Optical communication system with multiple fiber monitoring

Details Optical communication system with multiple fiber monitoring Optical communication system with multiple fiber monitoring

1993-03-19

1994-07-12

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359167, 359173, H04J 1402

Patent

active

053293924

ABSTRACT:
An optical communication network includes a fiber-optic terminal system (FOTS) coupled to internal optical waveguides (or fibers) situated within a central office or terminal. These waveguides connect to external optical fibers. A new component is provided for optically coupling the FOTS to the waveguides. This component includes planar waveguides, referred to as "main waveguides" formed on a substrate. Each main waveguide is coupled at one end to the FOTS and at the other end to an internal waveguide. Monitor waveguides, also formed on the substrate, are used to transmit OTDR signals to the main waveguides. Wavelength-division multiplexers formed on the substrate are used to couple monitor waveguides to corresponding main waveguides with respect to monitor wavelengths but not with respect to signal wavelengths.

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T. Kitoh, et al., "Novel Broad-Band Optical Switch Using Silica-Based Planar Lightwave Circuit," IEEE Photonics Technol. Lett. 4, 1992, 735-737.

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