Novel micro nano fiber Bragg grating refractive index sensor

• Main Authors: LONG JUNQIU, XU ZHIYUAN, RAN YANG, GUAN BAI'OU
• Format: Patent
• Language: Chinese; English
• Published: 03.09.2019
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; TARIFF METERING APPARATUS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

The invention discloses a novel micro nano fiber Bragg grating refractive index sensor, which comprises a broadband light source, an optical coupling element and a micro nano fiber Bragg grating connected in sequence, and a wavelength detecting unit connected to the optical coupling element, wherein optical signals emitted by the broadband light source are incident on the micro nano fiber Bragg grating through the optical coupling element, is reflected by the micro nano fiber Bragg grating and is then incident to the optical wavelength detecting unit through the optical coupling element; and the micro nano fiber Bragg grating has multiple higher harmonic reflection signals, the difference in sensitivity of the wavelength of each harmonic reflection signal to the ambient refractive index isdifferent from the sensitivity to the ambient temperature, and the ambient refractive index and the temperature can be measured at the same time. The novel micro nano fiber Bragg grating refractive index sensor has the advan