Higher order mode dispersion compensating fiber and mode converter for higher order fiber

摘要

A higher order mode dispersion compensating fiber (43) includes an optical fiber and a loss layer (5) which is provided within the fiber and which attenuates a lower order mode propagating through the optical fiber but does not attenuate a higher order mode which is higher than the lower order mode. A dispersion compensating fiber mode converter for a higher order fiber (41) includes a single mode fiber (42); a higher order mode dispersion compensating fiber (43); and a fused and extended portion which has been formed by fusing and extending the single mode fiber (42) and the higher order mode fiber, wherein the fused and extended portion converts between the LP01 mode of the single mode fiber (42) and the LP02 mode of the higher order mode dispersion compensating fiber (43).