| 摘要 |
<p>A single mode optical fiber including a first core (300) having a constant refractive index (n1) within a predetermined radius (a1) from the center of an optical fiber, a second core (302) which covers the first core (300) and has a refractive index (n2) which decreases form the refractive index (u1) of the first core (300) with an increase in its radius, and a cladding (304) which covers the second core (302) and has a refractive index (u0) smaller than the minimum refractive index of the second core (302). Accordingly, the core structure of an optical fiber is controlled, and the optical fiber has a refractive index distribution being a complex of a staircase type having low dispersion and a triangular type having low loss, thus manufacturing an optical fiber having low dispersion and low loss.</p> |
