Optical performance monitoring in high-speed optical fiber communication systems

Changyuan Yu, Jing Yang, Junhao Hu, Banghong Zhang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Optical performance monitoring (OPM) becomes an attractive topic as the rapid growth of data rate in optical communication networks. It provides improved operation of the high capacity optical transmission systems. Among the various impairments, chromatic dispersion (CD) is one of major factors limiting the transmission distance in high-speed communication systems. Polarization-mode dispersion (PMD) also becomes a degrading effect in the system with data rate larger than 40 Gbit/s. In this paper, we summarize several CD and PMD monitoring methods based on RF spectrum analysis and delay-tap sampling. By using a narrow band fiber Bragg grating (FBG) notch filter, centered at 10 GHz away from the optical carrier, 10-GHz RF power can be used as a CD-insensitive PMD monitoring signal. By taking the 10-GHz RF power ratio of non-filtered and filtered signal, PMD-insensitive CD monitoring can be achieved. If the FBG notch filter is placed at optical carrier, the RF clock power ratio between non-filtered and filtered signal is also a PMDinsensitive CD monitoring parameter, which has larger RF power dynamic range and better measurement resolution. Both simulation and experiment results show that the proposed methods are efficient on measuring CD and PMD values in 57-Gbit/s D8PSK systems. Delay-tap sampling is another efficient method of measuring residual CD. Amplitude ratio of asynchronous delay-tap sampling plot decreases with CD monotonously, and the amplitude ratio can be obtained by using low bandwidth balanced receiver. The simulated results show that our method is efficient on residual CD measurement in 50-Gbit/s 50% RZ DQPSK systems with a 12-GHz balanced receiver. Since no modification on the transmitter or receiver is required, the proposed scheme is simple and cost effective.
Original languageEnglish
Title of host publicationPhotonics and Optolectronics Meetings (POEM) 2011
Subtitle of host publicationOptical Communication Systems and Networking
Publication statusPublished - 11 May 2012
Externally publishedYes
EventPhotonics and Optolectronics Meetings (POEM) 2011: Optical Communication Systems and Networking - Wuhan, China
Duration: 2 Nov 20115 Nov 2011


ConferencePhotonics and Optolectronics Meetings (POEM) 2011: Optical Communication Systems and Networking


  • Chromatic dispersion (CD)
  • Fiber bragg grating (FBG)
  • Optical communications
  • Optical performance monitoring (OPM)
  • Polarization-mode dispersion (PMD)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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