Advanced DSP-based Monitoring for Spatially resolved and Wavelength-dependent Amplifier Gain Estimation and Fault Location in C+L-band Systems


The development of efficient anomaly detection schemes is a key element for the implementation of autonomous optical networks as they can help telecom operators to automate the location of defective devices and track the overall performance of the network infrastructure. In that regard, the exploitation of receiver based digital signal processing (DSP) for optical performance monitoring has shown to be a promising enabler for detection of spatially resolved and wavelength-dependent properties and anomalies in optical fiber links. In this work, we study the benefits of applying DSP-based longitudinal power estimation on multiple wavelength division multiplexing (WDM) channels allocated in the optical grid to infer wavelength-wise characteristics of a C+L-band optical line system. In that context, we show that the applied scheme can successfully recreate a visualization of the spatial evolution of the gain tilt imposed by in-line optical amplifiers. Additionally, we propose the utilization of advanced DSP tools based on wavelet-denoising to enhance the performance of an anomaly detection approach. The proposed method not only can improve accuracy of the fault location, by reducing positioning uncertainty, but it also delivers more uniform readings of the anomaly signatures.

Publication DOI:
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Electrical and Electronic Engineering
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see
Uncontrolled Keywords: C+L-band,Monitoring,Optical fiber amplifiers,Optical filters,Optical performance monitoring,Optical polarization,Personal protective equipment,Tomography,Wavelength division multiplexing,anomaly detection,digital signal processing,fiber nonlinearity,Atomic and Molecular Physics, and Optics
Publication ISSN: 0733-8724
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Related URLs: https://ieeexpl ... ocument/9896153 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2023-02-01
Published Online Date: 2022-09-20
Accepted Date: 2022-09-10
Authors: Sena, Matheus
Hazarika, Pratim (ORCID Profile 0000-0003-2515-9782)
Santos, Caio
Correia, Bruno
Emmerich, Robert
Shariati, Behnam
Napoli, Antonio
Curri, Vittorio
Forysiak, Wladek (ORCID Profile 0000-0001-5411-1193)
Schubert, Colja
Fischer, Johannes K.
Freund, Ronald



Version: Accepted Version

Access Restriction: Restricted to Repository staff only

License: Creative Commons Attribution


Version: Published Version

License: Creative Commons Attribution

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