Dual-parameter demodulated torsion sensor based on the Lyot filter with a twisted polarization-maintaining fiber.
Opt Express
; 30(2): 2288-2298, 2022 Jan 17.
Article
em En
| MEDLINE
| ID: mdl-35209372
ABSTRACT
We proposed a novel torsion sensor based on the Lyot filter with the twisted polarization-maintaining fiber (PMF) acting as the birefringence medium. Lyot filter is formed by two linear polarizers and a piece of PMF. Based on the high birefringence of the PMF, the output polarization rotates with a rate equal to the twisting rate applied on the PMF, and the sensor realizes a high sensitivity of 90.072â
dB/rad. The proposed sensor also demonstrated a low strain sensitivity of 2.32 ×10 - 6 rad/µÉ. On the other hand, based on the phase hits of the polarization interference, the wavelength sensitivity reaches 15.477â
nm/rad. The monitoring range of the wavelength demodulation is complementary with the intensity demodulation in one cycle, making the valid sensing range of the proposed sensor expand. The proposed highly sensitive compact torsion sensor, with large sensing range and low crosstalk, has potential applications in many fields such as manufacturing industry, civil engineering, aerospace industry and modern smart structure monitoring.
Texto completo:
1
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article