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  • LiNbO3 Crystal and MgO:LiNbO3 Crystals
  • LiNbO3 Crystal and MgO:LiNbO3 Crystals

LiNbO3 Crystal and MgO:LiNbO3 Crystals

  • Broad transparent optical range of 0.3 to 5.2 micro
  • High nonlinear coefficients and damage threshold 
  • Non-dopant LiNbO3 and MgO (0.6% to 5.0%) doped LiNbO3 available
  • Offered in blanks/laser-grade-polished/coated modules, with optional electrodes configured
  • Versatile Applications: SHG, OPO/OPA, DFM, EO Modulations, Phase-Matching, TPO (Tera-hertz Wave Parametric Oscillators), Optical Waveguides
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Specifications:

Crystal Materials

MgO:LiNbO3 Crystals (MgO doping concentration 0.6-1.0mol% or 5mol%),

LiNbO3 Crystal

Dimension Custom
Width and Height Tolerance W(+/-0.1mm) x H(+/-0.1mm) Length Tolerance +/-0.2mm
Surface Quality 20/10 S/D Parallelism <20 arc seconds
Flatness < Lambda/10 @633nm Perpendicularity <5 arc minutes
Perpendicularity <5 arc minutes Chamfer 0.2mmx45°
Lateral Surface Fine ground Orientation Tolerance < 10 arc minutes
Wavefront Distortion <Lambda/4@633nm

Lithium Niobate (LiNbO3) Crystals are an excellent NLO medium for SHG at wavelengths > 1µm, optical parametric oscillation (OPOs) pumped at 1064 nm, and quasi-phase-matching (QPM), featuring broad spectral transmission ranging from 0.4 µm to 5.0 µm with an OH- absorption at 2.87 µm, and Large nonlinear coefficients.

Compared with LiNbO3, MgO:LiNbO3 Crystal has a higher optical damage threshold, and exhibits its particular advantages for NCPM, Frequency Doubling (SHG) of Nd:Lasers, Sum Frequency Mixing (SFM), and Optical Parametric Oscillators (OPOs). The SHG efficiencies of over 65% for pulsed Nd:YAG lasers and 45% for cw Nd:YAG lasers could be gained using Shalom EO's MgO:LiNbO3 crystals. MgO:LiNbO3 is also considered an attractive candidate for Optical Parametric Amplifiers (OPAs), Quasi-Phase-Matched Doublers, and integrated Optical Waveguides.

Due to its large Electro-Optic (E-O) and Acousto-Optic (A-O) coefficients, LiNbO3 crystals are also the ideal medium for manufacturing Pockel Cells, Q-switches, Waveguide Substrates, and Surface Acoustic Wave (SAW) Wafers, etc.

Hangzhou Shalom EO provides the MgO(0.6~1.0%):LiNbO3 / MgO(5mol%):LiNbO3 and non-dopant LiNbO3 Crystals, custom crystals delivered in the form of blanks, or laser-grade-polished/coated. modules with electrodes are available upon your request.


Application Notes:

As one of the most versatile nonlinear crystals, lithium niobate has a wide range of applications, including:

1. Optical modulation and Q-switching
Due to its large electro-optic coefficients, lithium niobate is well suited to optical modulation and Q-switching of infrared wavelengths. The merits include:

  • Zero residual birefringence
  • Transverse electric field with respect to the direction of light propagation
  • Non-hygroscopic
  • Low half-wave/ quarter-wave voltage

2. Second harmonic generation, particularly for low power laser diodes between 1.3 to 1.55 µm

3. With its high nonlinear coefficients, lithium niobate is an efficient medium for optical parametric oscillation.

4. Phase-matching
lithium niobate is competent for generating tunable wavelengths over a broad wavelength range. The benefits include:

  • Broad spectral transmission ranging from 0.4 µm to 5.0 µm with an OH- absorption at 2.87 µm
  • Large negative birefringence
  • Large nonlinear coefficients

Conventional operations for 10 nanosecond pulses and 5µm beams using LiNbO3 Crystals:
1.30 mJ/pulse of 0.640 µm minus 40 mJ/pulse of 1.064 µm to produce 2.5 mJ/pulse at 1.54 µm
2.32 mJ/pulse of 0.532 µm minus 32 mJ/pulse of 0.640 µm to produce 0.25 mJ/pulse at 3.42µm

Magnesium Oxide Doped Lithium Niobate Crystals (MgO:LiNbO3)
Compared with LiNbO3 crystal, MgO:LiNbO3 crystal exhibits its particular advantages for NCPM, Frequency Doubling (SHG) of Nd:Lasers, Sum Frequency Mixing (SFM) and Optical Parametric Oscillators (OPOs). The SHG efficiencies of over 65% for pulsed Nd:YAG lasers and 45% for CW Nd:YAG lasers could be gained using Shalom EO's MgO:LiNbO3 crystals. MgO:LiNbO3 is also considered an attractive candidate for Optical Parametric Amplifiers (OPAs), Quasi-Phase-Matched Doublers, and integrated Optical Waveguides.
MgO:LiNbO3 has similar effective nonlinear coefficients to pure LiNbO3. Its Sellmeier equations are:
n²o (l) = 4.8762+0.11554/(l²-0.04674)-0.033119 x l² (λ in µm)
n²o (l) = 4.5469+0.094779/(l²-0.04439)-0.026721 x l²