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A fiber optic powering data link is experimentally investigated using an optical fiber installed outside. Two optical fibers are prepared for parallel use in respect to the powering lights and for a loop structure for the signal light. High power LDs with wavelengths around 1.48μm developed for optical amplifiers are used for the powering light sources. A 1.55-μm CW light is transmitted together with the powering light from the master node and then modulated at the slave node. Stability of the system is clarified by simultaneous propagation of the 10-Gbit/s signal light and the 1.48-μm powering lights. Temperature rising induced by the optical loss near a bending point is also evaluated for practical use.

A Study of an Optical Data Link Using a Technique of Optical Fiber Power Supply through an Optical Fiber Installed Outside.