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Coherent ultra-dense WDM-PON enabled by complexity-reduced digital transceivers

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10.1109/JLT.2019.2957882
 
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Tabares Giraldo, Jeison
Ghasemi, Saeed
Velásquez Micolta, Juan Camilo
Prat Gomà, Josep JoanMés informacióMés informacióMés informació
Tipo de documentoArtículo
Fecha de publicación2020-03-15
EditorInstitute of Electrical and Electronics Engineers (IEEE)
Condiciones de accesoAcceso abierto
Todos los derechos reservados. Esta obra está protegida por los derechos de propiedad intelectual e industrial. Sin perjuicio de las exenciones legales existentes, queda prohibida su reproducción, distribución, comunicación pública o transformación sin la autorización del titular de los derechos
ProyectoRED OPTICA DE ACCESO CON DISTRIBUCION FLEXIBLE ULTRA-DENSA DE LONGITUD DE ONDA Y ANCHO DE BANDA ELASTICO (MINECO-TEC2015-70835-R)
Resumen
Coherent technologies, along with digital signal processing (DSP), have revolutionized optical communication systems, significantly increasing the capacity of the fiber channel owing to transmission of advanced modulation formats and mitigation of propagation impairments. However, commercial solutions for high-capacity core networks are too complex and costly, and therefore hardly feasible, for access networks with high terminal density, where cost, power budget, and footprint are the main limiting factors. This article analyzes 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 amplitude-and-phase modulation of an integrated electro-absorption modulated laser (EML) with a 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-the-user PON with dedicated 1.25-20 Gb/s per user, in an ultra-dense 6.25-25 GHz spaced WDM optical grid, with >30 dB loss budget, outperforming the current competing technologies for access networks.
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© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
CitaciónTabares, Y. [et al.]. Coherent ultra-dense WDM-PON enabled by complexity-reduced digital transceivers. "Journal of lightwave technology", 15 Març 2020, vol. 38, núm. 6, p. 1305-1313. 
URIhttp://hdl.handle.net/2117/339656
DOI10.1109/JLT.2019.2957882
ISSN0733-8724
Versión del editorhttps://ieeexplore.ieee.org/document/8926465
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  • Departament de Teoria del Senyal i Comunicacions - Articles de revista [2.457]
  • GCO - Grup de Comunicacions Òptiques - Articles de revista [225]
  • Doctorat en Teoria del Senyal i Comunicacions - Articles de revista [182]
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