Patents by Inventor Sergry Vladimir Shatalin

Sergry Vladimir Shatalin 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).

  • DETECTING A DISTURBANCE IN THE PHASE OF LIGHT PROPAGATING IN AN OPTICAL WAVEGUIDE
    Publication number: 20110199607
    Abstract: A partially coherent Optical Time Domain Reflectometry (OTDR) apparatus has a light source comprising a directly modulated semiconductor Distributed FeedBack (DFB) laser diode for transmitting partially coherent light pulses along a monomode optical fibre. Light Rayleigh backscattered from the light pulses as they travel along the optical fibre is output from the end of the fibre into which the light pulses are transmitted to a Fibre Bragg Grating (FBG) filter. The FBG filter reduces the supectral width of light received at a photodetector. In one embodiment, the supectral width of the FBG filter is around one fifth of the supectral width of the light pulse after it has travelled around 1 km along the optical fibre. As a consequence of reducing the supectral width of the light received at the photodetector, the FBG filter increases the temporal coherence of the light.
    Type: Application
    Filed: November 8, 2007
    Publication date: August 18, 2011
    Applicant: FOTECH SOLUTIONS LIMITED
    Inventors: Sotiris Emil Kanellopoulos, Sergry Vladimir Shatalin