DPSK signals demodulation based on a multimode fiber with a central dip

Chen, Xiaoyong and Rodriguez Horche, Paloma and Martín Minguez, Alfredo (2014). DPSK signals demodulation based on a multimode fiber with a central dip. In: "19th European Conference on Networks and Optical Communications (NOC 2014)", 04/06/2014 - 06/06/2014, Milano, Italy. pp. 18-22. https://doi.org/10.1109/NOC.2014.6996821.

Description

Title: DPSK signals demodulation based on a multimode fiber with a central dip
Author/s:
  • Chen, Xiaoyong
  • Rodriguez Horche, Paloma
  • Martín Minguez, Alfredo
Item Type: Presentation at Congress or Conference (Article)
Event Title: 19th European Conference on Networks and Optical Communications (NOC 2014)
Event Dates: 04/06/2014 - 06/06/2014
Event Location: Milano, Italy
Title of Book: 19th European Conference on Networks and Optical Communications (NOC 2014)
Date: 2014
Subjects:
Freetext Keywords: Optical communication; differential phase shift keying; modal interference; optical reciever
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica y Bioingeniería
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Differential Phase Shift Keying (DPSK) modulation format has been shown as a robust solution for next-generation optical transmission systems. One key device enabling such systems is a delay interferometer, converting the phase modulation signal into the intensity modulation signal to be detected by the photodiodes. Usually, a standard Mach-Zehnder interferometer (MZI) is used for demodulating a DPSK signal. In this paper, we develop an MZI which is based on all-fiber Multimode Interference (MI) structure: a multimode fiber (MMF) with a central dip, located between two single-mode fibers (SMFs) without any transition zones. The MI based MZI (MI-MZI) is more stable than the standard MZI as the two arms share the same MMF, reducing the impact of the external effects, such as temperature and others. Performance of this MI-MZI is analyzed theoretically and experimentally from transmission spectrum. Experimental results shows that high interference extinction ratio is obtained, which is far higher than that obtained from a normal graded-index based MI-MZI. Finally, by software simulation, we demonstrate that our proposed MI-MZI can be used for demodulating a 40 Gbps DPSK signal. The performance of the MI-MZI based DPSK receiver is analyzed from the sensitivity. Simulation results show that sensitivity of the proposed receiver is about -22.3 dBm for a BER of 10-15 and about -23.8 dBm for a BER of 10-9.

More information

Item ID: 36649
DC Identifier: http://oa.upm.es/36649/
OAI Identifier: oai:oa.upm.es:36649
DOI: 10.1109/NOC.2014.6996821
Deposited by: Memoria Investigacion
Deposited on: 25 Jul 2015 08:45
Last Modified: 25 Jul 2015 08:45
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