Fiber Loop Mirror Based on Optical Fiber Circulator for Sensing Applications
Citation
Robalinho, P.; Soares, B.; Lobo Ribeiro, A.; Silva, S.; Frazão, O. Fiber Loop Mirror Based on Optical Fiber Circulator for Sensing Applications. Sensors 2023, 23, 618. https://doi.org/10.3390/s23020618
Keywords
- Fiber Loop Mirror (FLM)
- Optical fiber sensor
- Optical circulator
- Sensing applications
- Strain sensor/measurement
- Torsion sensor/measurement
- Birefringence
- Interferometer
- Free Spectral Range (FSR)
- Vernier effect
- Polarization controller
- Single-mode optical fiber
- Fast Fourier Transformer (FFT)
- Sensitivity
- Optical spectrum analyzer (OSA)
- Refractive index
- Optical path difference
- Wavelength shift
- Amplitude variation
- Frequency shift
Brief
This paper presents and characterizes a novel Fiber Loop Mirror (FLM) configuration utilizing two circulators for strain and torsion discrimination in sensing applications, achieving a balanced system with versatile Free Spectral Range (FSR) control.
Summary
This paper presents a novel fiber loop mirror (FLM) design using two optical circulators for simultaneous strain and torsion sensing. This new setup allows for a balanced system, control over the free spectral range (FSR) by varying fiber lengths and refractive indices, and achieves specific sensitivities for measuring both strain and torsion. The configuration also opens possibilities for highly sensitive sensors using the Vernier effect with shorter fibers.
Origin: https://www.mdpi.com/1424-8220/23/2/618