Search Results for author: Stephan Pachnicke

Found 22 papers, 0 papers with code

Fault Monitoring in Passive Optical Networks using Machine Learning Techniques

no code implementations8 Jul 2023 Khouloud Abdelli, Carsten Tropschug, Helmut Griesser, Stephan Pachnicke

Passive optical network (PON) systems are vulnerable to a variety of failures, including fiber cuts and optical network unit (ONU) transmitter/receiver failures.

Faulty Branch Identification in Passive Optical Networks using Machine Learning

no code implementations3 Apr 2023 Khouloud Abdelli, Carsten Tropschug, Helmut Griesser, Stephan Pachnicke

In this paper, to overcome the aforementioned issues, we propose a generic ML approach trained independently of the network architecture for identifying the faulty branch in PON systems given OTDR signals for the cases of branches with close lengths.

Branch Identification in Passive Optical Networks using Machine Learning

no code implementations1 Apr 2023 Khouloud Abdelli, Carsten Tropschug, Helmut Griesser, Sander Jansen, Stephan Pachnicke

A machine learning approach for improving monitoring in passive optical networks with almost equidistant branches is proposed and experimentally validated.

Probabilistic Shaping for High-Speed Unamplified IM/DD Systems with an O-Band EML

no code implementations30 Mar 2023 Md Sabbir-Bin Hossain, Georg Bocherer, Talha Rahman, Tom Wettlin, Nebojsa Stojanovic, Stefano Calabro, Stephan Pachnicke

Probabilistic constellation shaping has been used in long-haul optically amplified coherent systems for its capability to approach the Shannon limit and realize fine rate granularity.

Machine Learning based Data Driven Diagnostic and Prognostic Approach for Laser Reliability Enhancement

no code implementations19 Mar 2022 Khouloud Abdelli, Helmut Griesser, Stephan Pachnicke

In this paper, a data-driven diagnostic and prognostic approach based on machine learning is proposed to detect laser failure modes and to predict the remaining useful life (RUL) of a laser during its operation.

BIG-bench Machine Learning

Lifetime Prediction of 1550 nm DFB Laser using Machine learning Techniques

no code implementations19 Mar 2022 Khouloud Abdelli, Danish Rafique, Helmut Griesser, Stephan Pachnicke

A novel approach based on an artificial neural network (ANN) for lifetime prediction of 1. 55 um InGaAsP MQW-DFB laser diodes is presented.

BIG-bench Machine Learning

Convolutional Neural Networks for Reflective Event Detection and Characterization in Fiber Optical Links Given Noisy OTDR Signals

no code implementations19 Mar 2022 Khouloud Abdelli, Helmut Griesser, Stephan Pachnicke

Fast and accurate fault detection and localization in fiber optic cables is extremely important to ensure the optical network survivability and reliability.

Event Detection Fault Detection

Reflective Fiber Faults Detection and Characterization Using Long-Short-Term Memory

no code implementations19 Mar 2022 Khouloud Abdelli, Helmut Griesser, Peter Ehrle, Carsten Tropschug, Stephan Pachnicke

To reduce operation-and-maintenance expenses (OPEX) and to ensure optical network survivability, optical network operators need to detect and diagnose faults in a timely manner and with high accuracy.

Multi-Task Learning

Machine Learning-based Anomaly Detection in Optical Fiber Monitoring

no code implementations19 Mar 2022 Khouloud Abdelli, JOO YEON CHO, Florian Azendorf, Helmut Griesser, Carsten Tropschug, Stephan Pachnicke

The proposed method combines an autoencoder-based anomaly detection and an attention-based bidirectional gated recurrent unit algorithm, whereby the former is used for fault detection and the latter is adopted for fault diagnosis and localization once an anomaly is detected by the autoencoder.

Anomaly Detection BIG-bench Machine Learning +1

Gated Recurrent Unit based Autoencoder for Optical Link Fault Diagnosis in Passive Optical Networks

no code implementations19 Mar 2022 Khouloud Abdelli, Florian Azendorf, Helmut Griesser, Carsten Tropschug, Stephan Pachnicke

We propose a deep learning approach based on an autoencoder for identifying and localizing fiber faults in passive optical networks.

A Hybrid CNN-LSTM Approach for Laser Remaining Useful Life Prediction

no code implementations19 Mar 2022 Khouloud Abdelli, Helmut Griesser, Stephan Pachnicke

A hybrid prognostic model based on convolutional neural networks (CNN) and long short-term memory (LSTM) is proposed to predict the laser remaining useful life (RUL).

Federated Learning Approach for Lifetime Prediction of Semiconductor Lasers

no code implementations19 Mar 2022 Khouloud Abdelli, Helmut Griesser, Stephan Pachnicke

A new privacy-preserving federated learning framework allowing laser manufacturers to collaboratively build a robust ML-based laser lifetime prediction model, is proposed.

Federated Learning Privacy Preserving

A BiLSTM-CNN based Multitask Learning Approach for Fiber Fault Diagnosis

no code implementations16 Feb 2022 Khouloud Abdelli, Helmut Griesser, Carsten Tropschug, Stephan Pachnicke

A novel multitask learning approach based on stacked bidirectional long short-term memory (BiLSTM) networks and convolutional neural networks (CNN) for detecting, locating, characterizing, and identifying fiber faults is proposed.

56 GBaud PAM-4 100 km Transmission System with Photonic Processing Schemes

no code implementations17 May 2021 Irene Estébanez, Shi Li, Janek Schwind, Ingo Fischer, Stephan Pachnicke, Apostolos Argyris

In this work, we show that the effectiveness of the internal fading memory depends significantly on the properties of the signal to be processed.

Complexity Reduction of Volterra Nonlinear Equalization for Optical Short-Reach IM/DD Systems

no code implementations29 May 2020 Tom Wettlin, Talha Rahman, Jinlong Wei, Stefano Calabrò, Nebojsa Stojanovic, Stephan Pachnicke

We show an example, in which the number of third-order kernels is halved without any appreciable performance degradation.

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