Metallic-packaging fiber Bragg grating sensor based on ultrasonic welding for strain-insensitive temperature measurement

Lianqing Zhu; Runtao Yang; Yumin Zhang; Mingli Dong; Xiaoping Lou

doi:10.1063/1.5002745

Metallic-packaging fiber Bragg grating sensor based on ultrasonic welding for strain-insensitive temperature measurement

Rev Sci Instrum. 2018 Apr;89(4):045005. doi: 10.1063/1.5002745.

Authors

Lianqing Zhu¹, Runtao Yang¹, Yumin Zhang¹, Mingli Dong¹, Xiaoping Lou¹

Affiliation

¹ Beijing Engineering Research Center of Optoelectronic Information and Instrument, Beijing Key Laboratory of Optoelectronics Measurement Technology, Beijing Information Science and Technology University, Beijing 100192, China.

PMID: 29716349
DOI: 10.1063/1.5002745

Abstract

In this paper, a metallic-packaging fiber Bragg grating temperature sensor characterized by a strain insensitive design is demonstrated. The sensor is fabricated by the one-step ultrasonic welding technique using type-II fiber Bragg grating combined with an aluminum alloy substrate. Finite element analysis is used to perform theoretical evaluation. The result of the experiment illustrates that the metallic-packaging temperature sensor is insensitive to longitudinal strain. The sensor's temperature sensitivity is 36 pm/°C over the range of 50-110 °C, with the correlation coefficient (R²) being 0.999. The sensor's temporal response is 40 s at a sudden temperature change from 21 °C to 100 °C. The proposed sensor can be applied on reliable and precise temperature measurement.