What Applications are Driving Higher Capacity in Access?

Miguelez, Phil

doi:10.1364/ofc.2018.m2b.1

Cited by 15 publications

(7 citation statements)

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“…T HE significant increase in the number and download speeds of mobile devices combined with new emerging mobile technologies, such as 5G and data-intensive applications (e.g., high-definition video-on-demand, online entertainment, cloud computing/storage services, the Internet of Things, and Big Data) has resulted in continuously increasing demand for bandwidth. The consumer bandwidth in residential areas and businesses is growing at a rate of nearly 50% per year [1], [2]. Eventually, it will reach multi-gigabit connection speeds per subscriber delivered via optical access networks; specifically, fibre-to-the-business/building/home/premises (FTTx) enabling high capacity and low latency connections.…”

Section: Introductionmentioning

confidence: 99%

“…Eventually, it will reach multi-gigabit connection speeds per subscriber delivered via optical access networks; specifically, fibre-to-the-business/building/home/premises (FTTx) enabling high capacity and low latency connections. Additionally, the generated data in access networks needs to be backhauled to core networks 1 , as illustrated in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

“…Optical fibre access systems based on passive optical networks (PONs) with a tree topology, i.e., using only passive components in the physical infrastructure, are widely consid- 1 The European Commission proposes to have internet access connections of download/upload speeds of ≥1 Gb/s for all schools, main public services and enterprises by 2025. Therefore, ubiquitous multi-Gb/s connectivity will be required for residential markets, and bandwidth demand for business and backhaul markets will be even exceeding by a factor of ten that of the residential markets [3].…”

Section: Introductionmentioning

confidence: 99%

“…The capacity growth in optical access networks over time. The blue markers represent the previously approved PON standards whereas red and green markers are the projections based on the consented previous standards [1], [2], [6], [9], [10]. The network capacity is estimated by the downstream speeds/user × number of users.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Low Complexity Coherent Receivers for UDWDM-PONs ($\lambda$-to-the-User)

Erkılınç

Lavery

Shi

et al. 2018

J. Lightwave Technol.

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It is predicted that demand in future optical access networks will reach multigigabit/s per user. However, the limited performance of the direct detection receiver technology currently used in the optical network units at the customers' premises restricts data rates per user. Therefore, the concept of coherentenabled access networks has attracted attention in recent years, as this technology offers high receiver sensitivity, inherent frequency selectivity, and linear field detection enabling the full compensation of linear channel impairments. However, the complexity of conventional (dual-polarization digital) coherent receivers has so far prevented their introduction into access networks. Thus, to exploit the benefits of coherent technology in access networks, low complexity coherent receivers, suitable for implementation in ONUs, are needed. In this paper, the recently proposed low complexity coherent (i.e., polarization-independent Alamouti-coding heterodyne) receiver is, for the first time, compared in terms of its minimum receiver sensitivity with five previously reported receiver designs, including a detailed discussion on their advantages and limitations. It is shown that, of all the configurations considered, the Alamouti-coding based receiver approach allows the lowest number of photons per bit (PPB) transmitted (with a lower bound of 15.5 PPB in an ideal implementation of the system), while requiring the lowest optical receiver hardware complexity (in terms of the optical component count). It also exhibits comparable complexity to the currently deployed direct-detection receivers, which typically require over 1000 PPB. Finally, a comparison of experimentally achieved receiver sensitivities and transmission distances using these receivers is presented. The highest spectral efficiency and longest transmission distance at the highest bit rate (10 Gb/s) was reported using the Alamouti-coding receiver, which is also the only one, to date, to have been demonstrated in a full system bidirectional transmission.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of Low Complexity Coherent Receivers for UDWDM-PONs ($\lambda$-to-the-User)

Erkılınç

Lavery

Shi

et al. 2018

J. Lightwave Technol.

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“…With the rapid development of the Internet services such as cloud computing, virtual reality high-resolution TV, etc., the bandwidth demand of end-users is rapidly growing [1]. To meet the demand of the end-users, the goal of nextgeneration Ethernet Passive Optical Network (NG-EPON) proposed by IEEE 802.3 is to realize 100-Gb/s capacity by stacking four or two wavelengths with each supporting 25-Gb/s or 50-Gb/s per wavelength [2].…”

Section: Introductionmentioning

confidence: 99%

A Powerful Equalizer Based on Modified SVM Classifier Without Nonlinear Kernel Enabled 100-Gb/s NG-EPON System With 10-G Class

Miao

et al. 2019

IEEE Access

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For the future high-speed next-generation Ethernet passive optical network (NG-EPON) system, the low-cost system could be kept by adopting low bandwidth devices. To compensate for the signal distortion and improve the performance of high-speed bandwidth limited system, we propose a special feature vector construction to achieve a new equalizer scheme based on support vector machines (SVM) classifier. For the first time, we mathematically analyze the model of the bandwidth-limited optical transmission system and theoretically derive the linear separability of the proposed feature vector formed linear hyperplane in 100-Gb/s NG-EPON system. Furthermore, 4×25-Gb/s non-return to zero (NRZ) and 2 × 50-Gb/s four-level pulse amplitude modulation (PAM-4) per wavelength transmission experiments with 10-G class optics system are demonstrated to prove the feasibility of our scheme. The experimental results show that, for 25-Gb/s/λ NRZ transmission, compared to the decision feedback equalizer (DFE) and feed-forward equalizer (FFE), the receiver sensitivity achieved by our scheme can be improved by about 0.5-dB @BER=3.8e-3 with limited training sequence. For the 50-Gb/s/λ PAM-4 case, the SVM-based equalization method improves the receiver sensitivity for about 1-dB. INDEX TERMS Support vector machines (SVM), non-return to zero (NRZ), pulse amplitude modulation (PAM), feature vector construction, next-generation Ethernet passive optical network (NG-EPON).

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Performance analysis of 90° hybrid for InP monolithic coherent photodetector at L-band

Han

Han²,

Wang³

et al. 2022

Optics Communications

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What Applications are Driving Higher Capacity in Access?

Cited by 15 publications

References 0 publications

Comparison of Low Complexity Coherent Receivers for UDWDM-PONs ($\lambda$-to-the-User)

Comparison of Low Complexity Coherent Receivers for UDWDM-PONs ($\lambda$-to-the-User)

A Powerful Equalizer Based on Modified SVM Classifier Without Nonlinear Kernel Enabled 100-Gb/s NG-EPON System With 10-G Class

Performance analysis of 90° hybrid for InP monolithic coherent photodetector at L-band

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