Experimental study on 25 Gbps C-band PON over up to 25 km SMF using a 10G-class DML + APD IM-DD system

• Published in: Photonics
• Main Authors: Wang H., Torres Ferrera P., Ferrero V., Gaudino R.
• Other Authors: Wang, H., Torres Ferrera, P., Ferrero, V., Gaudino, R.
• Format: Article in Journal/Newspaper
• Language: English
• Published: MDPI AG 2021
• Subjects: 10G-class DML; C-band; Chirp; Chromatic dispersion; Dispersion penalty; Frequency response; Power fading; DML
• Online Access: http://hdl.handle.net/11583/2948154; https://doi.org/10.3390/photonics8080328; https://www.mdpi.com/2304-6732/8/8/328

In this paper we present an experimental analysis of several modulation formats (pulse amplitude modulation (PAM-2), quaternary pulse amplitude modulation (PAM-4) and electrical duobinary (EDB)) for passive optical network (PON) applications at 25 Gbps bit rate in a C-band 10G-class directly modulated lasers (DML) and avalanche photodiode (APD) intensity modulation and direct detection (IM-DD) system over a single mode fiber (SMF) of up to 25 km, optimizing DML operations and demonstrating that PAM-2 is a promising choice. We also theoretically and experimentally analyzed the channel frequency response of DML and SMF affected by DML chirp and SMF chromatic dispersion.