Patents by Inventor Vassilios Albanis

Vassilios Albanis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fabrication of waveguides and Bragg gratings with UV-irradiation
    Patent number: 7440653
    Abstract: A method of simultaneously defining a waveguide and grating in a sample of photosensitive material comprises providing a sample of material (24) having a region which is photosensitive to light of a specific wavelength, generating a spot of light (22) at the specific wavelength, the spot having a periodic intensity pattern of high and low intensity fringes, and a width which is related to the width of the channel, positioning the spot within the photosensitive region and causing relative movement between the sample and the light spot along the desired path of the waveguide/grating define a channel of altered refractive index by exposing parts of the photosensitive region to the light spot. Modulation of the light spot to produce multiple exposures produces a grating, while continuous exposure results in a uniform waveguide. These structures can be written in straight lines or around curves, and can be accurately overwritten, so that complex optical devices can be produced in a single fabrication step.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: October 21, 2008
    Assignee: University of Southampton
    Inventors: Peter George Robin Smith, Richard Bird Williams, Vassilios Albanis, Corin Barry Edmund Gawith, Samuel Paul Watts, Gregory Daniel Emmerson
  • Fabrication of waveguides and bragg gratings with uv-irradiation
    Publication number: 20060127024
    Abstract: A method of simultaneously defining a waveguide and grating in a sample of photosensitive material comprises providing a sample of material (24) having a region which is photosensitive to light of a specific wavelength, generating a spot of light (22) at the specific wavelength, the spot having a periodic intensity pattern of high and low intensity fringes, and a width which is related to the width of the channel, positioning the spot within the photosensitive region and causing relative movement between the sample and the light spot along the desired path of the waveguide/grating define a channel of altered refractive index by exposing parts of the photosensitive region to the light spot. Modulation of the light spot to produce multiple exposures produces a grating, while continuous exposure results in a uniform waveguide. These structures can be written in straight lines or around curves, and can be accurately overwritten, so that complex optical devices can be produced in a single fabrication step.
    Type: Application
    Filed: May 19, 2003
    Publication date: June 15, 2006
    Inventors: Peter Smith, Richard Williams, Vassilios Albanis, Corin Gawith, Samuel Watts, Gregory Emmerson