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Project / IXOS3D

Project: In-band crosstalk in optical communications systems with differential direct detection

Acronym: IXOS3D
Main Objective:
This project is within the optical communication networks area. In particular, in the area that studies the physical constraints in optical networks.

One of the most severe limitations in the network physical layer is crosstalk. This phenomenon has its origin, primarily, in the imperfect isolation of optical components, such as optical switches, multiplexers, and demultiplexers, that are key components in the design of an optical node. The type of crosstalk that causes the higher degradation to the system performance is the in-band crosstalk, in which the interfering (crosstalk) signals and the selected signal, despite coming from distinct optical sources, have the same nominal wavelength.

The main objectives of this project are:
* Develop a formalism to evaluate the impact of in-band crosstalk in optical DQPSK systems.
* Evaluate the impact of in-band crosstalk in a DPSK and DQPSK systems when the signal propagates through an optical network. Each optical node is formed by an optical switching architecture, optical amplifiers, optical filters, and possibly wavelength converters.
* Implement Monte Carlo (MC) simulation to study the impact of ASE noise and in-band crosstalk on the performance of DPSK and DQPSK systems and confirm the analytical results.
* Implement the multicanonical Monte Carlo (MMC) method to simulate the tails of the probability density function of the decision variable and to obtain lower values of the bit error rate (BER) than in the MC standard procedure.
* Evaluate by simulation the impact of in-band crosstalk in optical networks with DPSK and DQPSK signals, for a rigorous model of the optical node and validate the analytical tool developed for this case.
Reference: -
Funding: IT/LA
Start Date: 01-05-2011
End Date: 01-05-2013
Team: Luís Gonçalo Lecoq Vences e Costa Cancela, João Lopes Rebola, João José de Oliveira Pires
Groups: Optical Communication Systems and Networking – Lx
Partners:
Local Coordinator: Luís Gonçalo Lecoq Vences e Costa Cancela
Links: Internal Page

Associated Publications
  • 1Boock Chapters
  • J. Rebola, L. Cancela, J. J. O. Pires, DQPSK Optical Networks Impaired by Multi Line Rates and Mixed Modulation Formats Interferers, Chapter in, Photooptics 2014, Springer International Publishing, Cham, 2016
  • 3Papers in Journals
  • L. Cancela, J. Rebola, J. J. O. Pires, Implications of in-band crosstalk on DQPSK signals in ROADM-based metropolitan optical networks, Optical Switching and Networking, Vol. 19, No. part 3, pp. 135 - 144, January, 2016,
    | Abstract     | BibTex
  • L. Cancela, J. J. O. Pires, On the Behaviour of Eigenfunctions and Eigenvectors in the Performance Analysis of Optical Direct Detection DPSK Receivers with Optical Amplification, Journal of Optical Communications, Vol. 34, No. 3, pp. 145 - 154, September, 2013,
    | Abstract     | BibTex
  • L. Cancela, J. J. O. Pires, Crosstalk Tolerance of Direct Detection DPSK Optical Systems in Presence of Receiver Imperfections, IET Optoelectronics, Vol. 6, No. 2, pp. 94 - 101, April, 2012,
    | Abstract     | BibTex
  • 6Papers in Conferences
  • L. Cancela, J. Rebola, J. J. O. Pires, DQPSK Error Performance in the Presence of In-Band Interferers with Different Modulation Formats, European Conf. on Networks and Optical Communications - NOC, Milão, Italy, Vol. -, pp. - - -, June, 2014,
    | Abstract     | BibTex
  • J. Rebola, L. Cancela, J. J. O. Pires, Impact of Multi-Rate and Multi-Format Crosstalk Signals on the Performance of 40 Gbit/s DQPSK Optical Receivers, INSTICC International Conf. on Photonics, Optics and Laser Technology - PHOTOPTICS, Lisbon, Portugal, Vol. 1, pp. 1 - 1, January, 2014 | BibTex
  • L. Cancela, J. Rebola, J. J. O. Pires, Analytical Assessment of the Impact of OOK Crosstalk Signals on a DPSK Direct Detection System, Conf. on Telecommunications - ConfTele, Castelo Branco, Portugal, Vol. -, pp. - - -, May, 2013,
    | Abstract     | BibTex
  • G. M. Martins, L. Cancela, J. Rebola, Monte Carlo Simulation of an Optical Differential Phase-Shift Keying Communication System with Direct Detection Impaired by In-Band Crosstalk, IARIA International Conf. on Advances on System Simulation - SIMUL, Lisbon, Portugal, Vol. -, pp. - - -, November, 2012,
    | Abstract     | BibTex
  • L. Cancela, J. Rebola, J. J. O. Pires, In-Band Crosstalk Tolerance of Direct Detection DQPSK Optical Systems, IEEE Photonics Conf. - IPC, San Francisco, United States, Vol. -, pp. - - -, September, 2012,
    | Abstract     | BibTex
  • J. Rebola, L. Cancela, J. J. O. Pires, Assessment of the Performance of DPSK Optical Direct Detection Receivers Impaired by In-Band Crosstalk – Analytical Formulation Validation, European Conf. on Networks and Optical Communications - NOC, Vilanova i la Geltru, Spain, Vol. 1, pp. 1 - 1, June, 2012 | BibTex
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