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

LiNbO3 Crystal and MgO:LiNbO3 Crystals

  • Broad transparent range of 0.3 to 5.2 micro
  • High nonlinear coefficients 
  • Non-doping LiNbO3 and MgO (0.6% to 5.0%) mol doping LiNbO3 available
  • High damage threshold for MgO:LiNbO3 crystals 
  • Used as SHG, OPO , DFM and TPO (Tera-hertz Wave Parametric Oscillators) applications
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Crystal Materials MgO(0.6-1.0mol% or
5mol%):LiNbO3 crystals
Size   Customized 
Size Tolerance +/-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°
Side Surface Fine ground Orientation Tolerance < 10 arc minutes
Wavefront Distortion <Lambda/4@633nm

LiNbO3 Crystal is widely used as frequency doublers for wavelength > 1µm and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Compared with pure LiNbO3, MgO:LN has higher optical damage threshold.Due to its large Electro-Optic (E-O) and Acousto-Optic (A-O) coefficients, LiNbO3 crystal is the most commonly used material for Pockel Cells, Q-switches and phase modulators, waveguide substrate, and surface acoustic wave (SAW) wafers, etc. Hangzhou Shalom EO provides the MgO(0.6~1.0mol%):LiNbO3 and MgO(5mol%):LiNbO3 crystals, the custom crystals of blanks, polished and coated and electroded is available upon your request.

Application Notes:

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

Optical modulation and Q-switching
Thanks to its large electro-optic coefficients, lithium niobate is well suited to optical modulation and Q-switching of infrared wavelengths. Among its advantages in these applications are:
1.Zero residual birefringence
2.Transverse electric field to direction of light propagation
4.Low half-wave
5.Second harmonic generation,particularly with low power laser diodes in the 1.3 to 1.55 µm range.
6.Optical parametric oscillation. With its high nonlinear coefficients, lithium niobate is an efficient medium for optical parametric oscillation.

To generate tunable wavelengths over a broad wavelength range, lithium niobate phasematching processes offer:

1.Broad spectral transmission ranging from 0.4 µm to 5.0 µm with an OH- absorption at 2.87 µm
2.Large negative birefringence
3.Large nonlinear coefficients
4.Difference frequency mixing. Lithium niobate generates tunable infrared wavelengths through a difference frequency mixing process.

Typical powers for 10 nanosecond pulses and 5-µm beams are:
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, mixing (SFG) and optical parametric oscillators (OPOs). The SHG efficiencies
of over 65% for pulsed Nd:YAG lasers and 45% for cw Nd:YAG lasers have been achieved in MgO:LiNbO3 crystals, respectively. MgO:LiNbO3 is also a good crystal for optical parametric oscillators (OPOs) and amplifiers (OPAs), quasi-phase-matched doublers and integrated waveguide.
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