OPTICAL SIGNAL TO NOISE MONITOR

摘要

An optical noise monitoring method and monitor, the monitor (10) has an optical element (16) for receiving at least a portion of an optical signal. The optical element (16) can scatter the optical signal by stimulated Brillouin scattering. A device (14) is arranged to extract a reflected optical signal comprising a portion of the optical signal back-reflected by stimulated Brillouin scattering in the optical element (16), and a photodetector (18) for receiving the reflected optical signal.