×

High resolution optical multiplexing and demultiplexing device in optical communication system

  • US 5,917,625 A
  • Filed: 02/21/1997
  • Issued: 06/29/1999
  • Est. Priority Date: 09/09/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. An optical multiplexing and demultiplexing device comprising:

  • a waveguide array for entering optical signals to be multiplexed/demultiplexed, in a layered structure with a waveguide layer formed by silica glass and having a plurality of waveguide channels for propagating the optical signals, adjacent waveguide channels being separated by an etching groove formed therebetween in the waveguide layer, and means provided in at least a part of the etching grooves formed among the waveguide channels for preventing optical coupling among the waveguide channels;

    a lens for collimating the optical signals from the waveguide array and the multiplexed/demultiplexed optical signals to the waveguide array; and

    a diffraction grating for diffracting the optical signals entered by the waveguide array and collimated by the lens to obtain wavelength division multiplexed/demultiplexed optical signals.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×