Simultaneous Measurement of Refractive Index and Temperature Based on Multimode Interference inside a Fiber Loop Mirror

• Type: Article in International Conference Proceedings Book
• Date: 2012

Authors

Gouveia, C (Author) Other; Chesini, G (Author) Other; Baptista, JM (Author) Other; Cordeiro, CMB (Author) Other; Jorge, PAS (Author) FCUP

Conference proceedings International

Title: 22ND INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS, PTS 1-3

22nd International Conference on Optical Fiber Sensors (OFS)

Beijing, PEOPLES R CHINA, OCT 15-19, 2012

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Other information

Authenticus ID: P-002-EEH

DOI: 10.1117/12.975281

Abstract (EN): A fiber optic sensor for simultaneous measurement of refractive index and temperature is presented. The sensing probe is achieved by introducing multimode interference inside a high birefringence fiber loop mirror resulting in a configuration capable of refractive index and temperature discrimination. The multimode interference peak is sensitive to the surrounding refractive index (90 nm/RIU) and slightly responsive to the temperature (0.005 nm/degrees C). On the other hand, the birrefringent fiber loop mirror is highly sensitive to temperature (2.39 nm/degrees C) and has no response to refractive index. Therefore, a temperature independent refractive index measurement can be made with a resolution of +/- 2.5x10(-5).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4