Tellurium Dioxide (TeO2) Crystals for Acousto-Optic Modulators

TeO2 is a kind of acousto-optic material with high quality factor. It has good properties of birefringence and optical rotation with low velocity of propagation along (110) axis.Under the same clear aperture, the acousto-optic device produced by TeO2 crystals has the advantages of the orders of magnitude improvement in resolution, fast response speed, small driving power, high diffraction efficiency, as well as stable and reliable performance.
TeO2 crystals are ideal single crystal material used to produce different kinds of acousto-optic device, such as acousto-optic deflector, modulator, resonator and tunable filter.
 

TeO2 crystals can be used to produce kinds of acousto-optic device, such as acousto-optic deflector, acousto-optic Q-switched and SAWD. Thus, these crystals are widely used in lidar, the scanning of TV and large screen's displayer, the optical memory of photon computer and laser communication.

We can provide 2inch, 3inch 4inch TeO2 ingots and all specs of wafers,bars, and blocks. Any of your questions and comments are warmly welcome.
 

TeO2, Colorless synthetic single crystal, grown from melt with Czochralski method

Symmetry: Tetragonal, 422 (D4)
Lattice distances: a = 4.8122 A; c = 7.6157 A
Molecular weight: 159.5
Density, g/cm3: 5.99 ± 0.03
Melting point: 733 0С
Hardness: 3 - 4 Moh's hardness scale
Thermal expansion, ·10-6 К-1: α11 = 17.7; α22 = 17.7; α33 = 5.5
Transmission: 0.35 - 5.0 μm

Refractive indexes:
λ, μm		no			ne			Δn = ne - no
0.4047		2.4315			2.6167			0.1852
0.4358		2.3834			2.5583			0.1749
0.4678		2.3478			2.5164			0.1686
0.4800		2.3366			2.5036			0.1670
0.5086		2.3150			2.4779			0.1629
0.5461		2.2931			2.4520			0.1589
0.5893		2.2738			2.4295			0.1557
0.6328		2.2597			2.4119			0.1522
0.6438		2.2562			2.4086			0.1524
0.690		2.2450			2.3955			0.1505
0.800		2.226			2.373			0.147
1.00		2.208			2.352			0.144
Optical activity, along [001]:
λ, μm		p, deg/mm			λ, μm			p, deg/mm
0.3698		587.1			0.5893			104.9
0.3783		520.6			0.6328			86.9
0.3917		437.4			0.700			67.4
0.4152		337.6			0.800			48.5
0.4382		271.0			0.900			37.4
0.4630		221.1			1.00			29.5
0.4995		171.2			1.10			23.8
0.5300		143.4
Dielectric permittivity: ε11 = 22.9; ε33 = 24.7 Elastic constants, ·10-10 N/m2: c11=5.57; c33=10.58; c44=2.65; c66=6.59; c12=5.12; c13=2.18 Photoelasticity coefficients: λ = 0.6328 μm p11=0.0074; p12=0.187; p13=0.340; p31=0.0905; p33= 0.240; p44= - 0.17; p66= - 0.0463 Acoustooptical properties: λ = 0.6328 μm
Nsound	Usound		Vsound, ·103 м/с	Nlight		Elight	M1, ·10-7см2· с/г		M2, ·10-18с3/г
[100]	[100]		2.98	[010]		[100]	0.097		0.048
[100]	[100]		-	[010]		[001]	22.9		10.6
[001]	[001]		4.26	[010]		[100]	142		34.5
[001]	[001]		-	[010]		[001]	113		25.6
[100]	[010]		3.04	[001]		optional	3.70		1.76
[110]	[110]		4.21	[-110]		[110]	323		0.802
[110]	[110]		-	[-110]		[001]	16.2		3.77
[101]	[101]		3.64	[-101]		[010]	101		33.4
[010]	[010]		2.98	[-101]		[101]	42.6		20.4
[110]	[-110]		0.617	[001]		optional	68.6		793
[101]	[-101]		2.08	[010]		[100]	76.4		77

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