OSNR monitoring for higher order modulation formats using asynchronous amplitude histogram

Thomas Shun Rong Shen, Pak Tao Lau, Gordon Ning Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)


We propose an asynchronous-amplitude-histogram-based optical signal-to-noise ratio monitoring technique for higher order modulation formats. Simulation results show that the proposed technique enables a wide monitoring range for 25-GSym/s nonreturn-to-zero/return-to-zero 16- and 64-quadrature amplitude modulation systems with high monitoring sensitivity. The tolerance of the monitoring technique to other signal impairments such as chromatic dispersion and polarization-mode dispersion is also investigated. The proposed technique can be used along transmission links with simple low-cost hardware and/or in digital signal processing (DSP)-based coherent receivers without additional hardware, thus enabling next-generation optical networks using higher order modulation formats to achieve transmission rates of 100 Gb/s per channel and beyond.
Original languageEnglish
Article number5565409
Pages (from-to)1632-1634
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number22
Publication statusPublished - 1 Nov 2010


  • Asynchronous amplitude histogram (AAH)
  • optical performance monitoring (OPM)
  • optical signal-to-noise ratio (OSNR)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials


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