Single-Carrier 448 Gb/s Dual-Polarization 16-QAM Transmission over 1200 km Using Fixed Look-Up Table Based MAP Detection

Rezania, A.; Ke, Jianhong; Gao, Ying; Cartledge, J.C.

doi:10.1364/ofc.2014.th3e.4

Cited by 4 publications

(5 citation statements)

References 8 publications

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“…We demonstrate symbol rates of 128 GBd 2PAM (128 Gbit/s) with a BER below the HD-FEC limit and 128 GBd 4PAM (256 Gbit/s) and 180 GBd 2PAM (180 Gbit/s), both below the SD-FEC limit. For 180 GBd 2PAM, more advanced offline DSP was used with an additional nonlinear equalization based on a 7-symbol pattern mapping . The limited bandwidth of the AWG of around 70 GHz leads to reduced signal quality at high symbol rates.…”

Section: Resultsmentioning

confidence: 99%

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Plasmonic Modulators in Cryogenic Environment Featuring Bandwidths in Excess of 100 GHz and Reduced Plasmonic Losses

Bisang,

Horst,

Thürig

et al. 2024

ACS Photonics

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Cryogenic quantum applications have a demand for an ever-higher number of interconnects and bandwidth. Photonic links are foreseen to offer data transfer with high bandwidth, low heat load, and low noise to enable the next-generation scalable quantum computing systems. However, they require high-speed and energy-efficient modulators operating at cryogenic temperatures for electro-optic signal conversion. Here, plasmonic organic electro-optic modulators operating at 4 K are demonstrated with a >100 GHz bandwidth, drive voltages as low as 96 mV, and a significant reduction in plasmonic propagation losses by over 40% compared to room temperature. Up to 160 Gbit/s and 256 Gbit/s cryogenic electro-optic signal conversion are demonstrated by performing data experiments using a plasmonic Mach−Zehnder modulator at around 1528 nm and a plasmonic ring-resonator modulator at around 1285 nm, respectively. This work shows that plasmonic modulators are ideally suited for future high-speed, scalable, and energy-efficient photonic interconnects in cryogenic environments.

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Section: Resultsmentioning

confidence: 99%

“…For 180 GBd 2PAM, more advanced offline DSP was used with an additional nonlinear equalization based on a 7-symbol pattern mapping. 33 The limited bandwidth of the AWG of around 70 GHz leads to reduced signal quality at high symbol rates.…”

Section: ■ Device Conceptmentioning

confidence: 99%

Plasmonic Modulators in Cryogenic Environment Featuring Bandwidths in Excess of 100 GHz and Reduced Plasmonic Losses

Bisang,

Horst,

Thürig

et al. 2024

ACS Photonics

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“…Fixed LUTs based on MAP detection are used to separately mitigate the distortion of the in-phase and quadrature signals. For each polarization signal, one-dimensional MAP detection for two 4-ary signals is used rather than two-dimensional MAP detection for one 16-ary signal [26]. The LUT entries need to be updated for any change in the modulation format or symbol rate.…”

Section: Fixed Look-up Table Based Map Detectionmentioning

confidence: 99%

“…To provide a consistent comparison of the system configurations and algorithms, relative to [26] and [27] the experimental setup has been further optimized and new data captured for all the results. The fixed LUTs for the single-carrier and three-carrier signals were created using training sequence data sets comprised of 564,645 symbols in a back-to-back system configuration operating at the highest available OSNR (36.6 dB and 36.9 dB, respectively).…”

Section: A Lut Entriesmentioning

confidence: 99%

“…In particular, due to the limitations of high-speed linear amplifiers and optical modulators, modulated signals can exhibit a pattern-dependent distortion or non-linear inter-symbol interference with memory [25]. Recently, we presented the transmission performance of a 448 Gb/s single-carrier DP 16-QAM electrical time-division multiplexing (ETDM) signal using a fixed look-up table (LUT) based on maximum-aposteriori (MAP) detection with a conventional decision rule [26] and 1.206 Tb/s three-carrier DP 16-QAM superchannel ETDM signal using fixed LUT-MAP detection with a modified decision rule (referred to as minimum distance below) [27]. DP 16-QAM exhibits a high spectral efficiency and an optical signal-to-noise ratio (OSNR) sensitivity that enables longhaul transmission.…”

Section: Introductionmentioning

confidence: 99%

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Transmission Performance of 448 Gb/s Single-Carrier and 1.2 Tb/s Three-Carrier Superchannel Using Dual-Polarization 16-QAM With Fixed LUT Based MAP Detection

Rezania

Cartledge

2015

J. Lightwave Technol.

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Transmission of single-carrier 448 Gb/s dualpolarization 16-ary quadrature-amplitude-modulation (DP 16-QAM) electrical time-division multiplexing (ETDM) signal and a 1.206 Tb/s three-carrier superchannel ETDM signal using DP 16-QAM is demonstrated by applying a fixed look-up table (LUT) based on maximum-a-posteriori (MAP) detection. The MAP detector is used to mitigate the effect of pattern dependent distortion in the transmitted signal arising from the high symbol rates. Different decision rules for the MAP detector are considered based on multiple observations of the same symbol as the detection window advances through the received symbol sequence. The back-to-back optical signal-to-noise ratios for a bit error ratio of 10 −3 are 26.9 dB and 26.4 dB for the 448 Gb/s signal (12% overhead with 7% for forward error correction (FEC) coding overhead) and 1.206 Tb/s superchannel signal (20% overhead with 15% for FEC coding overhead), respectively. Compared to conventional MAP detection, a 7-symbol minimum distance MAP detector reduces the required OSNR by about 0.8 dB and 1 dB at the FEC thresholds of 3.8 × 10 −3 and 1.9 × 10 −2 for the 448 Gb/s signal and 1.206 Tb/s superchannel signal, respectively. Transmission over 1200 and 1500 km of standard single-mode fiber with EDFA amplification is achieved for the 448 Gb/s signal and 1.206 Tb/s superchannel signal, respectively.Index Terms-Quadrature amplitude modulation, maximuma-posteriori detection, superchannel 0733-8724 (c)

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1 Tbit/s three-carrier dual polarization 16-QAM superchannel transmission over 1500 km using modified fixed look-up table based MAP detection

Rezania

Gao

Cartledge

2014

2014 the European Conference on Optical Communication (ECOC)

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Single-Carrier 448 Gb/s Dual-Polarization 16-QAM Transmission over 1200 km Using Fixed Look-Up Table Based MAP Detection

Abstract: Transmission of a single-carrier 448 Gb/s dual-polarization 16-QAM signal is demonstrated using fixed look-up table based maximum-a-posteriori detection at the receiver to mitigate pattern-dependent distortion in the transmitted signal arising from the high baud rate.

Cited by 4 publications

References 8 publications

Plasmonic Modulators in Cryogenic Environment Featuring Bandwidths in Excess of 100 GHz and Reduced Plasmonic Losses

Plasmonic Modulators in Cryogenic Environment Featuring Bandwidths in Excess of 100 GHz and Reduced Plasmonic Losses

Transmission Performance of 448 Gb/s Single-Carrier and 1.2 Tb/s Three-Carrier Superchannel Using Dual-Polarization 16-QAM With Fixed LUT Based MAP Detection

1 Tbit/s three-carrier dual polarization 16-QAM superchannel transmission over 1500 km using modified fixed look-up table based MAP detection

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