Lithium Triborate (LBO)

LBO single crystals are attractive by a set of unique features: wide transparency range from VUV to IR, high optical damage threshold, high effective non-linear coefficients and non-critical phase matching availability, very small walk-off.

Applications:

	SHG from high power lasers: Nd:YAG, Ti:Sapphire (650 - 1100 nm), Alexandrite (700 - 800 nm) and Copper-vapor (580 nm).
	THG of YAG, Ti:Sapphire, Alexandrite lasers.
	Tunable solid-state lasers using UV (308, 355 nm), visible or IR (1064 nm) as the pump in OPO process.
	UV lasers generated from dye laser using SHG, THG or SFM.

Phase Matching Conditions:

	Phase matching process cutoff: SHG-554 nm fundamental, THG-794 nm, SFM-down to 160 nm.
	Non-critical phase matching along X axis can be achieved for 1064 nm (peaked at 149°C) and for 1080 nm (112°C).

SHG Conditions for Nd:YAG Laser (1064 nm)

	Type I	Non-critical	Type II
Phase matching angle, degrees	q = 90 j = 10.7	q = 90 j = 0	q = 90 j = 19.7
Acceptance angle width, mrad ^.cm	Dq ^. L = 57 Dj ^. L = 9	35 42	24 82
Walk-off angle	0.43	smaller	0.22
Temperature bandwidth, ° C/cm	9	3.9	-
D_eff , pm/V	1.22	1.243	1.08

LBO Main Properties

Space group	2na2₁
Point group	mm2
Lattice parameters, A	a = 8.4473 b = 7.3788 c = 5.1395 z = 2

Biaxial negative crystal with (x, y, z) - (a, b, c)

Refraction indices	n_x	n_y	n_z
Melting point, C°	834
Mohs Hardness	6
Density, g/cm³	2.47
Transparency range, nm	160 - 2600
1064 nm 532 nm 355 nm	1.5656 1.5785 1.5973	1.5905 1.6065 1.6286	1.6055 1.6212 1.6444

Optical damage thresholds at 1064 nm

Energy density, J/cm²	24.6
Power density, GW/cm²	18.9
Non-linear coefficients, pm/V	d₃₃ = 1.15 d₃₂ = 1.24 d₃₁ = -0.06

LBO single crystals with sizes up to 50 x 50 x 40 mm³ are grown using high temperature flux technique.

Element sizes: (3 - 15) x (3 - 15) x (5 - 30) mm³.

Possible deliveries - about 100 pieces (10 x 10 x 10) mm³ per year.

Laser grade polishing and single wavelength, dual wavelength or broadband coatings are provided on request.

List of products

Worldwide Distributors

Del Mar Ventures
12595 Ruette Alliante #148
San Diego, CA 92130
v/fax: (509)752-0123
delmarventures@yahoo.com