Abstract: An optical signal quality monitoring system and method are provided for monitoring signal quality of a plurality of optical signals in a network. The system includes a plurality of input taps for acquiring multiple optical signals from multiple optical fibers of an optical network. The system also includes an optical switch for receiving the tapped optical signals and selecting one of the tapped optical signals at a time as an output, and an optical channel selector for selecting one signal channel at a time of the selected optical signal. The system further includes an optical signal quality measurement device for analyzing the selected optical channel of the selected optical signal and determining a signal quality of the selected optical channel.

Abstract: The present invention discloses a method for demodulating, processing and multiplexing the signals from an array of structurally integrated Bragg grating laser sensors in an optoelectronic element in order that this sensing information can be transmitted from the structure by means of a single channel and a user friendly interconnect or free-space propagation. The invention also discloses a method for determining the wavelength of narrowband optical signals such as arises from Bragg grating laser sensors and includes, for each sensor, processing the optical signal through a spectral filter with a spectral transmission function that can be accurately translated by a control parameter which has been calibrated with respective to wavelength. The filtered signal is compared to the reference signal at different values of the control parameter to determine a value of the control parameter where a predetermined relationship of the spectrally filtered signal and the reference signal is achieved.