×

Optical multiplexer-demultiplexer for use with optical fiber wavelengths

  • US 4,630,255 A
  • Filed: 12/31/1984
  • Issued: 12/16/1986
  • Est. Priority Date: 01/03/1984
  • Status: Expired due to Fees
First Claim
Patent Images

1. A wavelength multiplexer for a unidirectional link comprising a link optical fiber for transmitting an optical signal including at least three multiplexed wavelengths and having an inlet face and an outlet face and at least three intermediate optical fibers disposed adjacent the inlet face of the link fiber and each having an inlet face and an outlet face for emitting a wavelength, wherein the inlet face of the link fiber and the outlet face of the first intermediate fiber transmitting an optical signal at a first wavelength are each chamfered at a given angle and are coupled to each other in such a manner that the respective longitudinal axes of the link fiber and the first intermediate fiber are distinct, wherein the outlet face of a second intermediate fiber transmitting an optical signal at a second wavelength is coupled to the chamfered face of the first intermediate optical fiber on which a first interference filter is disposed, said filter being designed to transmit the optical signal at the first wavelength and to reflect the optical signal at the second wavelength, each of said signals being intended to penetrate into the link fiber via its chamfered face, wherein the outlet face of a third intermediate fiber transmitting an optical signal at a third wavelength is applied to the cylindrical wall of the link fiber by optical means having a refractive index matching that of each of these two fibers, and wherein a second interference filter is disposed on the chamfered face of the link fiber and is designed to transmit the optical signals at the first and second wavelengths from the output of the first filter and to reflect optical signals at the third wavelength, thereby multiplexing three wavelengths in the link fiber.

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