Enhanced Temperature Sensing with Vernier Effect on Fiber Probe based on Multimode Fabry-Perot Interferometer

• Type: Article in International Conference Proceedings Book
• Date: 2019

Authors

Gomes, AD (Author) Other; Becker, M (Author) Other; Dellith, J (Author) Other; Zibaii, MI (Author) Other; Latifi, H (Author) Other; Rothhardt, M (Author) Other; Bartelt, H (Author) Other; Frazao, O (Author) FCUP

Conference proceedings International

Title: FOURTH INTERNATIONAL CONFERENCE ON APPLICATIONS OF OPTICS AND PHOTONICS

4th International Conference on Applications of Optics and Photonics (AOP)

Univ Lisbon, Lisbon, PORTUGAL, MAY 31-JUN 04, 2019

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Other information

Authenticus ID: P-00R-8G1

DOI: 10.1117/12.2527399

Abstract (EN): Sensing at small dimensions in biological and medical environments requires miniaturized sensors with high sensitivity and measurement resolution. In this work a small optical fiber probe was developed to apply the Vernier effect, allowing for enhanced temperature sensing. Such effect is an effective way of magnifying the sensitivity of a sensor or measurement system in order to reach higher resolutions. The device is a multimode silica Fabry-Perot interferometer structured at the edge of a tapered multimode fiber by focused ion beam milling. The Vernier effect is generated from the interference between different modes in the Fabry-Perot interferometer. The sensor was characterized in temperature, achieving a sensitivity of -654 pm/degrees C in a temperature range from 30 degrees C to 120 degrees C. The Vernier effect provided a temperature sensitivity over 60-fold higher than the sensitivity of a normal silica Fabry-Perot interferometer without the effect. The temperature resolution obtained was 0.14 degrees C, however this value was limited by the resolution of the OSA and can be improved further to less than 0.015 degrees C.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5