CHIRAL FIBER BRAGG GRATING

摘要

A fiber Bragg grating comprises a chiral fiber (10) mimicking a cholesteric liquid crystal structure, having a first and a second helical structures (22,24) disposed along its central longitudin al axis, where the second helical structure (24) is identical in orientation to the first helical structure (22) but is shifted by one half of the structure's pitch forward. In another embodiment of the invention, only a single helical structure is disposed along the fiber to create an optically resonant chiral fiber.