ProductsOptical CrystalBirefringent CrystalLiNbO3

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LiNbO3

LiNbO Crystal is widely used as frequency doublers for wavelength > 1 m and optical parametric oscillators (OPOs) pumped at 1064nm as well as quasi-phase-matched (QPM) devices. Due to its large Electro-Optic ((E-O) and Acousto-Optic (A-O) coefficient, LiNbO crystal is the most commonly used material for Pockel Cells, Q-switches and phase modulators, waveguide substrate, and surface acoustic wave (SAW) wafers, etc.

Crystal Structure	Trigonal, space group R 3c
Cell Parameters	a = 0.515, c = 13.863, Z = 6
Melting Point	1255 +/-5℃
Curie Point	1140 +/-5℃
Mohs Hardness	5
Density	4.64 g/cm 3
Absorption Coefficient	~ 0.1%/cm @ 1064 nm
Solubility:	insoluble in H 2 O
Relative Dielectric Constant	ε T11/ε 0 : 85
	ε T33/ε 0 : 29.5
Thermal Expansion Coefficients at 25℃	||a, 2.0 x 10 -6 /K @ 25℃
	||c, 2.2 x 10 -6 /K @ 25℃
Thermal Conductivity	38 W /m /K @ 25℃
Transparency Range	420 - 5200 nm
Refractive Indices	n e = 2.146, n o = 2.220 @ 1300 nm
	n e = 2.156, n o = 2.322 @ 1064 nm
	n e = 2.203, n o = 2.286 @ 632.8 m
Optical Homogeneity	~ 5 x 10 -5 /cm
Sellmeier Equations( l in mm)	n o 2 (l) = 4.9048+0.11768/(l2- 0.04750) - 0.027169l2
	n e 2 (l) = 4.5820+0.099169/( l2 - 0.04443) - 0.021950 l2
NLO Coefficients	d 33 = 34.4 pm/V
	d 31 = d 15 = 5.95 pm/V
	d 22 = 3.07 pm/V
Electro-Optic Coefficients	γT 33 = 32 pm/V, γS 33 = 31 pm/V
	γ T 31 = 10 pm/V, γ S 31 = 8.6 pm/V
	γ T 22 = 6.8 pm/V, γS 22 = 3.4 pm/V,
Half-Wave Voltage, DC	3.03 KV  4.02 KV
Electrical field ||z, light ^ z:
Electrical field ||x or y, light || z:
Damage Threshold	200 MW/cm 2 (10 ns)
Efficiency NLO Coefficients	d eff =5.7pm/V or~14.6xd 36 (KDP) for frequency doubling 1300 nm;
	d eff =5.3pm/V or~13.6xd 36 (KDP) for OPO pumped at 1064nm;
	d eff =17.6pm/V or~45xd 36 (KDP) for quasi-phase-matched structure;

Flatness	λ/8 @ 632.8nm
Wavefront distortion	<λ/4@ 632.8nm
Surface quality	10/5 per MIL-O-13830A
Parallelism	10″
Perpendicularity	5′
Bevel/chamfer	<0.1mm@45deg.
Chips	<0.1mm
Angle Tolerance	△θ≤±0.5°, △φ≤±0.5°
Coating	AR/P- coating Upon request