Monitoring of OSNR by using a Mach-Zehnder interferometer

Journal ar
Microwave and Optical Technology Letters
  • Volumen: 30
  • Número: 1
  • Fecha: 05 July 2001
  • Páginas: 63-65
  • ISSN: 08952477
  • Source Type: Journal
  • DOI: 10.1002/mop.1221
  • Document Type: Article
We introduce a novel technique to monitor the optical signal-to-noise ratio (OSNR) using a Mach-Zehnder interferometer. The error of the novel method is less than 0.5 dB when the OSNR is between 10 and 40 dB in the best working case. In practice, the dynamic range reduces to 10-30 dB because of the influence of polarization, crosstalk, and signal bit rate. The key advantage of this method is its low cost.

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