光ファイバによる周波数標準の高精度供給システム

概要

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A precise frequency dissemination system using optical fiber is studied. The purpose of the system is to transmit frequency standard with little deterioration to distant many users. It is composed of a phase compensation transmitter, bidirectional optical amplifiers, optical amplified distributor, and receiver. The system target is to achieve a stable transmission of hydrogen maser class signals. For short term stability, it is shown the required optical received power to realize the Allan deviation of 1×10-13 (averaging time of 1 s). For long term stability, a new compensation method using third wavelength transmission is effective to suppress phase fluctuation induced by fiber temperature change. Experimental result shows stability of 8×10-17 at 105 s in a fiber link of 160 km in total with one bidirectional optical amplifier.
社団法人電気学会の論文