Title :
Optical signal quality monitor using direct Q-factor measurement
Author :
Ohteru, Shoko ; Takachio, Noboru
Author_Institution :
NTT Opt. Network Syst. Labs., Kanagawa, Japan
Abstract :
In photonic networks, different types of signal formats such as synchronous digital hierarchy, plesiochronous digital hierarchy, and synchronous optical network are included. Therefore, an optical signal-quality monitoring scheme that is independent of the signal format is indispensable. This letter proposes a novel scheme to accomplish this. This method derives the standard deviation and the mean value of the marks/spaces rail of an eye pattern, and calculates the Q-factor. Computer simulation results confirm the applicability of the new technique.
Keywords :
Q-factor measurement; SONET; optical fibre networks; synchronous digital hierarchy; wavelength division multiplexing; direct Q-factor measurement; eye pattern; marks/spaces rail; optical signal quality monitor; photonic networks; plesiochronous digital hierarchy; signal formats; synchronous digital hierarchy; synchronous optical network; Bit error rate; Monitoring; Optical crosstalk; Optical distortion; Optical noise; Q factor; Rails; SONET; Stimulated emission; Synchronous digital hierarchy;
Journal_Title :
Photonics Technology Letters, IEEE
