Experimental and theoretical analyses of RSOA-based colorless-ONUs with 4PAM signal in the up-link  

作　　者：展月英 张民 刘磊 刘明涛 刘卓 陈雪 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications

出　　处：《Chinese Optics Letters》2012年第9期17-21,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 61072008);the National"863" Program of China (No. 2009AA01Z255);the National "111" Program of China (No. B07005);the New Star Program of Beijing Science and Technology (No.2007A048);the Fundamental Research Funds for Central Universities (Nos. 2009GYBZ and 2009RC0401);the Program for Excellent Talents in Beijing University of Posts and Telecommunications

摘　　要：A scheme that utilizes the 4-level pulse-amplitude-modulated （4PAM） signal as the re-modulated signal of colorless optical network units （ONUs） based on reflection semiconductor optical amplifiers （RSOAs） is proposed. The system with 10-Gb/s non-return-to-zero （NRZ） downstream and 5-Gb/s 4PAM upstream signals is theoretically analyzed and experimentally verified. Simulation and experimental results reveal that the 4PAM re-modulated signal yields better performance than the NRZ signal in the upstream. A receiver power penalty of 1.6 dB is also improved by the 4PAM signal at back-to-back （BtB） transmission, whereas another receiver power penalty of 1.5 dB improved after 30-km single mode fiber transmission, where 4PAM signals are used as upstream signal.A scheme that utilizes the 4-level pulse-amplitude-modulated （4PAM） signal as the re-modulated signal of colorless optical network units （ONUs） based on reflection semiconductor optical amplifiers （RSOAs） is proposed. The system with 10-Gb/s non-return-to-zero （NRZ） downstream and 5-Gb/s 4PAM upstream signals is theoretically analyzed and experimentally verified. Simulation and experimental results reveal that the 4PAM re-modulated signal yields better performance than the NRZ signal in the upstream. A receiver power penalty of 1.6 dB is also improved by the 4PAM signal at back-to-back （BtB） transmission, whereas another receiver power penalty of 1.5 dB improved after 30-km single mode fiber transmission, where 4PAM signals are used as upstream signal.

关 键 词：Fiber optic networks Semiconductor optical amplifiers Single mode fibers 

分 类 号：TN722[电子电信—电路与系统]