| Patent Number |
Title Of Patent |
Date Issued |
| 7515801 |
Coherent terahertz radiation source |
April 7, 2009 |
| A THz radiation source comprising a dual waveguide heterostructure is provided. The dual waveguide heterostructure includes an optical waveguide contained within a larger THz waveguide layered structure. The radiation source provides a coherent guided wave of THz radiation which is g |
| 6951120 |
Machining of lithium niobate by laser ablation |
October 4, 2005 |
| Machining of crystalline lithium niobate is carried out utilizing a laser having a beam with a wavelength near the absorption edge of lithium niobate. The laser beam is provided in pulses of short duration and at a repetition rate selected to ablate the surface of the lithium niobate |
| 6846428 |
Thin film lithium niobate and method of producing the same |
January 25, 2005 |
| Metal oxide films such as lithium niobate are formed in an amorphous state on a substrate such as lithium niobate and can be readily etched by conventional liquid or dry etchants. The amorphous film may then be converted by annealing to a crystalline form well suited to formation of |
| 6545791 |
Electro-optic optical elements |
April 8, 2003 |
| Electro-optic elements are formed in metal oxide films, such as lithium niobate, on a substrate such as lithium niobate for utilization in electro-optical devices. The electro-optic elements include trenches in the lithium niobate selected to improve the performance of the device. Tr |
| 6433919 |
Method and apparatus for wavelength conversion and switching |
August 13, 2002 |
| A two-dimensional second order nonlinear lattice formed in a lattice body is utilized for performing a one-step optical carrier wavelength interchange between pairs of input optical signals. The lattice body includes sensitized regions arranged in a two-dimensional array in a matrix |
| 5227913 |
Co-deposition of erbium and titanium into lithium niobate and optical amplifier produced thereby |
July 13, 1993 |
| Er and Ti are co-diffused under controlled conditions into a single crystal of LiNbO.sub.3. The co-diffusion is used to produce a light amplifier in LiNbO.sub.3 that is suitable for use in integrated optic devices. |
| 5020872 |
Method of operating an electrooptic modulator |
June 4, 1991 |
| An electrooptic directional coupler having first and second electrodes for influencing coupling between a segment of a first optical waveguide and a segment of a second optical waveguide, is operated by varying the potential of the first electrode relative to the second electrode during |
| 4997245 |
Polarization independent optical switches |
March 5, 1991 |
| An electrooptical device comprises a substrate of electrooptic material having first, second and third optical waveguide formed therein. The first and second waveguides have first and second waveguide segments respectively, and the third waveguide has third and fourth waveguide segme |
| 4968112 |
Apparatus for providing depolarized light |
November 6, 1990 |
| Apparatus for depolarizing light received from a source of light comprises a body of material that defines an optical waveguide, the material of the body and the length of the waveguide being such that when polarized light is propagated through the waveguide, light in one of two polariza |
