title: High-performance hybrid Raman/fiber Bragg grating fiber-optic sensor based on simplex cyclic pulse coding.
abstract: We propose and experimentally demonstrate the use of cyclic pulse coding to improve the performance of hybrid Raman/fiber Bragg grating (FBG) fiber-optic sensors, for simultaneous measurement of distributed static temperature and discrete dynamic strain over the same sensing fiber. Effective noise reduction is achieved in both Raman optical time-domain reflectometry and dynamic interrogation of time-division-multiplexed fiber FBG sensors, enhancing the sensing range resolution and providing real-time point dynamic strain measurement capabilities. The highly integrated sensor scheme employs broadband apodized low-reflectivity FBGs, a single narrowband optical source, and a shared receiver block.
authors: Scuola Superiore Sant’Anna, via G. Moruzzi 1, Pisa 56124, Italy. m.taki@sssup.it
authors: M
authors: M
authors: Taki
authors: F
authors: F
authors: Zaidi
authors: I
authors: I
authors: Toccafondo
authors: T
authors: T
authors: Nannipieri
authors: A
authors: A
authors: Signorini
authors: S
authors: S
authors: Faralli
authors: F
authors: F
authors: Di Pasquale