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LiNbO3 Crystals

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Material Standard High Precision
Size ~20×20 mm2
Thickness 0.01~25 mm
Dimension Tolerance +/-0.1mm +/-0.01mm
Wavefront Distortion λ/4 λ/6
Surface Quality 20/10 S/D 10/5 S/D
Orientation +/-0.3° +/-0.1°
Parallelism <20 arc sec <10 arc sec
Flatness λ/4 λ/6
Coating AR Coating or P Coating


Basic Properties:

Transparency Range 420~5200nm Optical Homogeneity ~ 5 x 10-5 /cm
Refractive indices@1064nm ne=2.146, no=2.220@1300nm
ne=2.156, no=2.232@1064nm
ne=2.203, no=2.286@632.8nm
NLO Coefficients d33 = 86 x d36 (KDP)
d31 =11.6 x d36 (KDP)
d22 = 5.6 x d36 (KDP)
Effective NLO Coefficients γT33 = 32 pm/V, γS33 = 31 pm/V
γT31 =10 pm/V, γS31=8.6 pm/V
γT22 = 6.8 pm/V, γS22= 3.4 pm/V
Half-Wave Voltage, DC
Electrical field // z, light ⊥z:
Electrical field // x or y, light // z:
3.03 KV
4.02 KV
Damage Threshold 100 MW/cm2 (10ns, 1064nm)


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. Additionally 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.

Application Notes:

  • Frequency doubles
  • Optical parametric oscillators (OPO)
  • Quasi-phase-matched (QPM) device
  • Q-switches and modulator