LBO

Technical Specifications

Custom specifications available upon request

Product Features

Our company can provide high‑quality, large‑size LBO crystals. By precisely controlling the growth process, we effectively reduce inclusions and stress in the crystals, significantly improving their optical quality and laser damage threshold. They are suitable for applications such as high‑power second‑harmonic generation, third‑harmonic generation, and optical parametric oscillation (OPO).

Basic Characteristics

Physical Quantity	Value	Remarks
Crystal Structure	Orthorhombic	/
Lattice Parameters	a=8.4473 Å, b=7.3788 Å, c=5.139 Å, Z=2, Room temperature	Room temperature
Melting Point	834 °C	/
Mohs Hardness	6	/
Density	2.47 g/cm³	/
Thermal Conductivity	3.5 W/m·K	Room temperature
Thermal Expansion Coefficients	αₓ=10.8×10⁻⁶/K, αᵧ=−8.8×10⁻⁶/K, α_z=3.4×10⁻⁶/K, 25–200 °C	25–200 °C range
Transparency Range	160–2600 nm	/
SHG Phase Matching Range	Type I: 551–2600 nm; Type II: 790–2150 nm	Room temperature
Thermo‑optic Coefficients	dnₓ/dT=−9.3×10⁻⁶/°C, dnᵧ/dT=−13.6×10⁻⁶/°C, dnz/dT=(−6.3−2.1λ)×10⁻⁶/°C	Room temperature
Absorption Coefficient	<0.1%/cm @1064 nm; <0.3%/cm @532 nm	/
Beam Divergence (Angular Acceptance)	6.54 mrad·cm (Φ, Type I, 1064 nm SHG); 15.27 mrad·cm (θ, Type II, 1064 nm SHG)	/
Temperature Bandwidth	4.7 °C·cm (Type I, 1064 nm SHG); 7.5 °C·cm (Type II, 1064 nm SHG)	/
Angular Acceptance	6.54 mrad·cm (Φ, Type I, 1064 nm SHG); 15.27 mrad·cm (θ, Type II, 1064 nm SHG)	/
Nonlinear Optical Coefficients	d₃₁=1.05±0.09 pm/V; d₃₂=−0.98±0.09 pm/V; d₃₃=0.05±0.006 pm/V	/
Sellmeier Equations (λ in μm)	nx²=2.454140+0.011249/(λ²−0.011350)−0.014591λ²−6.60×10⁻⁵λ⁴; ny²=2.539070+0.012711/(λ²−0.012523)−0.018540λ²+2.00×10⁻⁴λ⁴; nz²=2.586179+0.013099/(λ²−0.011893)−0.017968λ²−2.26×10⁻⁴λ⁴	/

LBO Crystal Specification Parameters

Item	Specific Parameter
Dimensional Tolerance	(W±0.1mm)×(H±0.1mm)×(L+0.5/-0.1mm), custom sizes accepted
Clear Aperture	95% of central region diameter
Flatness	λ/8 @ 633 nm
Transmitted Wavefront Distortion	λ/8 @ 633 nm
Surface Finish	10/5 per MIL-PRF-13830B standard
Parallelism	20 arcsec
Perpendicularity	15 arcmin
Angular Deviation	Δθ ≤ 0.1°, Δφ ≤ 0.1°
Chamfer	≤ 0.2 mm × 45°
Edge Chipping	≤ 0.1 mm
Damage Threshold	＞10 GW/cm² @ 1064 nm, 10 ns, 10 Hz (polished wafer); ＞0.5 GW/cm² @ 532 nm, 10 ns, 10 Hz (AR-coated)
Quality Guarantee Period	1 year under normal use

LBO Curve Graphs


LBO Crystal Transmittance Curve	LBO Nonlinear Crystal SHG

Type I LBO OPO Tuning Curve	Type II LBO OPO Tuning Curve

Application Fields:

1. Laser Technology Field

Frequency Doubling: Widely used for second-harmonic and third-harmonic generation of medium- and high-power 1064 nm lasers. Applicable to medical and industrial Nd:YAG lasers, as well as high-power Nd:YAG, Nd:YLF, and Nd:YVO₄ lasers for scientific and military purposes, generating green, ultraviolet, and other wavelength lasers.
Optical Parametric Amplification and Oscillation: Performs excellently in optical parametric amplifiers (OPA) and optical parametric oscillators (OPO). Through nonlinear processes, it can amplify laser signals and generate broadband tunable lasers, meeting the demands of laser imaging, spectroscopy, and laser communication, and playing an important role in laser physics experiments, spectroscopy, and laser detection.
Ultrafast Laser Technology: In ultrafast laser technology, it compresses laser pulse duration and enhances intensity through nonlinear effects, helping to produce higher-power laser pulses for materials processing, spectroscopy experiments, and nonlinear optics experiments. It can also work synergistically with laser gain media to improve the overall performance of laser systems, playing an important role in precision machining and scientific research.

2. Scientific Research Field:

It is an important material in research areas such as quantum optics and nonlinear optics. Because it enables spectral tuning from the ultraviolet to the mid-infrared range, it provides researchers with tunable light sources, facilitating in-depth study of physical phenomena such as light–matter interactions.

3. Other Fields

Fiber Communication: Can provide more stable laser output, serving as an efficient laser source for fiber optic communication systems and helping to ensure stable transmission of optical signals.

LBO