Digital Control of a White Light Interrogation System for Optical Fiber Interferometers

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Velosa, E (Author) Other; Gouveia, C (Author) Other; Frazao, O (Author) FCUP; Jorge, PAS (Author) FCUP; Baptista, JM (Author) Other

Journal

Title: IEEE Sensors Journal

Vol. 12

Pages: 201-206

ISSN: 1530-437X

Publisher: IEEE

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-002-HHJ

DOI: 10.1109/jsen.2011.2144579

Abstract (EN): A system to interrogate optical fiber interferometric sensors with digital control is presented. The system is based on a receiving white light Mach-Zehnder interferometer and is capable of operating with four distinct synthetic and pseudo-heterodyne signal detection schemes. A differential phase detection scheme was implemented and system performance with the different processing schemes was compared using fiber Bragg grating based Fabry-Perot cavity strain sensors. With a lock-in time constant of 1 s, most digital techniques were able to nearly match the performance of a standard hardware system, demonstrating the feasibility of low-cost high-resolution interferometric systems operated with virtual instrumentation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6