Abstract
An optical fiber curvature sensor based on a twisted multimode fiber (MMF) sandwiched between two single-mode fibers (SMF) is proposed and investigated theoretically and experimentally. The measured transmission spectrum exhibits good agreement with theoretical predictions. Compared with a traditional single-mode-multimode-single-mode fiber structure sensor, the proposed configuration offers a higher average curvature sensitivity of -2.42 nm/m-1 over a curvature measurement range of 0-1.7390 m-1 and -7.09 dB/m-1 at an operating wavelength of 1537 nm. The temperature sensitivity of this sensor has been determined as 0.01 nm/°C over a wavelength range of 1535-1550 nm and circa 0.007 dB/°C at the wavelength of 1537 nm, over a measured temperature range of 21-121 °C.
Original language | English |
---|---|
Article number | 7812632 |
Pages (from-to) | 1725-1731 |
Number of pages | 7 |
Journal | Journal of Lightwave Technology |
Volume | 35 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 May 2017 |
Keywords
- Curvature sensor
- Mach-Zehnder interferometer
- multimode interference
- temperature dependence