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Optical fiber coupler of improved signal distribution characteristics

  • US 5,175,782 A
  • Filed: 11/16/1990
  • Issued: 12/29/1992
  • Est. Priority Date: 11/16/1990
  • Status: Expired due to Fees
First Claim
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1. A coupler comprising:

  • a central in put optical fiber radically surrounded uniformly by N number of fibers, output optical fibers of the N number of fibers having optical cores uniformly surrounded by optical cladding, the N number of fibers having radii "r" of the central optical fiber is determined by the equation;

    
    
    space="preserve" listing-type="equation">R=(r)(1-sin θ

    /sin θ

    wherein θ

    is 360°

    /2N, and the central optical fiber and the N number of fibers being optically fused together radially along an optical coupling length corresponding to that coupling length along which optical power transmitted by the central optical fiber is coupled completely and distributed uniformly radially to the output optical fibers having the optical cores proportionately spaced the same from an optical core of the central optical fiber.

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