Provided is a tunable dispersion compensator based on an optical fiber grating for use in an optical transmission system. A tunable dispersion compensator comprises: a disk; a ring surrounding the disk, wherein the ring is rotatable independent of the disk; and a bendable plate crossing the disk and having end parts configured to move with the rotation of the ring, wherein at least one of the optical fiber grating is attached to the plate.


> Method, system and computer program product for valuating natural gas contracts using weather-based metrics

~ 00321