Comparative analysis of wavelength-multiplexed photonic-sensor networks using fused biconical WDMS

• Type: Article in International Scientific Journal
• Date: 2003

Authors

Abad, S (Author) Other; Araujo, FM (Author) Other; Ferreira, LA (Author) Other; Santos, JL (Author) FCUP; Lopez Amo, M (Author) Other

Journal

Title: IEEE Sensors Journal

Vol. 3

Pages: 475-483

ISSN: 1530-437X

Publisher: IEEE

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 5 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-000-FPQ

DOI: 10.1109/jsen.2003.815806

Abstract (EN): Three networks based on fused biconical wavelength division multiplexers (WDMs) and fiber Bragg gratings (FBGs) are theoretically and experimentally demonstrated for photonic-intensity-sensor multiplexing. The aim of replacing standard couplers for WDMs in the power division process is to reduce power losses and improve the robustness of the systems to FBG wavelength shifts. The different network topologies are analyzed both in terms of power budget and crosstalk noise, considering the multiplexing of two fiber-taper displacement sensors. The configuration with one detector for each sensor and the corresponding FBG at the detection end is proven to be the best topology in terms of crosstalk, doubling the peak-isolation value of the WDMs employed and yielding a 37.4-dB optical signal-to-noise ratio for a two-sensor network. Regarding power losses, the optimum configuration locates the FBGs at the sensor heads, thus improving power budget and avoiding additional couplers at the detectors. Both topologies are expanded to multiplex four sensors, being crosstalk identified as the critical factor in these networks. With this limiting parameter, the first configuration has been determined as the most suitable for multiplexing a high number of sensors.

Language: English

Type (Professor's evaluation): Scientific