MW/cm² @532 nm 300 MW/cm² @355 nm For 10 ns pulses

Surface absorption performed @532nm on LBO crystal AR coated @1064/532nm:

Graph clearly highlights that surface absorption at 532nm performed on coated LBO Superpolished crystal (roughness <3Å) is about 4 times less absorbent than standard polished coated LBO crystal (roughness of ~10Å). Based on this difference, LBO Superpolished crystals made by us should exhibit longer lifetime.