Tosi, Mauricio (2018) Desarrollo de un receptor digital de comunicaciones ópticas para redes de acceso de alta capacidad. / Development of an optical communication receiver for high-capacity access networks. Maestría en Ingeniería, Universidad Nacional de Cuyo, Instituto Balseiro.
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Resumen en español
El desempeño de sistemas modernos de alta capacidad que utilizan la modulación DPSK (Dierential Phase Shift Keying) se ve comprometido por las imperfecciones que se presentan en la etapa de front-end del receptor. En este trabajo se analizó el impacto en el desempeño que genera el desajuste de responsividad y el desbalance temporal en el fotodetector balanceado en términos de la penalidad en la SNR comparando con el sistema DPSK ideal. Para algunos escenarios estas imperfecciones pueden comprometer la ventaja del formato DPSK frente a OOK (On-O Keying). Se demostró que en enlaces de 40 Gb/s con DPSK un retardo de 2 mm de fibra óptica genera una penalidad cercana a 3 dB y por ende el sistema deja de resultar benecioso en comparación con OOK. Frente a esta problematica se diseño un filtro ecualizador, en el dominio analógico y digital, para compensar el efecto de las imperfecciones mencionadas. El mismo fue estudiado en detalle y se verifico su funcionamiento tanto a través de simulaciones numéricas como con pruebas experimentales. Finalmente se analizó la factibilidad de implementar en el laboratorio el enlace DPSK. Para esto fue necesario el desarrollo y caracterización de las distintas etapas que componen este sistema: láser, MZM, MZI y fotodetector balanceado.
Resumen en inglés
Performance in modern, high-capacity passive optical systems with DPSK (Differential Phase Shift Keying) modulation gets compromised by imperfections in the front-end of the receiver. In this work, the impact of the responsivity mismatch and the temporal imbalance in the BPD (balanced photo-detector) were analyzed in terms of the penalty in the SNR. In some scenarios this impairments can compromise the advantage of balanced detection respect to DPSK with single-ended or OOK (On-O Keying). In 40 Gb/s-DPSK systems a delay of 2 mm in the optical paths degrades the performance around 3 dB therefore OOK is more convenient than DPSK. A digital and analog equalizer were designed and implemented in order to compensate and improve the performance of the system achieving gains higher than 2 dB by equalization.
| Tipo de objeto: | Tesis (Maestría en Ingeniería) |
|---|---|
| Información Adicional: | Realizó el trabajo en: Laboratorio de Investigaciones Aplicadas en Telecomunicaciones, Centro Atómico Bariloche. |
| Palabras Clave: | Defects; Defectos; Performance; Funcionamiento; [Imperfections; Imperfecciones; Performance; Desempeño; Equalization; Ecualización; Experimental development; Implementación experimental] |
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| Materias: | Ingeniería en telecomunicaciones > Comunicaciones ópticas |
| Divisiones: | Aplicaciones de la energía nuclear > Tecnología de materiales y dispositivos > Caracterización de materiales |
| Código ID: | 674 |
| Depositado Por: | Tamara Cárcamo |
| Depositado En: | 23 Abr 2018 12:48 |
| Última Modificación: | 24 Abr 2018 14:13 |
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