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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 8 — Apr. 13, 2009
  • pp: 6696–6702

Simultaneous WDM signal detection realized by ultrafast field sampling

Keiji Okamoto and Fumihiko Ito  »View Author Affiliations

Optics Express, Vol. 17, Issue 8, pp. 6696-6702 (2009)

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This paper proposes a novel detection technique for wavelength-division multiplexing (WDM) signals that uses the ultrafast field sampling approach. The proposed technique simultaneously samples the total field of the WDM signal with no wavelength-demultiplexing; its electrical post-processing provides a filtering function in the digital domain. As a result, the individual fields of the WDM channels, including mutual phase relationship, can be jointly reconstructed. As a preliminary demonstration, the simultaneous monitoring of a WDM signal composed of two channels with independent polarization states, is successfully performed using a dual-channel field sampling system with polarization diversity. This demonstration can be expanded to the detection of a WDM signal with N channels by using an N-channel field sampling system. It is also experimentally-verified that the reconstructed fields preserve the mutual phase relationship of the original fields. This ‘field sensitive’ WDM detection may open new possibilities for advanced WDM monitoring systems and even the electrical compensation of linear and/or non-linear inter-channel cross-talk in digital coherent detection systems.

© 2009 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 7, 2009
Revised Manuscript: April 2, 2009
Manuscript Accepted: April 2, 2009
Published: April 8, 2009

Keiji Okamoto and Fumihiko Ito, "Simultaneous WDM signal detection realized by ultrafast field sampling," Opt. Express 17, 6696-6702 (2009)

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