光ファイバ通信線路の瞬断が回線品質に及ぼす影響

抄録

With increased demands on optical fiber cable removing, a system which reduces circuit quality degradation caused by optical fiber switching has been strongly required. The optical switching elements and optical fiber switching systems were studied to aime at shortening optical switching time, optical loss and other optical specifications. However, the circuit quality degradation cannot be evaluated by these specifications. From this reason, the study on the circuit quality degradation caused by optical fiber switching is important and the study must comprehend the transmission system performance after optical fiber switching.
To analyze the circuit quality degradation during optical fiber switching, the standard analysis model and the optimum analysis parameters were defined. With them, the frame hunting time after optical fiber switching was theorically studied and influence on a working transmission system was estimated. The circuit degradation was evaluated experimentally as to an actual transmission system and experimental results agreed with the estimation. Moreover, by utilizing results of these studies, it was found that the reduction of circuit quality degradation can be firmly realized and concluded that the effect of these studies were verified.