Patents by Inventor Felix Paul Kapron

Felix Paul Kapron 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).

  • Optical fibre with enhanced security
    Patent number: 4070091
    Abstract: An optical fibre has a light conducting core surrounded by first and second cladding layers of sequentially lower refractive index. A data-carrying signal can be propagated in the core and a monitoring signal--of a higher modal order than the data signal--can be propagated in the core and first cladding layer. Any attempt to rap the fibre and abstract data information results in aberration of the monitor signal, which can be detected. The monitor signal can be such that resolvable signals cannot be obtained from the data channel by a tap.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: January 24, 1978
    Assignee: Northern Telecom Limited
    Inventors: John Charles Wood Taylor, Felix Paul Kapron
  • Reduction of modal and chromatic material dispersion in a multimode optical fiber
    Patent number: 4067642
    Abstract: Modal dispersion and chromatic material dispersion in a multimode optical fiber is reduced by feeding the rays of the light beam into the end of the optical fiber the angle of each ray relative to the axis of the fiber varied in accordance with the wavelength of the ray. The shortest ray is fed at a zero angle and the longest wavelength at angle of .phi. max. .phi. max. is defined by the equation ##EQU1##This invention relates to the reduction of both modal and chromatic material dispersion in a multimode optical fibre.Multimode guides are currently used in fibre-bundle optical communications and will also appear in the next generation of individual-fibre systems. Their 50 to 100.mu.m diameter cores are compatible with multimode LED sources and simple connecting and tapping techniques.
    Type: Grant
    Filed: August 3, 1976
    Date of Patent: January 10, 1978
    Assignee: Northern Telecom Limited
    Inventors: Frederick David King, Felix Paul Kapron
  • Equalization of chromatic pulse dispersion in optical fibres
    Patent number: 3988614
    Abstract: The chromatic pulse dispersion of a light beam in an optical fibre can be equalized by dispersing the light beam into a spectrum, detecting different portions of the spectrum and producing signals related to each portion, applying different time delays to the signals and then combining the signals to provide an output. The spectrum can be divided into discrete portions having a range of wavelengths, with optical delay lines, optical filters, and multiple section photodetectors used. The spectrum can be formed on one surface of a PIN diode, having the I layer of a thickness which varies along the length, giving in effect division of the spectrum into an infinite number of portions.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: October 26, 1976
    Assignee: Northern Electric Company Limited
    Inventors: Felix Paul Kapron, John Charles Wood Taylor