LBO Crystals - Lithium Triborate Crystal

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Application: SHG@1064 nm, Type 1

Code	W	H	L	θ	φ	Coating	Price	Delivery	Add to cart
LBO-401	3	3	10	90	11.6	AR/AR @ 1064 + 532 nm	270 $	4 - 5 days
LBO-402	3	3	15	90	11.6	AR/AR @ 1064 + 532 nm	358 $	4 - 5 days
LBO-301	4	4	10	90	11.6	AR/AR @ 1064 + 532 nm	561 $	4 - 5 days
LBO-302	4	4	15	90	11.6	AR/AR @ 1064 + 532 nm	693 $	4 - 5 days
LBO-303	4	4	20	90	11.6	AR/AR @ 1064 + 532 nm	820 $	4 - 5 days
LBO-501	5	5	10	90	11.6	AR/AR @ 1064 + 532 nm	721 $	Request
LBO-503	5	5	15	90	11.6	AR/AR @ 1064 + 532 nm	842 $	4 - 5 days
LBO-502	5	5	20	90	11.6	AR/AR @ 1064 + 532 nm	1034 $	Request

Application: NCPM SHG@1064 nm, T = 149 °C

Code	W	H	L	θ	φ	Coating	Price	Delivery	Add to cart
LBO-404	3	3	15	90	0	AR/AR @ 1064 + 532 nm	358 $	4 - 5 days
LBO-405	3	3	20	90	0	AR/AR @ 1064 + 532 nm	446 $	4 - 5 days
LBO-409	3	3	30	90	0	AR/AR @ 1064 + 532 nm	781 $	4 - 5 days
LBO-410	3	3	50	90	0	AR/AR @ 1064 + 532 nm	1430 $	4 - 5 days
LBO-304	4	4	10	90	0	AR/AR @ 1064 + 532 nm	561 $	Request
LBO-305	4	4	15	90	0	AR/AR @ 1064 + 532 nm	693 $	4 - 5 days
LBO-306	4	4	20	90	0	AR/AR @ 1064 + 532 nm	820 $	Request

Application: THG@1064 nm, Type 2

Code	W	H	L	θ	φ	Coating	Price	Delivery	Add to cart
LBO-406	3	3	10	42.2	90	AR/AR @ 1064 + 532/355 nm	270 $	4 - 5 days
LBO-407	3	3	15	42.2	90	AR/AR @ 1064 + 532/355 nm	358 $	4 - 5 days
LBO-307	4	4	10	42.2	90	AR/AR @ 1064 + 532/355 nm	561 $	Request
LBO-308	4	4	15	42.2	90	AR/AR @ 1064 + 532/355 nm	693 $	Request
LBO-507	5	5	10	42.2	90	AR/AR @ 1064 + 532/355 nm	721 $	Request
LBO-508	5	5	15	42.2	90	AR/AR @ 1064 + 532/355 nm	842 $	4 - 5 days

Type 1 Phase Matching LBO Crystals

Different SHG, THG, and OPO applications

Type 2 Phase Matching LBO Crystals

Different SHG, THG, and OPO applications

Flatness	λ/8 @ 633 nm
Parallelism	< 20 arcsec
Perpendicularity	< 5 arcmin
Angle tolerance	< 30 arcmin
Aperture tolerance	± 0.1 mm
Surface quality	10/5 scratch & dig per MIL-O-13830A
Clear aperture	90% of full aperture

Physical and Optical Properties

Chemical formula	LiB₃O₅
Crystal structure	orthorhombic, mm²
Optical symmetry	Negative biaxial
Space group	Pna2₁
Density	2.47 g/cm³
Mohs hardness	6
Optical homogeneity	∂n = 10^-6 cm^-1
Transparency region at “0” transmittance level	155 – 3200 nm
Linear absorption coefficient at 1064 nm	< 0.01 % cm^-1
Refractive indices: at 1064 nm at 532 nm at 355 nm	nx ny nz 1.5656 1.5905 1.6055 1.5785 1.6065 1.6212 1.5971 1.6275 1.6430
Sellmeier equations (λ, μm)	nx² = 2.4542 + 0.01125 / (λ² – 0.01135) – 0.01388 λ²
	ny² = 2.5390 + 0.01277 / (λ² – 0.01189) – 0.01849 λ² + 4.3025 × 10^-5λ⁴ - 2.9131 × 10^-5λ⁶
	nz² = 2.5865 + 0.01310 / (λ² – 0.01223) – 0.01862 λ² + 4.5778 × 10^-5λ⁴ - 3.2526 × 10^-5λ⁶
Phase matching range Type 1 SHG	554 – 2600 nm
Phase matching range Type 2 SHG	790 – 2150 nm
NCPM SHG temperature dependence: Type 1 range 950 – 1300 nm Type 1 range 1300 – 1800 nm Type 2 range 1100 – 1500 nm	T1 = - 1893.3λ⁴ + 8886.6λ³ – 13019.8λ² + 5401.5λ + 863.9 T2 = 878.1λ⁴ – 6954.5λ³ + 20734.2λ² – 26378λ + 12020 T3 = - 21630.6λ⁴ + 112251λ³ – 220460λ² + 194153λ – 64614.5
NCPM SHG at 1064 nm Type 1 temperature	149 °C
NCPM SHG at 1319 nm Type 2 temperature	43 °C
Walk-off angle	7 mrad (Type 1 SHG 1064 nm)
Thermal acceptance	6.4 K×cm (Type 1 SHG 1064 nm)
Angular acceptance	6.5 mrad×cm (Type 1 SHG 1064 nm) 248 mrad×cm (Type 1 NCPM SHG 1064 nm)
Nonlinearity coefficients at 1064nm:	d₃₁ = (1.05±0.09) pm/V d₃₂ = -(0.98±0.09) pm/V d₃₃ = (0.05±0.006) pm/V
Effective nonlinearity: XY plane YZ plane	d_ooe = d₃₂ cosφ d_oeo = d_eoo = d₃₁ cosθ
Expansion coefficients:	α_x = 10.8 × 10^-5K^-1 α_y = -8.8 × 10^-5K^-1 α_z = 3.4 × 10^-5K^-1

EKSMA Optics LBO Crystals
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Lithium Triborate (LBO) is a nonlinear optical crystal with a combination of unique features:

Wide transparency region
Broad Type 1 and Type 2 non-critical phase-matching (NCPM) range
Small walk-off angle
High damage threshold
Wide acceptance angle
High optical homogeneity

LBO crystal is perfectly suitable for various nonlinear optical applications, like frequency doubling and tripling of high peak power pulsed Nd doped, Ti:Sapphire and Dye lasers, optical parametric oscillators (OPO) of both Type 1 and Type 2 phase-matching, non-critical phase-matching for conversion of CW and quasi-CW radiation.

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