| 摘要 |
A unitary fiber optic coupling device (10) in which N fibers (16) (N>3) extend in a parallel array having two coupling regions (11, 12) of reduced cross-sectional area. At least one of the fibers (16) is formed of two sections that are situated end-to-end, an active core-containing fiber (47) section that is situated in the first coupling region and a dummy fiber section (52) that is situated in the second coupling region. The coupler also contains at least second and third fibers that are active core-containing fibers (47) throughout their lengths. The second and third fibers couple to one another in the first coupling region but remain uncoupled to one another in the second coupling region. Two fibers that couple in the first coupling region do not couple in the second coupling region, thus avoiding resonance effects.
|
