The ability to transparently detect performance degradations in all-optical networks is highly desirable. We present an optical signal monitor, based on a frequency supervision system, which can participate in some tasks for fault and performance management of transparent optical networks.
Amrani, A., Junyent, G., Prat, J., Comellas, J., Ramdani, I., Sales, V., Rafel, A. Performance monitor for all-optical networks based on homodyne spectroscopy. "IEEE photonics technology letters", Novembre 2000, vol. 12, núm. 11, p. 1564-1566.