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Core of an optical patch cord and an optical signal transmission system using the same and a method for preparing the same

  • US 7,062,139 B2
  • Filed: 11/30/2004
  • Issued: 06/13/2006
  • Est. Priority Date: 12/03/2003
  • Status: Active Grant
First Claim
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1. A core of an optical patch cord, comprising:

  • a first end with a refraction index varying in a continuous manner along the radial direction;

    a second end including a blocking region at a radial center thereof; and

    a graded region extending from the first end to a predetermined position between the first end and the second end, wherein the graded region has a refraction index distribution varying from the refraction index distribution of the first end to the refraction index distribution of the second end.

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