Optics-simplified DSP for 50 Gb/s PON downstream transmission using 10 Gb/s optical devices
Directly-modulated laser (DML) is widely employed in intensity modulation and direct detection (IMDD) system due to its low cost and high output power. However, the corresponding frequency chirp is regarded as one of the main disadvantages for its application in passive optical networks (PONs). In t...
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ftchalmersuniv:oai:research.chalmers.se:515619 2023-07-30T04:03:11+02:00 Optics-simplified DSP for 50 Gb/s PON downstream transmission using 10 Gb/s optical devices Xue, Lei Yi, Lilin Hu, Weisheng Lin, Rui Chen, Jiajia 2020 text https://doi.org/10.1109/JLT.2019.2942438 https://research.chalmers.se/en/publication/b2aa62b5-c257-438b-961d-7806ffca3ac9 unknown http://dx.doi.org/10.1109/JLT.2019.2942438 https://research.chalmers.se/en/publication/b2aa62b5-c257-438b-961d-7806ffca3ac9 Telecommunications Atom and Molecular Physics and Optics Condensed Matter Physics Directly modulated laser (DML) Digital signal processing(DSP) Dispersion-supported equalization (DSE) Passive optical network (PON) Direct detection 2020 ftchalmersuniv https://doi.org/10.1109/JLT.2019.2942438 2023-07-12T22:36:19Z Directly-modulated laser (DML) is widely employed in intensity modulation and direct detection (IMDD) system due to its low cost and high output power. However, the corresponding frequency chirp is regarded as one of the main disadvantages for its application in passive optical networks (PONs). In this paper, we theoretically analyze the frequency response evolution of DML based system under different chirp and dispersion conditions, proving that the system bandwidth can be improved by interactions between negative dispersion and DML chirp. Based on this concept, we experimentally demonstrated downstream 50 Gb/s PAM4 signal transmission over 20 km single-mode fiber (SMF) access based on the 10 Gb/s DML operating at 1310 nm and avalanche photodiode (APD). A dispersion-shifted fiber (DSF) providing -150 ps/nm dispersion at 1310 nm in the optical line terminal (OLT) is used to pre-equalize the frequency response of bandwidth-limited directly modulated signals in the optical domain. Thanks to our proposed dispersion-supported equalization (DSE) technique, the system bandwidth can be improved by 5 GHz. Feed-forward equalization (FFE), decision feedback equalization (DFE) and Volterra filter are employed to evaluate the signal performance improvement, respectively. By evaluating the receiver sensitivity, the DSE combined with FFE scheme shows 2 dB improvement than the complex Volterra algorithm, indicating its potential to reduce the complexity of digital signal processing (DSP) and therefore a lower cost and power consumption in PON. Other/Unknown Material DML Chalmers University of Technology: Chalmers research Journal of Lightwave Technology 38 3 583 589 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Telecommunications Atom and Molecular Physics and Optics Condensed Matter Physics Directly modulated laser (DML) Digital signal processing(DSP) Dispersion-supported equalization (DSE) Passive optical network (PON) Direct detection |
spellingShingle |
Telecommunications Atom and Molecular Physics and Optics Condensed Matter Physics Directly modulated laser (DML) Digital signal processing(DSP) Dispersion-supported equalization (DSE) Passive optical network (PON) Direct detection Xue, Lei Yi, Lilin Hu, Weisheng Lin, Rui Chen, Jiajia Optics-simplified DSP for 50 Gb/s PON downstream transmission using 10 Gb/s optical devices |
topic_facet |
Telecommunications Atom and Molecular Physics and Optics Condensed Matter Physics Directly modulated laser (DML) Digital signal processing(DSP) Dispersion-supported equalization (DSE) Passive optical network (PON) Direct detection |
description |
Directly-modulated laser (DML) is widely employed in intensity modulation and direct detection (IMDD) system due to its low cost and high output power. However, the corresponding frequency chirp is regarded as one of the main disadvantages for its application in passive optical networks (PONs). In this paper, we theoretically analyze the frequency response evolution of DML based system under different chirp and dispersion conditions, proving that the system bandwidth can be improved by interactions between negative dispersion and DML chirp. Based on this concept, we experimentally demonstrated downstream 50 Gb/s PAM4 signal transmission over 20 km single-mode fiber (SMF) access based on the 10 Gb/s DML operating at 1310 nm and avalanche photodiode (APD). A dispersion-shifted fiber (DSF) providing -150 ps/nm dispersion at 1310 nm in the optical line terminal (OLT) is used to pre-equalize the frequency response of bandwidth-limited directly modulated signals in the optical domain. Thanks to our proposed dispersion-supported equalization (DSE) technique, the system bandwidth can be improved by 5 GHz. Feed-forward equalization (FFE), decision feedback equalization (DFE) and Volterra filter are employed to evaluate the signal performance improvement, respectively. By evaluating the receiver sensitivity, the DSE combined with FFE scheme shows 2 dB improvement than the complex Volterra algorithm, indicating its potential to reduce the complexity of digital signal processing (DSP) and therefore a lower cost and power consumption in PON. |
author |
Xue, Lei Yi, Lilin Hu, Weisheng Lin, Rui Chen, Jiajia |
author_facet |
Xue, Lei Yi, Lilin Hu, Weisheng Lin, Rui Chen, Jiajia |
author_sort |
Xue, Lei |
title |
Optics-simplified DSP for 50 Gb/s PON downstream transmission using 10 Gb/s optical devices |
title_short |
Optics-simplified DSP for 50 Gb/s PON downstream transmission using 10 Gb/s optical devices |
title_full |
Optics-simplified DSP for 50 Gb/s PON downstream transmission using 10 Gb/s optical devices |
title_fullStr |
Optics-simplified DSP for 50 Gb/s PON downstream transmission using 10 Gb/s optical devices |
title_full_unstemmed |
Optics-simplified DSP for 50 Gb/s PON downstream transmission using 10 Gb/s optical devices |
title_sort |
optics-simplified dsp for 50 gb/s pon downstream transmission using 10 gb/s optical devices |
publishDate |
2020 |
url |
https://doi.org/10.1109/JLT.2019.2942438 https://research.chalmers.se/en/publication/b2aa62b5-c257-438b-961d-7806ffca3ac9 |
genre |
DML |
genre_facet |
DML |
op_relation |
http://dx.doi.org/10.1109/JLT.2019.2942438 https://research.chalmers.se/en/publication/b2aa62b5-c257-438b-961d-7806ffca3ac9 |
op_doi |
https://doi.org/10.1109/JLT.2019.2942438 |
container_title |
Journal of Lightwave Technology |
container_volume |
38 |
container_issue |
3 |
container_start_page |
583 |
op_container_end_page |
589 |
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1772814124749684736 |