Cost Effective Scheme for OLT in Next Generation Passive Optical Access Network Based on Noise Free Optical Multi Carrier  

作　　者：Rahat Ullah Bo Liu Qi Zhang Qinghua Tian Amjad Ali Yousaf Khan Feng Tian M.Azam Zia Haseeb Ahmad Lijia Zhang Xiangjun Xin 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications.Beijing University of Posts and Telecommunications,No.10 Xitucheng Road,Beijing,China,100876 [2]School of Electronic Engineering,Beijing University of Posts and Telecommunications,No.10 Xitucheng Road,Beijing,China,100876 [3]Sarhad University of Science and Information technology,Peshawar,Pakistan. [4]Electrical Engineering Department,Iqra University Peshawar,Pakistan. [5]State Key laboratory of Network and Switching Technology,Beijing University of Posts and Telecommunications,No.10 Xitucheng Road,Beijing,100876,China

出　　处：《China Communications》2016年第6期76-87,共12页中国通信（英文版）

基　　金：National High Technology 863 Program of China(No.2013AA013403,2013AA013301/02,2015AA015501/02);National NSFC(No.61425022/61307086/61475024/61275158/61201151/61275074/61205066);NITC(No.2012DFG12110);Beijing Nova Program(No.Z141101001814048);Beijing Excellent Ph.D.Thesis Guidance Foundation(No.20121001302)are gratefully acknowledged;supported by the Universities Ph.D.Special Research Funds(No.20120005110003/20120005120007);fund of State Key Laboratory of IPOC(BUPT)

摘　　要：We propos e a cos t-effective multi-carrier generation technique which minimizes the passive optical access network(PON) costs. In this study replacement of laser array with multi-carrier source at optical line terminal(OLT) side in PON is addressed. With 25-GHz frequency spacing, the generated optical multi-carriers exhibit good tone to noise ratio(TNR) i. e. above 20 d B, and least amplitude difference i. e. 1.5d B. At the OLT, multi-carriers signal based multiplexed differential phase shift keying(DPSK) data from all the channels each having 10 Gbps for downlink is transmitted through 25 km single mode fiber. While the transmitted information is retrieved at optical network unit(ONU), part of the downlink signal is re-modulated using intensity modulated(IM) on-off keying(OOK) for upstream transmission at 10-Gbps. Simulation results are in good agreement with the theoretical analysis, showing error free transmission in downlink and uplink with 10 Gbps symmetric data rate at each channel. The receivedpower, both for uplink and downlink transmission, is adequate for all channels at BER of 10-9 with minimum power penalties. Power budget is calculated for different splitting ratios showing excellent system margins for any unseen losses. The proposed setup provides a cost-effective way minimizing transmission losses, and providing greater system's margin in PON architecture.We propos e a cos t-effective multi-carrier generation technique which minimizes the passive optical access network（PON） costs. In this study replacement of laser array with multi-carrier source at optical line terminal（OLT） side in PON is addressed. With 25-GHz frequency spacing, the generated optical multi-carriers exhibit good tone to noise ratio（TNR） i. e. above 20 d B, and least amplitude difference i. e. 1.5d B. At the OLT, multi-carriers signal based multiplexed differential phase shift keying（DPSK） data from all the channels each having 10 Gbps for downlink is transmitted through 25 km single mode fiber. While the transmitted information is retrieved at optical network unit（ONU）, part of the downlink signal is re-modulated using intensity modulated（IM） on-off keying（OOK） for upstream transmission at 10-Gbps. Simulation results are in good agreement with the theoretical analysis, showing error free transmission in downlink and uplink with 10 Gbps symmetric data rate at each channel. The receivedpower, both for uplink and downlink transmission, is adequate for all channels at BER of 10-9 with minimum power penalties. Power budget is calculated for different splitting ratios showing excellent system margins for any unseen losses. The proposed setup provides a cost-effective way minimizing transmission losses, and providing greater system＇s margin in PON architecture.

关 键 词：differential phase shift keying intensity modulated on-off-keying optical frequency comb generation optical access network 

分 类 号：TN929.1[电子电信—通信与信息系统]