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Optical fiber cable apparatus having encased ribbon stack

  • US 6,778,745 B2
  • Filed: 08/23/2001
  • Issued: 08/17/2004
  • Est. Priority Date: 08/23/2001
  • Status: Expired due to Term
First Claim
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1. An optical cable, substantially without a central strength member, the optical cable comprising:

  • at least one multi-fiber unit tube dimensioned to receive a plurality of optical fibers, the unit tube being substantially circular and having an inner diameter (D), wherein the modulus of the at least one multi-fiber unit tube is less than 70,000 psi;

    a stacked plurality of optical fiber ribbons positioned within the multi-fiber unit tube, the stacked plurality of optical fiber ribbons having a diagonal length (d), wherein the ratio of the diagonal length (d) of the stacked plurality of optical fiber ribbons to the inner diameter (D) of the multi-fiber unit tube is at least 0.90; and

    a filling material disposed between the stacked plurality of optical fiber ribbons and the multi-fiber unit tube.

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