Spectra of the small Fabry–Perot interferometer (FPI) of the size of the order of the wavelength, with the main mode excited by a quantum field from a nano–LED or a laser, are investigated. The input field is detuned from the FPI mode with only a few photons. We formulate the conven...
fibre interferometer; displacement measurement; Kalman filter; parasitic effect1. Introduction Laser interferometry is the industry standard in the field of high-precision measurement. Low-energy lasers do not touch and damage the target surface [1,2]. Laser interferometry has the advantages of ...
However, this effect is mostly related to the variation of optical power intensity. If accuracy and multinode sensing are the main concerns, fiber Bragg grating technology can be integrated as a refractory optic system [56]. 4. Conclusions A low frequency-vibration sensor that integrates a dual ...
However, the polymer-based fiber-top microcantilevers coated with palladium have some limitations, such as the temperature cross-sensitivity caused by the thermal expansion effect, crosstalk from other active gases in the mixture, and a monotonous structure. In 2022, the same research group extended...
To model the effect of temperature variation on the parameters of the sensor, the linear dependence of the media refractive index and the interferometer length on the temperature change is used: 𝑛𝑖(𝑇)=𝑛𝑖(1+(𝑑𝑛𝑖/𝑑𝑇)⋅Δ𝑇),𝑖=1,2,𝐻(𝑇)=𝐻0(1+𝛼...
such as the temperature cross-sensitivity caused by the thermal expansion effect, crosstalk from other active gases in the mixture, and a monotonous structure. In 2022, the same research group extended the structures of the polymer microcantilever [64]. Three different forms, namely rectangular solid...
However, this effect is mostly related to the variation of optical power intensity. If accuracy and multinode sensing are the main concerns, fiber Bragg grating technology can be integrated as a refractory optic system [56]. 4. Conclusions A low frequency-vibration sensor that integrates a dual ...
Owing to the modulation effect of the FPI, high-frequency interferometric information outside the maximal OPD is encoded into low-frequency interferometric information, which can be obtained by the inversion algorithm. This method of enhancing the spectral resolution can be equated to increasing the ...