Improvement of the SRS Effects between 1550nm optical signal for RF overlay and 1490nm optical signal for EPON downstream

1550nm 하향 RF Overlay신호와 1490nm EPON 하향 데이터 신호의 SRS영향 개선에 대한 연구

When RF overlay technology is used in EPON-based optical access network, there coexist the directly modulated 1310-nm upstream data, the directly modulated 1490-nm downstream data, and the amplitude-modulated l550-nm downstream broadcast signal based on RF overlay technology. In this paper, we analyze the spectrum of 8B/10B IDLE line code signal and the SRS effect of l490-nm IDLE line code signal on 1550-nm signal. From the result of analysis, we propose a new technique that can be used to improve the CNR of the broadcast signal, which is based on self synchronous scramble method.