Microwave and Temperature sensor based on fiber Bragg gratings
Lima, H.
;
Nogueira, R.N.
;
Pinto, J. L.
Instituto de Telecomunicações, Universidade de Aveiro
Invention Title: Microwave and Temperature sensor based on fiber Bragg gratings
Patent Nr.: PCT/IB2010/055748
Type: Patent
Regional Coverage: PCT
Priority Date: 10-12-2010
Filing Date: 10-12-2010
Abstract
The invention presented in this paper relates to an optical fibre detector for temperature measurement and/or electromagnetic field intensity using a Bragg grating (2) in optical fibre (1), associated with a microwave radiation-sensitive material (3). The detector is obtained associating an optical fibre (1), in the region where the fibre Bragg grating (2) is written on, with a material (3) that, when absorbing radiation in the microwave range, increases in temperature, changes dimensions, or both. This detector allows the precise quantitative measurement and mapping in real time of temperature and/or microwave radiation intensity in high electromagnetic noise environments, while benefiting from the additional advantages of the use of optical fibres, such as small size and high flexibility.