Optical signal impairment study of cascaded optical filters in 40 Gbps DQPSK and 100 Gbps PM-DQPSK systems

Chen, Xiaoyong; Rodriguez Horche, Paloma y Martín Minguez, Alfredo (2013). Optical signal impairment study of cascaded optical filters in 40 Gbps DQPSK and 100 Gbps PM-DQPSK systems. En: "Optics and Photonics for Information Processing VII", 28/08/2013 - 29/08/2013, San Diego, California, EE. UU. pp. 1-12. https://doi.org/10.1117/12.2021521.

Descripción

Título: Optical signal impairment study of cascaded optical filters in 40 Gbps DQPSK and 100 Gbps PM-DQPSK systems
Autor/es:
  • Chen, Xiaoyong
  • Rodriguez Horche, Paloma
  • Martín Minguez, Alfredo
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Optics and Photonics for Information Processing VII
Fechas del Evento: 28/08/2013 - 29/08/2013
Lugar del Evento: San Diego, California, EE. UU
Título del Libro: Proceedings of the SPIE
Fecha: 2013
Volumen: 8855
Materias:
Palabras Clave Informales: Optical filter, optical communication, differential quadrature phase shift keying (DQPSK), polarization multiplexed differential quadrature phase shift keying (PM-DQPSK), signal impairment
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Tecnología Fotónica y Bioingeniería
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Optical filters are crucial elements in optical communications. The influence of cascaded filters in the optical signal will affect the communications quality seriously. In this paper we will study and simulate the optical signal impairment caused by different kinds of filters which include Butterworth, Bessel, Fiber Bragg Grating (FBG) and Fabry-Perot (FP). Optical signal impairment is analyzed from an Eye Opening Penalty (EOP) and optical spectrum point of view. The simulation results show that when the center frequency of all filters aligns with the laser’s frequency, the Butterworth has the smallest influence to the signal while the F-P has the biggest. With a -1dB EOP, the amount of cascaded Butterworth optical filters with a bandwidth of 50 GHz is 18 in 40 Gbps NRZ-DQPSK systems and 12 in 100 Gbps PMNRZ- DQPSK systems. The value is reduced to 9 and 6 respectively for Febry-Perot optical filters. In the situation of frequency misalignment, the impairment caused by filters is more serious. Our research shows that with a frequency deviation of 5 GHz, only 12 and 9 Butterworth optical filters can be cascaded in 40 Gbps NRZ-DQPSK and 100 Gbps PM-NRZ-DQPSK systems respectively. We also study the signal impairment caused by different orders of the Butterworth filter model. Our study shows that although the higher-order has a smaller clipping effect in the transmission spectrum, it will introduce a more serious phase ripple which seriously affects the signal. Simulation result shows that the 2nd order Butterworth filter has the best performance.

Más información

ID de Registro: 36340
Identificador DC: http://oa.upm.es/36340/
Identificador OAI: oai:oa.upm.es:36340
Identificador DOI: 10.1117/12.2021521
Depositado por: Memoria Investigacion
Depositado el: 29 Jul 2015 18:58
Ultima Modificación: 29 Jul 2015 18:58
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