| 摘要 |
<p>Improved optical waveguide fiber (1) comprised of a central core (10) region surrounded by inner clad region (12). The second annular region (14) is doped with tantalum. The core (10) is doped with germanium. The first annular region (20) located between two adjacent regions of relatively high indexes of refraction. The index of refraction of both adjoining regions (10, 20) is greater than the central region (20).</p> |
