Fiber-integrated refractive index sensor based on a diced Fabry–Perot micro-resonator
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2017-11-09 |
| Journal | Applied Optics |
| Authors | Sergiy Suntsov, Christian E. Rüter, Tom Schipkowski, Detlef Kip |
| Institutions | Helmut Schmidt University |
| Citations | 14 |
Abstract
Section titled “Abstract”We report on a fiber-integrated refractive index sensor based on a Fabry-Perot micro-resonator fabricated using simple diamond blade dicing of a single-mode step-index fiber. The performance of the device has been tested for the refractive index measurements of sucrose solutions as well as in air. The device shows a sensitivity of 1160 nm/RIU (refractive index unit) at a wavelength of 1.55 μm and a temperature cross-sensitivity of less than 10<sup>-7</sup> RIU/°C. Based on evaluation of the broadband reflection spectra, refractive index steps of 10<sup>-5</sup> of the solutions were accurately measured. The conducted coating of the resonator sidewalls with layers of a high-index material with real-time reflection spectrum monitoring could help to significantly improve the sensor performance.