| 摘要 |
<p>A plastic optical fiber comprising a first core, a second core concentrically disposed on the outer periphery thereof and having a refractive index different from that of the first core, and a clad concentrically disposed on the outer periphery of the second core, characterized in that a ratio X (r1/r2) of the first core's radius r1 to the second core's radius r2, and a ratio Y (n2/n1) of the refractive index difference n2 between the second core and the clad to the refractive index difference n1 between the first core and the clad satisfy the following inequalities Y≥-1.134X+1.0518 (1), X≤-1.4842Y2+1.1097Y+0.7097 (2), and come within a range (excluding X=0.8 and Y=0.35, and X=0.8 and Y=0.45) satisfying Y<0.4 or X≥0.76, whereby providing a plastic optical fiber having a large transmission power and a wide band.</p> |
