<p><a href="http://www.osa-jon.org/features/OPM_2004.html">Feature Issue on Optical Performance Monitoring (OPM)</a></p> We report on the pilot-tone-based optical performance monitoring techniques for use in the wavelength-division multiplexing (WDM) network. We first described the operating principle of the pilot-tone-based monitoring technique and estimated its scalability by analyzing potential problems. We then reviewed the techniques proposed for monitoring various optical parameters of WDM signals--such as optical power, wavelength, optical path, and cross talk--using pilot tones. We also presented examples of various network elements using the pilot-tone-based monitoring technique. In addition, we reviewed the pilot-tone-based monitoring techniques used in adaptive compensators for chromatic dispersion and polarization-mode dispersion, and we discussed their limitations and possible solutions. For example, we demonstrated a simple technique for monitoring the chromatic dispersion and polarization-mode dispersion simultaneously, without their affecting each other, by scrambling the state of polarization of the optical signal.
© 2003 Optical Society of America
Optical Performance Monitoring
Original Manuscript: December 1, 2003
Revised Manuscript: November 29, 2003
Published: June 14, 2004
Optical Performance Monitoring (2004) Journal of Optical Networking
H. Ji, K. Park, J. Lee, H. Chung, E. Son, K. Han, S. Jun, and Y. Chung, "Optical performance monitoring techniques based on pilot tones for WDM network applications," J. Opt. Netw. 3, 510-533 (2004)