15-dB differential link-loss UDWDM-PON with direct beat phase modulated DFBs

• Published in: IEEE Photonics Technology Letters
• Main Authors: Velásquez Micolta, Juan Camilo, Cano Valadez, Iván Nicolás, Polo Querol, Víctor, Domingo Ribé, Marc, Prat Gomà, Josep Joan
• Other Authors: Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. GCO - Grup de Comunicacions Òptiques
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2017
• Subjects: Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica; Optical fibers; Laser communication systems; Optical fiber detectors; Beat phase modulation; Coherent detection; DFB; Directly modulated laser (DML); Optical amplifiers; Optical attenuators; Optical filters; Optical sensors; Passive optical networks; Stimulated emission; UDWDM-PON; Fibres òptiques; Sistemes de comunicació per làser; Detectors de fibra òptica; DML
• Online Access: http://hdl.handle.net/2117/115440; https://doi.org/10.1109/LPT.2017.2776738

©2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. IEEE A 15 dB differential link-loss ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) with two optical network units (ONU) spectrally spaced 6.25 GHz is experimentally implemented and tested. The ONU transmitters consist of direct phase modulated distributed feedback lasers (DFB) through a digital beat signal, whose amplitude and duty cycle are optimized for maximum phase variations, avoiding the need for an analogue equalizer. We achieved receiver sensitivities of -53 dBm, -50.5 dBm, and -45 dBm for bit rates of 1.25 Gb/s, 2.5 Gb/s, and 5 Gb/s respectively at BER = 4·10 -3 with an intradyne coherent receiver. Peer Reviewed Postprint (author's final draft)