Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks
作者： M. Fujiwara , Jun-ichi Kani , H. Suzuki , K. Iwatsuki
关键词: Optical communication 、 Electronic engineering 、 Engineering 、 Upstream (networking) 、 Optical amplifier 、 Optics 、 Loopback 、 Transmission (telecommunications) 、 Optical modulator 、 Optical circulator 、 Wavelength-division multiplexing
摘要: This paper investigates the impact of backreflection lights on upstream transmission in wavelength division multiplexing (WDM) single-fiber loopback access networks, where a WDM light source is located at central office (CO) and each optical network unit (ONU) includes an modulator with amplifiers. study considers from two sources, continuous wave (CW) CO (Reflection-I) modulated signal ONU (Reflection-II). It confirmed, for first time, that Reflection-II increases strongly gain. To estimate these lights, simple intensity noise estimation scheme presented. clarifies acceptable line losses 10 dB 1.25 Gb/s under return loss (ORL) -32 dB.
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