Interferometric system controlled by virtual instrumentation for differential thermal analysis

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

Authors

Goncalves, LC (Author) Other; Gonzalez Aguilar, G (Author) Other; Baptista, JM (Author) Other; Jorge, PAS (Author) FCUP

Conference proceedings International

Title: 21ST INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS

21st International Conference on Optical Fiber Sensors

Ottawa, CANADA, MAY 15-19, 2011

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Other information

Authenticus ID: P-002-XB7

DOI: 10.1117/12.886019

Abstract (EN): This work describes the implementation of an optical fiber interferometric system for differential thermal analysis. The system is based on a white light Mach-Zehnder configuration, with serrodyne phase modulation, to interrogate two identical fiber Bragg gratings (FBG) in a differential scheme. Operation and signal processing with low cost digital instrumentation developed in Labview environment enabled FBG temperature measurement with a +/- 0.012 degrees C resolution nearly matching the performance of standard hardware. Preliminary results were obtained, where mixed samples of acetone and methanol could be successfully identified, indicating the suitability of the system for high accuracy differential thermal analysis using low cost instrumentation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4