Fiber Temperature Sensor Based on Vernier Effect and Optical Time Stretching Method

Lin, Weihao1,2,3; Liu, Yuhui3; Liu, Yibin3; Shum, Perry Ping3; Vai, Mang, I1,2

2022-12-01

10.3390/mi13122215

MICROMACHINES   Impact Factor & Quartile

2072-666X

A novel method for ultra-sensitive and ultra-fast temperature sensing has been successfully implemented by cascading Saganc rings to generate the Vernier effect and doing the same dispersive fibers to achieve the optical time-stretching effect. This is different from the traditional point fiber sensor demodulated by optical spectrum analyzer (OSA) whose demodulation speed is usually at the second level. The designed system maps the wavelength domain to the time domain through the dispersive fiber, which can realize the ultra-fast temperature monitoring at the nanosecond level. The cascaded Sagnac ring is composed of polarization maintaining fiber (PMF) which is significantly affected by the thermal-optical coefficient. When the temperature changes, the variation is as high as -6.228 nm/degrees C, which is 8.5 times higher than the sensitivity based on the single Sagnac ring system. Furthermore, through the optical time stretching scheme, the corresponding response sensitivity is increased from 0.997 ns/degrees C to 7.333 ns/degrees C, and the magnification is increased 7.4 times with a response speed of 50 MHz.

temperature sensing cascading Saganc rings Vernier effect optical time-stretching effect

SCI

English

Corresponding

Chemistry ; Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics

Chemistry, Analytical ; Nanoscience & Nanotechnology ; Instruments & Instrumentation ; Physics, Applied

WOS:000903102700001

MDPI

Web of Science

1.Univ Macau, State Key Lab Analog & Mixed Signal VLSI, Macau 999078, Peoples R China
2.Univ Macau, Dept Elect & Comp Engn, Macau 999078, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen, Peoples R China

Lin, Weihao,Liu, Yuhui,Liu, Yibin,et al. Fiber Temperature Sensor Based on Vernier Effect and Optical Time Stretching Method[J]. MICROMACHINES,2022,13(12).

Lin, Weihao,Liu, Yuhui,Liu, Yibin,Shum, Perry Ping,&Vai, Mang, I.(2022).Fiber Temperature Sensor Based on Vernier Effect and Optical Time Stretching Method.MICROMACHINES,13(12).

Lin, Weihao,et al."Fiber Temperature Sensor Based on Vernier Effect and Optical Time Stretching Method".MICROMACHINES 13.12(2022).