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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editor: Richard A. Linke
  • Vol. 4, Iss. 4 — Apr. 4, 2005
  • pp: 191–204

Optical-carrier-frequency detection using a synchroscan disk-shaped optical filter embedded in bidirectional fiber delay line for superdense WDM network systems

Yoshitada Katagiri, Hiroshi Tamura, and Kazuo Aida  »View Author Affiliations

Journal of Optical Networking, Vol. 4, Issue 4, pp. 191-204 (2005)

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We propose and demonstrate a method of detecting the optical carrier frequency of an optical data stream using a disk-shaped wavelength-tunable optical bandpass filter operated in the synchroscan mode. The method is based on a differential technique that uses an S-shaped curve obtained from divided data streams. A bidirectional configuration with a delay line enables the data streams not only to pass through the filter at a different time but also to enter each photodiode at the same time. Consequently, pattern-oriented noise, which degrades the accuracy, can be eliminated by an optimized low-pass filter. An experimental demonstration carried out for optical signals with a non-return-to-zero format 2^7 - 1 pattern at 150 Mbit/s verifies the method. A high resolution of 100 MHz is achieved with a filter having a transmission bandwidth of 0.06 nm. This performance is promising for photonic networks that manage a large number of optical channels multiplexed in the frequency domain.

© 2004 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(120.2440) Instrumentation, measurement, and metrology : Filters
(120.4640) Instrumentation, measurement, and metrology : Optical instruments

ToC Category:

Original Manuscript: December 6, 2004
Revised Manuscript: December 4, 2004
Published: March 31, 2005

Yoshitada Katagiri, Hiroshi Tamura, and Kazuo Aida, "Optical-carrier-frequency detection using a synchroscan disk-shaped optical filter embedded in bidirectional fiber delay line for superdense WDM network systems," J. Opt. Netw. 4, 191-204 (2005)

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