ADJUSTABLE DISPERSION COMPENSATOR WITH FEW MODE FIBERS AND SWITCHABLE MODE CONVERTERS

摘要

2 or more modes of propagation properties of the selected mode on the base can be adjusted in the dispersion compensators are available . The basic device structure is at least one higher order mode (HOM; higher-order-mode) includes one or more optical fiber section, as well as to support the fundamental mode. They are connected to each other by a converter (MC) - HOM fiber spatial mode are switchable. MC, for example, long-period fiber-gratings (LPG), coupled waveguide devices, free-space phase-retardation elements, micro-electro-mechanical devices, or acousto-optical couplers may be made. MC is assembled so as to convert any incoming spatial mode into one of any other guided mode of the HOM fiber. Strain (strain), the temperature, by an electro-optic or non-linear optical effect, or change any other physical effect that changes the refractive index of the optical material used to construct the MC, the switching is achieved.