Simultaneous Measurement of Partial Pressure of O-2 and CO2 using Hybrid interferometer

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

Authors

Paula A R Tafulo (Author) Other; Coelho, L (Author) Other; Jorge, PAS (Author) FCUP; Santos, JL (Author) FCUP; Kay Schuster (Author) Other; Jens Kobelke (Author) Other; Frazao, O (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

Indexing

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Scientific classification

FOS: Engineering and technology > Environmental engineering

Other information

Authenticus ID: P-002-EER

DOI: 10.1117/12.970474

Abstract (EN): In this work, a hybrid interferometer for simultaneous measurement of the partial pressures of O-2 and CO2 mixtures is reported. The sensing head consist in two different interferometers based on a Fabry-Perot cavity and a modal interference configuration. The intrinsic FP cavity was created by splicing a single mode fiber (SMF28) with a graded index fiber section that was then subjected to chemical etching creating a cavity. The second interferometer is based on a splice of a pure silica tube in series with the Fabry-Perot. Due to the design, different sensitivities are achieved for the pressure inducing refractive index changes of each gas. The rms deviations were found to be +/- 0.079 kPa and +/- 0.029 kPa for CO2 and O-2 partial pressure measurements, respectively.

Language: English

Type (Professor's evaluation): Scientific