Bend-Insensitive Simultaneous Measurement of Strain and Temperature based on Cascaded Long-Period Fiber Gratings Inscribed on a Polarization-Maintaining Photonic Crystal Fiber
Citation
Kim, D. K., Lee, S. L., Choi, S., Kim, M. S., Kim, J., Han, J., & Lee, Y. W. (2020). Bend-Insensitive Simultaneous Measurement of Strain and Temperature based on Cascaded Long-Period Fiber Gratings Inscribed on a Polarization-Maintaining Photonic Crystal Fiber. Journal of the Korean Physical Society, 76(9), 810-818. doi: 10.3938/jkps.76.810
Keywords
- Optical fiber device
- Long-period fiber grating (LPFG)
- Polarization-maintaining photonic crystal fiber (PMPCF)
- Bend-insensitive
- Simultaneous measurement
- Strain
- Temperature
- Cascaded LPFGs
- Birefringence
- Polarization
- Sensor head
- Interference spectra
- Sensor indicator dip (SID)
- CO2 laser inscription
- Effective refractive index
- Wavelength shift
- Cross sensitivity
- Mode coupling
- In-fiber Mach-Zehnder (MZ) interferometer
Brief
This article reports on the development and demonstration of a bend-insensitive optical fiber sensor using cascaded long-period fiber gratings on a polarization-maintaining photonic crystal fiber for simultaneous measurement of strain and temperature.
Summary
This paper presents a novel optical fiber sensor using cascaded long-period fiber gratings (LPFGs) inscribed on a polarization-maintaining photonic crystal fiber (PMPCF). This sensor enables . By analyzing the wavelength shifts of two sensor indicator dips (SIDs) obtained from orthogonal polarization states, the sensor can independently determine strain and temperature changes with good linearity. The sensor exhibited low sensitivity to bending, making it a strong candidate for practical applications requiring simultaneous and stable measurements in potentially bending environments.
Origin: https://sci.bban.top/pdf/10.3938/jkps.76.810.pdf#