Inherent EDFA cross-gain saturation functionality for 17 Gbit/s PAM-3 all-optical wavelength reuse PON  

作　　者：G.M.Isoe T.B.Gibbon 

机构地区：[1]South African Radio Astronomy Observatory(SARAO),Cape town 7925,South Africa [2]Centre for Broadband Communication,Nelson Mandela University,Port Elizabeth 6031,South Africa

出　　处：《Optoelectronics Letters》2020年第2期122-125,共4页光电子快报（英文版）

摘　　要：In this work, inherent data-erasing functionality of a saturated erbium doped fibre amplifier(EDFA) is exploited to achieve an all-optical wavelength reuse with pulse amplitude modulation(PAM) format. A 10 GHz bandwidth distributed feedback laser(DFB) is directly modulated with 17 Gbit/s PAM-3 data signal and transmitted downstream over a 26.58 km fibre optical line terminal(OLT) incurring a maximum penalty of 1.81 d B. A saturated EDFA deployed at the optical network unit(ONU) terminal is utilized to optically suppress the extinction ratio of residual 17 Gbit/s PAM-3 downstream data significantly from 7.1 d B to 830 md B. This facilitates direct reuse of the downstream carrier without the need for an additional electrical data eraser. With the all optical data erasing capability of EDFA over-10 d Bm input power, the carrier re-used upstream transmission successfully delivers 17 Gbit/s PAM-3 data with a maximum transmission penalty of 0.99 d B. PAM-3 modulation format maximizes network efficiency by doubling the transmitted bits per symbol. Our technique is all-optical, it can support ultrafast systems with higher modulation formats and is power efficient.

关 键 词：EDFA network AMPLIFIER 

分 类 号：TN929.1[电子电信—通信与信息系统]