×

Fiber optic intermode coupling single sideband frequency shifter

  • US 5,022,732 A
  • Filed: 04/25/1989
  • Issued: 06/11/1991
  • Est. Priority Date: 01/17/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for coupling optical energy between optical propagation modes in an optical fiber, comprising:

  • an optical fiber having a longitudinal axis, said optical fiber supporting a first optical propagation mode and a second optical propagation mode for an optical signal propagating therein; and

    a generator connected to said fiber such that said generator produces a flexural wave which propagates in said optical fiber, the energy of said flexural wave confined to said optical fiber, said flexural wave having a frequency, a propagation velocity and a wavelength, said wavelength of said flexural wave being a function of said frequency and said propagation velocity, and being selected to cause coupling of light from one of said modes to the other of said modes, said generator of said flexural wave having a longitudinal axis substantially coaxial with the longitudinal axis of said optical fiber.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×