Transparent network for hybrid multiplexing of fiber Bragg gratings and intensity-modulated fiber-optic sensors.
A network for multiplexing fiber Bragg gratings (FBGs) and intensity-modulated fiber-optic sensors with no need to distinguish between the two kinds of sensor is proposed and experimentally demonstrated. Two FBG sensors and two intensity-modulated sensors are wavelength-division multiplexed; the electrical phase of the output signal is measured as a common parameter for both types of sensor. Furthermore, the intensity sensors become power referenced, and the FBG sensors are interrogated by a low-cost technique. Low cross talk is achieved by use of a tunable optical filter at the detector.
Abad
Silvia
S
Departamento Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, Campus de Arrosadia, s/n-E31006, Pamplona, Spain. sabad@multiwavenetworks.com
Araújo
Francisco M
FM
Ferreira
Luis Alberto
LA
Santos
José Luís
JL
López-Amo
Manuel
M