Coherent ONU based on 850 μm-long cavity-RSOA for next-generation ultra-dense access network

作     者：Guang Yong Chu Adolfo Lerín Iván N.Cano Victor Polo Josep Prat 

作者机构：Department of Signal Theory and CommunicationsUniversitat Politècnica de Catalunya 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2016年第14卷第5期

页      面：19-23页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：supported by European Union’s Seventh Framework Program FP7 COCONUT Project(GA318515) the Ministry of Science and Innovation under Grant No.TEC2011-25215(ROMULA)Project TEC2015-70835(FLIPER) Project PhD fellowship donated by China Scholarship Council 

主　　题：ONU RSOA Coherent ONU based on 850 m-long cavity-RSOA for next-generation ultra-dense access network 

摘      要：In this Letter, an efficient bidirectional differential phase-shift keying （DPSK）--DPSK transmission for a ultra- dense wavelength division-multiplexed passive optical network is proposed. A single distributed feedback laser at the optical network unit （ONU） is used both as the local laser for downlink coherent detection and the optical carrier for uplink. Phase-shift keying is generated using a low-cost reflective semiconductor optical amplifier （RSOA） at the ONU. The RSOA chip has the bandwidth of 4.7 GHz at the maximum input power and bias current. For uplink transmission, the sensitivity of the RSOA chip reaches -48.2 dBm at the level of bit error rate = 10^-3 for back-to-back, and the penalty for 50 km transmission is less than 1 dB when using polarization diversity.