Patent ID: 6282347
Filing Date: 2001-08-28
Classification: G02B

Abstract:
An optical fiber connector comprising a first optical fiber, a first lens that converges light emitted from the first optical fiber, a second lens that converges light emitted from the first lens, and a second optical fiber that receives a convergent light beam from tine second lens, wherein, when a core diameter of the first optical fiber is given by E1, a numerical aperture thereof by NA1, a core diameter of the second optical fiber by E2, a numerical aperture thereof by NA2, a focal length of the first lens by f1, a focal length of the second lens by f2, and (E1/E2)/(f1/f2)=x is given, a connection efficiency .eta. of the first and the second optical fibers satisfies the following inequalities:(E1/E2).sup.2 <.eta..ltoreq.NA2/sin(tan.sup.-1 E1/E2.multidot.NA1/x),for0<x.ltoreq.1;(E1/E2).sup.2 <.eta..ltoreq.(1/x).sup.2.multidot.NA2/sin(tan.sup.-1 E1/E2.multidot.NA1/x),for1<x.ltoreq.E1/E2.multidot.NA1/sin(tan.sup.-1 NA2);or(E1/E2).sup.2 <.eta..ltoreq.(1/x).sup.2,forE1/E2.multidot.NA1/sin(tan.sup.-1 NA2).ltoreq.x.