Products

DESCRIPTION

Basic Info

Specification	customized
Trademark	optu
Origin	Chengdu
HS Code	9001909090
Production Capacity	5000 Pieces / Year

Product Description

LiTaO₃ crystal belongs to 3m crystal system. The transverse electro-optic modulation of the crystal can be used to measure the electric field. LiTaO₃ has excellent electro-optic properties, it has higher electro-optic coefficient than LiNbO₃, higher optical damage threshold, lower birefringence, wide transmission band, and high light transmittance. The crystals produced by different crystal growth methods have different optical damage thresholds, the LiTaO₃ crystal prepared by top-seeded solution method is one order of magnitude higher than that of the same component crystal. As an electro-optical crystal for measuring an electric field, LiTaO₃ is widely used because of its large electro-optic coefficient, which makes it highly sensitive in measurement ,and the wafer fabrication cost is low.

Physical and Chemical Properties

Point group	C3v-3m
Refractive index at 632.8nm	n0=2.176
	ne=2.186
Transparent Range	0.4-5.0μm
Orientation	X,Z,36°Y,42°Y,128°Y
Melting point	1650ºC
Density	7.45g/cm3
Mohs hardness	5.5
Thermal expansion coefficient	aa=16×10-6/K, ac=4×10-6/K
Specific heat	0.06J/(kg•°C)
Cell Parameters	a=5.154Å,c=13.781Å
Curie Temperature	605ºC
Elastic Stiffness Coefficient	CE11=2.33(×1011N/m2)
	CE33=2.77(×1011N/m2)
Electro-optical [email protected]μm	γS13=7×10-12m/V
	γS33=30.3×10-12m/V
Heat Capacity (Cp)	100 J / k.mol

Typical Optical Properties

Electro-Optic Coefficients r(10-12 mV-1) at 632.8 nm

rT13	8.4	rS13	7
rT22	-	rS22	1
rT33	30.5	rS33	30.3
rT51	-	rS51	20

Nonlinear Optical Coefficients at 1-06 μ m (*d₃₁=d₁₅)

d22 / l d36KDP l	4.4
d31 / l d36KDP l	-2.7
d33 / l d36KDP l	-4.1

Refractive Index at 632.8 nm

no	2.1787
ne	2.1821
no: TE mode ne: TM mode

Typical Acoustic Properties

Surface Acoustic Wave Properties

Description	Propagation	Design	Surface Wave Velocity (m/s)	Coupling Coefficient k² (%)	Group Delay Time Temp Coefficient (ppm/°C)
36 ° Y - Cut	X - Axis	SSBW	4160	5	28 ~ 32
42° Y - Cut	X - Axis	SSBW	4022	7.6	40
X - Cut	112.2 Y Direction	SAW	3290	0.75	18
SAW = Surface Acoustic Wave L, SAW =Leaky SAW

Selective Piezoelectric Coupling Factors & Frequency Constants

Plate Orientation	Wave Type	Coupling Factor	Resonance Frequency Constant (MHz-mm)
X	S	0.44	1.906
Z	E	0.19	3.04
36° Y - Cut	QE	-	-
163° Y - Cut	QS	-	-
E = extensional S = shear QE = quasi - extensional QS = quasi - shear

Piezoelectric Property

Elastic stiffness coefficient cij/(1010N/m2)	c11	c12	c13	c14	c33	c44
	22.8	3.1	7.4	-1.2	27.1	9.6
piezoelectric strain constant dij/(10-11C/N)	d15	d22	d31	d33
	2.6	0.85	-0.3	0.92
dielectric constant	εT11/ε0	εT11/ε0
	53	44
Electromechanical coupling coefficient kij(%)	k15	k31
	50	50