TY - GEN
T1 - A novel, high-resolution, high-speed fiber-optic temperature sensor for oceanographic applications
AU - Hou, Weilin
AU - Liu, Guigen
AU - Han, Ming
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/4/29
Y1 - 2015/4/29
N2 - A novel fiber-optic thermometer based on a thick silicon Fabry-Pérot interferometer (FPI) realized on the tip of a cleaved single-mode fiber has been designed and implemented, in order to achieve high resolution and high sampling rate necessary for studying underwater turbulent microstructures. The choice of silicon for its large thermal-optic coefficient and thermal expansion coefficient enables a high sensitivity of 84 pm/°C. A new data processing method, using average wavelength tracking, is proposed to reduce the wavelength noise. The high sensitivity along with the low wavelength noise results in a temperature resolution as high as 0.0009 °C. Furthermore, the good thermal conductivity of silicon endows the proposed sensor with a response time ~ 2 ms, which allows a sampling frequency of 500 Hz. By further optimizing the sensor structure, e.g. size of the silicon FPI, a better temperature resolution and quicker response can be expected. This novel temperature sensor significantly augments underwater sensing capabilities, especially those related to microstructure turbulence mixing process in the ocean. A preliminary experimental demonstration is presented, where the sensor was used to measure the highly dynamic temperature variations induced by a sharp thermo-gradient underwater.
AB - A novel fiber-optic thermometer based on a thick silicon Fabry-Pérot interferometer (FPI) realized on the tip of a cleaved single-mode fiber has been designed and implemented, in order to achieve high resolution and high sampling rate necessary for studying underwater turbulent microstructures. The choice of silicon for its large thermal-optic coefficient and thermal expansion coefficient enables a high sensitivity of 84 pm/°C. A new data processing method, using average wavelength tracking, is proposed to reduce the wavelength noise. The high sensitivity along with the low wavelength noise results in a temperature resolution as high as 0.0009 °C. Furthermore, the good thermal conductivity of silicon endows the proposed sensor with a response time ~ 2 ms, which allows a sampling frequency of 500 Hz. By further optimizing the sensor structure, e.g. size of the silicon FPI, a better temperature resolution and quicker response can be expected. This novel temperature sensor significantly augments underwater sensing capabilities, especially those related to microstructure turbulence mixing process in the ocean. A preliminary experimental demonstration is presented, where the sensor was used to measure the highly dynamic temperature variations induced by a sharp thermo-gradient underwater.
KW - Fabry-Pérot interferometer
KW - Fiber-optic thermometer
KW - ocean microstructure
KW - turbulence
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U2 - 10.1109/CWTM.2015.7098149
DO - 10.1109/CWTM.2015.7098149
M3 - Conference contribution
AN - SCOPUS:84941248648
T3 - 2015 IEEE/OES 11th Current, Waves and Turbulence Measurement, CWTM 2015
BT - 2015 IEEE/OES 11th Current, Waves and Turbulence Measurement, CWTM 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2015 11th IEEE/OES Current, Waves and Turbulence Measurement, CWTM 2015
Y2 - 2 March 2015 through 6 March 2015
ER -