UDWDM-PON Using Low-Cost Coherent Transceivers With Limited Tunability and Heuristic DWA

Sales, Vicent; Segarra, Josep; Polo, Víctor; Velasquez, J. Camilo; Prat, Josep

doi:10.1364/jocn.8.000582

Cited by 31 publications

(12 citation statements)

References 26 publications

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“…For next generation PON modulation, formats such as pulse-amplitude modulation (PAM)-4 [85,86] and QAM seem to be the most appropriate. However, it is still only a matter of research, as the costs for this technology are high [87,88]. We can also mention code division multiplexing (CDM) method for PON.…”

Section: Future Developmentmentioning

confidence: 99%

Passive Optical Networks Progress: A Tutorial

et al. 2020

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For many years, passive optical networks (PONs) have received a considerable amount of attraction regarding their potential for providing broadband connectivity to almost every citizen, especially in remote areas where fiber optics can attract people to populate regions that have been abandoned. Error-free connectivity without dropouts can offer new opportunities to communicate, earn money and enjoy cultural events. Transmission speeds are multigigabit with distances of a few tens of kilometers; these specifications were previously reserved for high-speed and long-haul backbone networks. PONs can also support a new class of applications, such as accurate time transfer or distributed fiber sensing and follow new trends in open networking. An outline of past and current standards and standards that have been proposed for the latest generation of multigigabit PONs is provided.

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Section: Future Developmentmentioning

confidence: 99%

Passive Optical Networks Progress: A Tutorial

et al. 2020

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“…Digital coherent detection involves optical coherent detection with electronic digital signal processing [1]. Coherent technology will allow the use of ultradense wavelength division multiplexing by densely spacing channels whilst avoiding filtering and introducing the 'wavelengthto-the-user' concept, thanks to the excellent selectivity of coherent receivers [15,40]. Moreover, the coherent receivers offer significantly higher receiver sensitivities compared with direct detection receivers [41,42].…”

Section: Wavelength Division Multiplexed (Wdm) Ponsmentioning

confidence: 99%

Technologies for future wavelength division multiplexing passive optical networks

El-Nahal

Hanik

2020

IET Optoelectronics

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“…Typical DFBs have a tunability ratio of ~0.1 nm / ˚C [15] covering ~3 nm (375 GHz) by ±15 ˚C temperature range, large enough to spread over many, though not all, udWDM channels. To properly manage the activation process and operation, a set of heuristic channel assignment algorithms with dynamic wavelength allocation (DWA) have been proposed to avoid collisions and efficiently organize the udWDM spectrum, lowering the blocking probability of new users connecting to the PON and satisfying network changes in environmental temperature [16].…”

Section: Coherent Transceivers Technologymentioning

confidence: 99%

Coherent Ultra-Dense WDM-PON Enabled by Complexity-Reduced Digital Transceivers

Tabares

Ghasemi

Velasquez

et al. 2020

J. Lightwave Technol.

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Coherent technologies along with digital signal processing (DSP) have revolutionized the optical communication systems, significantly increasing the capacity of the fiber channel owing to transmission of advanced modulation formats and mitigation of propagation impairments. However, the commercial solutions for high-capacity core networks are too complex and costly, then hardly feasible, for access networks with high terminal density, where cost, power budget and footprint are the main limiting factors. This article analyses the key enabling techniques to implement a complexity-reduced coherent transceiver (CoTRX) by exploiting photonic integration, simplified optical modulation, low-cost DFB lasers, consumer electronics and low-complexity DSP. Bulk optical modulators are replaced by direct amplitudeand-phase modulation of integrated electro-absorption modulated laser (EML) with smaller footprint, generating up to 8-ary modulation formats. Hardware-efficient DSP algorithms for the coherent transmitter and receiver, including pulse-shaping for direct phase modulation, differential detection for optical phase recovery, and digital pre-emphasis with enhanced tolerance to quantization noise, are investigated to face the challenges imposed by low-cost photonic and electronic devices, such as strong phase noise, wavelength drifts, severe bandwidth limitation, and low resolution data converters. Through numerical simulations and real-time experiments, the results indicate that this new class of CoTRX enables effective implementation of wavelength-to-theuser PON with dedicated 1.25 to 20 Gb/s per user, in an ultradense 6.25 to 25 GHz spaced WDM optical grid, with >30 dB loss budget, outperforming the current competing technologies for access networks.

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UDWDM-PON Using Low-Cost Coherent Transceivers With Limited Tunability and Heuristic DWA

Cited by 31 publications

References 26 publications

Passive Optical Networks Progress: A Tutorial

Passive Optical Networks Progress: A Tutorial

Technologies for future wavelength division multiplexing passive optical networks

Coherent Ultra-Dense WDM-PON Enabled by Complexity-Reduced Digital Transceivers

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