A Simple Interrogation Technique for Refractive Index Measurement using Multimode Interference Structure

• Type: Article in International Conference Proceedings Book
• Date: 2011

Authors

Susana Silva (Author) FCUP; Frazao, O (Author) FCUP; Santos, JL (Author) FCUP; Malcata, FX (Author) Other

Conference proceedings International

Title: International Conference on Applications of Optics and Photonics

International Conference on Applications of Optics and Photonics

Braga, Portugal, 3 a 7 de Maio de 2011

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Scientific classification

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

Other information

Authenticus ID: P-002-X97

DOI: 10.1117/12.890150

Abstract (EN): A simple interrogation technique for refractive index measurement is proposed, using a multimode interference-based fiber tip structure. The fiber probe is a section of a multimode fiber, spliced to a single-mode fiber and interrogated in reflection. The interrogation technique uses two fiber Bragg gratings as discrete optical sources; by means of relative intensity variation of the reflected signals, those sources will provide a measurement of refractive index changes, while taking advantage of the MMI-based fiber tip. The read-out system uses a WDM and two photodetectors to separate both signals. A sensitivity of -5.87/RIU, in the refractive index range 1.30-1.38, was achieved with the proposed configuration.

Language: English

Type (Professor's evaluation): Scientific