In-Fiber BaTiO<sub>3</sub> Microsphere Resonator for High-Sensitivity Temperature Measurement

Chi Li; Meng Zhu; Peng Ji; Cong Xiong; Changrui Liao

doi:10.3390/mi12030318

Micromachines (Mar 2021)

In-Fiber BaTiO<sub>3</sub> Microsphere Resonator for High-Sensitivity Temperature Measurement

Chi Li,
Meng Zhu,
Peng Ji,
Cong Xiong,
Changrui Liao

Affiliations

Chi Li: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Meng Zhu: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Peng Ji: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Cong Xiong: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Changrui Liao: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

DOI: https://doi.org/10.3390/mi12030318
Journal volume & issue: Vol. 12, no. 3
p. 318

Abstract

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A fiber optic whispering gallery mode (WGM) resonator was proposed and realized by integrating an inline polymer waveguide with a microsphere mounted on it. The polymer waveguide with a diameter of 1 μm was printed with femtosecond laser-assisted multiphoton polymerization in a section of a grooved hollow-core fiber, which was sandwiched between two single-mode fibers. Two WGW resonators assembled with microspheres of different sizes were prepared. The transmission spectra of those stimulated WGMs were investigated both in simulation and experimentally. The temperature response of the resonators was particularly studied, and a linear sensitivity of −593 pm/°C was achieved from 20 °C to 100 °C.

Published in Micromachines

ISSN: 2072-666X (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://www.mdpi.com/journal/micromachines

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