Solutions for 100/400-Gb/s Ethernet Systems Based on Multimode Photonic Technologies
In this paper, we experimentally demonstrate the transmission of 112 Gb/s four-level pulse amplitude modulation over 100-m OM4 multimode fiber employing a multimode 850-nm vertical-cavity surface-emitting laser (VCSEL) at the transmitter side and equalization techniques at the receiver's digita...
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Published in | Journal of lightwave technology Vol. 35; no. 15; pp. 3214 - 3222 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
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New York
IEEE
01.08.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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Abstract | In this paper, we experimentally demonstrate the transmission of 112 Gb/s four-level pulse amplitude modulation over 100-m OM4 multimode fiber employing a multimode 850-nm vertical-cavity surface-emitting laser (VCSEL) at the transmitter side and equalization techniques at the receiver's digital signal processing (DSP). The penalties imposed by the strong bandwidth limitations due to the optical components as well as the low modal bandwidth of the fiber are compensated by three variant DSP schemes at the receiver, i.e., 1) a finite-impulse response (FIR) filter, 2) a maximum likelihood sequence estimation equalizer (MLSE), and 3) an FIR filter followed by an MLSE equalizer (FIR/MLSE) in a cascaded form. We evaluate all three aforementioned equalization schemes under two different transmitter implementations, i.e., employing a 30-GHz arbitrary waveform generator and a lower bandwidth 15-GHz commercially available digital-to-analog converter and we infer about the applicability of each DSP scheme under these implementations. We show that the hybrid implementation of an FIR followed by a 16-state MLSE can enable the 100-m transmission below the 7% hard decision (HD) forward error correction (FEC) threshold limit and outperforms its other two counterparts for the back-to-back case as well as after 100-m transmission for the high-bandwidth transmitter implementation. On the other hand, lower bandwidth DAC implementations, i.e., 15 GHz, require an increased state MLSE without the need for a preceding FIR filter to bring the bit error rate (BER) below the HD-FEC limit after 100-m OM4 fiber transmission. DSP complexity versus BER performance is assessed for all the aforementioned scenarios evaluating the impact of the transmitter's bandwidth on the overall system's performance. Our proposed solutions show that 112 Gb/s 100-m OM4 multimode links based on VCSELs and standard OM4 fiber can enable next generation 100 and 400 Gb/s wavelength division multiplexed optical interconnects. |
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AbstractList | In this paper, we experimentally demonstrate the transmission of 112 Gb/s four-level pulse amplitude modulation over 100-m OM4 multimode fiber employing a multimode 850-nm vertical-cavity surface-emitting laser (VCSEL) at the transmitter side and equalization techniques at the receiver's digital signal processing (DSP). The penalties imposed by the strong bandwidth limitations due to the optical components as well as the low modal bandwidth of the fiber are compensated by three variant DSP schemes at the receiver, i.e., 1) a finite-impulse response (FIR) filter, 2) a maximum likelihood sequence estimation equalizer (MLSE), and 3) an FIR filter followed by an MLSE equalizer (FIR/MLSE) in a cascaded form. We evaluate all three aforementioned equalization schemes under two different transmitter implementations, i.e., employing a 30-GHz arbitrary waveform generator and a lower bandwidth 15-GHz commercially available digital-to-analog converter and we infer about the applicability of each DSP scheme under these implementations. We show that the hybrid implementation of an FIR followed by a 16-state MLSE can enable the 100-m transmission below the 7% hard decision (HD) forward error correction (FEC) threshold limit and outperforms its other two counterparts for the back-to-back case as well as after 100-m transmission for the high-bandwidth transmitter implementation. On the other hand, lower bandwidth DAC implementations, i.e., 15 GHz, require an increased state MLSE without the need for a preceding FIR filter to bring the bit error rate (BER) below the HD-FEC limit after 100-m OM4 fiber transmission. DSP complexity versus BER performance is assessed for all the aforementioned scenarios evaluating the impact of the transmitter's bandwidth on the overall syste's performance. Our proposed solutions show that 112 Gb/s 100-m OM4 multimode links based on VCSELs and standard OM4 fiber can enable next generation 100 and 400 Gb/s wavelength division multiplexed optical interconnects. In this paper, we experimentally demonstrate the transmission of 112 Gb/s four-level pulse amplitude modulation over 100-m OM4 multimode fiber employing a multimode 850-nm vertical-cavity surface-emitting laser (VCSEL) at the transmitter side and equalization techniques at the receiver's digital signal processing (DSP). The penalties imposed by the strong bandwidth limitations due to the optical components as well as the low modal bandwidth of the fiber are compensated by three variant DSP schemes at the receiver, i.e., 1) a finite-impulse response (FIR) filter, 2) a maximum likelihood sequence estimation equalizer (MLSE), and 3) an FIR filter followed by an MLSE equalizer (FIR/MLSE) in a cascaded form. We evaluate all three aforementioned equalization schemes under two different transmitter implementations, i.e., employing a 30-GHz arbitrary waveform generator and a lower bandwidth 15-GHz commercially available digital-to-analog converter and we infer about the applicability of each DSP scheme under these implementations. We show that the hybrid implementation of an FIR followed by a 16-state MLSE can enable the 100-m transmission below the 7% hard decision (HD) forward error correction (FEC) threshold limit and outperforms its other two counterparts for the back-to-back case as well as after 100-m transmission for the high-bandwidth transmitter implementation. On the other hand, lower bandwidth DAC implementations, i.e., 15 GHz, require an increased state MLSE without the need for a preceding FIR filter to bring the bit error rate (BER) below the HD-FEC limit after 100-m OM4 fiber transmission. DSP complexity versus BER performance is assessed for all the aforementioned scenarios evaluating the impact of the transmitter's bandwidth on the overall system's performance. Our proposed solutions show that 112 Gb/s 100-m OM4 multimode links based on VCSELs and standard OM4 fiber can enable next generation 100 and 400 Gb/s wavelength division multiplexed optical interconnects. |
Author | Ledentsov, Nikolay N. Prodaniuc, Cristian Stojanovic, Nebojsa Agustin, Mikel Karinou, Fotini Kropp, Jorg |
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Cites_doi | 10.1109/26.380070 10.1109/TCOM.1964.1088964 10.1002/pssc.201100315 10.1002/0470855509.ch8 10.1364/OFC.2016.Tu2G.1 10.1109/LPT.2015.2439571 10.1109/TIT.1972.1054829 10.1109/50.803016 10.1109/LPT.2013.2280726 10.1088/0268-1242/30/4/045001 10.1002/0470855509 10.1364/OFC.2016.Tu2G.4 10.1109/LED.2005.846591 |
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References | ref12 szczerba (ref9) 0 ref15 ref14 ref17 ref18 kupfer (ref24) 0 proakis (ref25) 2001 oikawa (ref6) 2007; 19 sun (ref11) 0 suhr (ref22) 0 zuo (ref13) 0 ref23 ref26 ref20 ref21 (ref1) 2016 ref27 kolesar (ref2) 2016 ingham (ref3) 2016 ref7 ref4 ref5 stojanovi? (ref19) 0 (ref16) 2004 kuchta (ref10) 0 puerta (ref8) 0 |
References_xml | – year: 0 ident: ref11 article-title: 51.56 Gb/s SWDM PAM4 transmission over next generation wide band multimode optical fiber publication-title: Proc Optical Fiber Communication contributor: fullname: sun – year: 2016 ident: ref1 – year: 0 ident: ref10 article-title: 64 Gbps transmission over 57 m MMF using an NRZ monulated 950-nm VCSEL publication-title: Proc Optical Fiber Communication contributor: fullname: kuchta – ident: ref27 doi: 10.1109/26.380070 – ident: ref20 doi: 10.1109/TCOM.1964.1088964 – ident: ref18 doi: 10.1002/pssc.201100315 – year: 0 ident: ref13 article-title: 112-Gb/s duobinary 4-PAM transmission over 200-m multi- mode fibre publication-title: Proc Eur Conf Opt Commun contributor: fullname: zuo – volume: 19 start-page: 613 year: 2007 ident: ref6 article-title: 4 × 10 Gb/s WDM transmission over a 5-km-long photonic crystal fiber in the 800-nm region contributor: fullname: oikawa – year: 2016 ident: ref2 contributor: fullname: kolesar – year: 0 ident: ref9 article-title: 70 Gbps 4-PAM and 56 Gbps 8-PAM using an 850 nm VCSEL publication-title: Proc Eur Conf Opt Commun contributor: fullname: szczerba – ident: ref14 doi: 10.1002/0470855509.ch8 – ident: ref12 doi: 10.1364/OFC.2016.Tu2G.1 – ident: ref23 doi: 10.1109/LPT.2015.2439571 – year: 2001 ident: ref25 publication-title: Digital Communications contributor: fullname: proakis – ident: ref15 doi: 10.1109/TIT.1972.1054829 – year: 0 ident: ref19 article-title: Modified gardner phase detector for nyquist coherent optical transmission systems publication-title: Proc Opt Fiber Commun contributor: fullname: stojanovi? – ident: ref21 doi: 10.1109/50.803016 – year: 0 ident: ref22 article-title: 112-Gbit/s × 4-Lane polybinary-4- PAM for 400GBase publication-title: Proc Eur Conf Opt Commun contributor: fullname: suhr – year: 2016 ident: ref3 contributor: fullname: ingham – ident: ref5 doi: 10.1109/LPT.2013.2280726 – ident: ref17 doi: 10.1088/0268-1242/30/4/045001 – ident: ref26 doi: 10.1002/0470855509 – ident: ref7 doi: 10.1364/OFC.2016.Tu2G.4 – ident: ref4 doi: 10.1109/LED.2005.846591 – year: 0 ident: ref8 article-title: 107.5 Gb/s 850 nm multi- and single-mode VCSEL transmission over 10 and 100 m of multi-mode fiber publication-title: Proc Optical Fiber Communication contributor: fullname: puerta – year: 2004 ident: ref16 – start-page: 20_ year: 0 ident: ref24 article-title: Digital equalization at 10.7 Gb/s using maximum likelihood sequence estimation-A present and future technology publication-title: Proc IEE Semin Ref No 2005-11310 Opt Fiber Commun Electron Signal Process contributor: fullname: kupfer |
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Snippet | In this paper, we experimentally demonstrate the transmission of 112 Gb/s four-level pulse amplitude modulation over 100-m OM4 multimode fiber employing a... |
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SubjectTerms | Analog to digital converters Bandwidth Bandwidths Bit error rate Complexity Digital signal processing Digital signal processors Digital to analog conversion Digital to analog converters Division Equalization Equalizers Error correction Ethernet Finite impulse response filters FIR filters Interconnections Links Maximum likelihood estimation Multiplexing Optical components Optical interconnects Optical transmitters Photonics Pulse amplitude modulation Receivers Transmitters Vertical cavity surface emission lasers Vertical cavity surface emitting lasers |
Title | Solutions for 100/400-Gb/s Ethernet Systems Based on Multimode Photonic Technologies |
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