Fiber Optic
Fiber Optic Crystals
Marketech International, Inc., a leading supplier of birefriengent crystals to the fiber optic market, has available high quality YVO4 and TiO2 (rutile) crystals. Because of its large birefringence and wide transparency range, YVO4 is an ideal choice for optical polarizing components such as fiber optic isolators, circulators, and beam displacers. Rutile or TiO2 is a more chemically resistant and physically robust crystal with a high index of refraction and large birefringence. This makes rutile suitable for beam displacers and optical isolators.
Lithium Niobate - LiNbO3
Crystals have good strength and properties for electro-optical, pyroelectric, and SAW devices. Crystal wafers have exceptional surface finishes and accurately oriented surfaces and edges, cut to standard orientations. Non linear crystals available as wafers or boules 2", 3" and 4" diameter. Applications include SAW devices, SHG and OPO.
Lithium Tantalate - LiTaO3
Crystals have good strength and properties for electro- optical, pyroelectric, and SAW devices. Crystal wafers have exceptional surface finishes and accurately oriented surfaces and edges, cut to standard orientations.
| Property/Crystal | Yttrium Vanadate | Rutile |
| Chemical Formula | YVO4 | TiO2 |
| Crystal Structure | Tetragonal | Tetragonal |
| Lattice Constants - • |
a = b = 7.12 c = 6.29 |
a = 4.5936 c = 2.9852 |
| Growth Method | Czochralski(CZ) | Vernull |
| Melting Point-°C | 1825 | 1840 |
| Density - g/cm3 | 4.22 | 4.26 |
| Harness - Mohs | 5 | 7 |
| Thermal Expansion - x 10-6/°C |
a = 4.43 c = 11.37 |
a = 7.14 c = 9.19 |
| Thermal Conductivity W/(m,k) |
a = 5.32 5.10 |
9.0 13.0 |
| Thermal Optic Coefficient Dha/dt x 10-6/°C Dhc/dt x 10-6/°C |
8.5 3.0 |
-0.72 -0.42 |
| Refractive Index @ | = 1.3mm |
ho = 1.9500 he = 2.1554 Dh = 0.2054 r = 5.72° |
no = 2.47 ne = 2.73 |
| Transmission Range - nm | 400 to 4000 | 500 to 4500 |
| Zero Dispersion Wavelength, um | 2.8 | |
| Debye Temperature, K | 760 | |
| Dielectric Constant - 104 - 107Hz | 200-160 | |
| Bandgap, eV | 3.3 |
