Single-VCSEL 100-Gb/s Short-Reach System Using Discrete Multi-Tone Modulation and Direct Detection

Xie, Chongjin; Dong, Po; Randel, Sebastian; Pilori, Dario; Winzer, Peter J.; Spiga, Silvia; Kögel, Benjamin; Neumeyr, Christian; Amann, Markus‐Christian

doi:10.1364/ofc.2015.tu2h.2

Cited by 66 publications

(37 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, DMT has been used to maximize capacities of bandwidth limited intensity modulated direct detected (IM-DD) systems [25,[34][35][36]. DMT is a type of OFDM with real-valued output signals that can be easily detected with inexpensive direct detection receivers.…”

Section: Figure 1 Wavelength Division Multiplexed Passive Optical Nementioning

confidence: 99%

Bit- and Power-Loading—A Comparative Study on Maximizing the Capacity of RSOA Based Colorless DMT Transmitters

et al. 2017

View full text Add to dashboard Cite

Abstract:We present a comparative study of the capacity increase brought by bit-and power-loading discrete multi-tone (DMT) modulation for low-cost colorless transmitters. Three interesting reflective semiconductor optical amplifier (RSOA) based colorless transmitter configurations are compared: First, an amplified spontaneous emission (ASE) spectrum-sliced source; second, a self-seeded RSOA fiber cavity laser (FCL) and third, an externally seeded RSOA. With bit-and power-loaded DMT, we report record high line rates of 6.25, 20.1 and 30.7 Gbit/s and line rates of 4.17, 10.1 and 24.5 Gbit/s in a back-to-back and in a 25 km nonzero dispersion shifted fiber (NZDSF) transmission experiments for the three transmitter configurations, respectively. In all the experiments, BER (bit error ratios) below an FEC (forward error correction) limit of 7.5 × 10 −3 were achieved.

show abstract

Section: Figure 1 Wavelength Division Multiplexed Passive Optical Nementioning

confidence: 99%

Bit- and Power-Loading—A Comparative Study on Maximizing the Capacity of RSOA Based Colorless DMT Transmitters

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Research has been performed on MCF connectors to enable practical implementations [6]. A few recent works [7] [8] and [9] on high data rate transmission with 1.5-µm SM-VCSELs have also shown promising results towards the combination of a VCSEL with a MCF for different modulation formats. This paper is an invited extension of our work presented at OFC 2018 [10].…”

Section: Introductionmentioning

confidence: 99%

High-Speed PAM4-Based Optical SDM Interconnects With Directly Modulated Long-Wavelength VCSEL

Kerrebrouck

Pang

Ozoliņš

et al. 2019

J. Lightwave Technol.

Self Cite

View full text Add to dashboard Cite

This paper reports the demonstration of high-speed PAM-4 transmission using a 1.5-µm single-mode vertical cavity surface emitting laser (SM-VCSEL) over multicore fiber with 7 cores over different distances. We have successfully generated up to 70 Gbaud 4-level pulse amplitude modulation (PAM-4) signals with a VCSEL in optical back-to-back, and transmitted 50 Gbaud PAM-4 signals over both 1-km dispersion-uncompensated and 10-km dispersion-compensated in each core, enabling a total data throughput of 700 Gbps over the 7-core fiber. Moreover, 56 Gbaud PAM-4 over 1-km has also been shown, whereby unfortunately not all cores provide the required 3.8 × 10 −3 bit error rate (BER) for the 7% overhead-hard decision forward error correction (7% OH-HDFEC). The limited bandwidth of the VCSEL and the adverse chromatic dispersion of the fiber are suppressed with pre-equalization based on accurate end-to-end channel characterizations. With a digital post-equalization, BER performance below the 7% OH-HDFEC limit is achieved over all cores. The demonstrated results show a great potential to realize high-capacity and compact short-reach optical interconnects for data centers.

show abstract

“…For the modulation format, non-return to zero (NRZ) would be the simplest solution, requiring however expensive high-bandwidth optics and electronics. Hence, advanced modulation formats combined with DSP and FEC-encoding are considered, with potential candidates being PAM4 [7], [8], [9], duobinary/partial response PAM4 (PR PAM4) [10], [11], [12], DMT [13], [14] and carrier-less amplitude and phase modulation (CAP) [15]. Out of these, PAM4 and DMT have also been heavily discussed during the standardization activities of the IEEE802.3bs 400 GbE Task Force for next generation of intra-data center interconnects [16], resulting already in demonstrations of 100G real-time PHYs and offer good opportunities for reuse [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of 112-Gb/s DMT, Nyquist PAM4, and Partial-Response PAM4 for Future 5G Ethernet-Based Fronthaul Architecture

Eiselt

Muench

Dochhan

et al. 2018

J. Lightwave Technol.

View full text Add to dashboard Cite

For a future 5G Ethernet-based fronthaul architecture, 100G trunk lines of a transmission distance up to 10 km standard single mode fiber (SSMF) in combination with cheap grey optics to daisy chain cell site network interfaces are a promising cost-and power-efficient solution. For such a scenario, different intensity modulation and direct detect (IMDD) formats at a data rate of 112 Gb/s, namely Nyquist four-level pulse amplitude modulation (PAM4), discrete multi-tone transmission (DMT) and partial-response (PR) PAM4 are experimentally investigated, using a low-cost electro-absorption modulated laser (EML), a 25G driver and current state-of-the-art high speed 84 GS/s CMOS digital-to-analog converter (DAC) and analogto-digital converter (ADC) test chips. Each modulation format is optimized independently for the desired scenario and their digital signal processing (DSP) requirements are investigated. The performance of Nyquist PAM4 and PR PAM4 depend very much on the efficiency of pre-and post-equalization. We show the necessity for at least 11 FFE-taps for pre-emphasis and up to 41 FFE coefficients at the receiver side. In addition, PR PAM4 requires an MLSE with four states to decode the signal back to a PAM4 signal. On the contrary, bit-and power-loading (BL, PL) is crucial for DMT and an FFT length of at least 512 is necessary. With optimized parameters, all modulation formats result in a very similar performances, demonstrating a transmission distance of up to 10 km over SSMF with bit error rates (BERs) below a FEC threshold of 4.4E-3, allowing error free transmission.

show abstract

Single-VCSEL 100-Gb/s Short-Reach System Using Discrete Multi-Tone Modulation and Direct Detection

Cited by 66 publications

References 4 publications

Bit- and Power-Loading—A Comparative Study on Maximizing the Capacity of RSOA Based Colorless DMT Transmitters

Bit- and Power-Loading—A Comparative Study on Maximizing the Capacity of RSOA Based Colorless DMT Transmitters

High-Speed PAM4-Based Optical SDM Interconnects With Directly Modulated Long-Wavelength VCSEL

Performance Comparison of 112-Gb/s DMT, Nyquist PAM4, and Partial-Response PAM4 for Future 5G Ethernet-Based Fronthaul Architecture

Contact Info

Product

Resources

About