Impairment analysis of WDM-PON based on low-cost tunable lasers

Christoph Wagner, Michael H. Eiselt, Mirko Lawin, Shihuan Jim Zou, Klaus Grobe, Juan José Vegas Olmos, Idelfonso Tafur Monroy

Research output: Contribution to journalJournal articleResearchpeer-review


WDM-PON is considered for next-generation broadband backhaul and radio access networking. Among different implementation choices, we propose to utilize low-cost tunable lasers at the remote sites, together with a centralized wavelength locker. Practical implementations require a transparently added downstream signaling channel and upstream per-channel pilot tones for channel tagging and remote wavelength control. Together with some unavoidable crosstalk effects during tuning, all of these system-related items lead to impairments. To keep penalties below 1 dB, the modulation index of the signaling channel must be kept below 15%. Similar values result for the upstream pilot tones. In order to limit crosstalk, such systems require reduced launch power during wavelength tuning and can cover up to 40 km differential reach. These results confirm that WDM-PON based on low-cost lasers is a technically viable approach.
Original languageEnglish
JournalJournal of Lightwave Technology
Issue number22
Pages (from-to)5300-7
Publication statusPublished - 2016


  • Multiplexing and switching in optical communication
  • Metrological applications of lasers
  • Optical fibre networks
  • fault diagnosis
  • laser tuning
  • measurement by laser beam
  • optical crosstalk
  • passive optical networks
  • wavelength division multiplexing
  • low-cost tunable lasers
  • impairment analysis
  • next-generation broadband backhaul
  • access networking
  • channel tagging
  • remote wavelength control
  • modulation index
  • Modulation
  • Payloads
  • Optical network units
  • Wavelength division multiplexing
  • Optical transmitters
  • Passive optical networks
  • Tuning
  • Linear impairments
  • management channel
  • pilot tone
  • tunable laser


Dive into the research topics of 'Impairment analysis of WDM-PON based on low-cost tunable lasers'. Together they form a unique fingerprint.

Cite this