Abstract

In this paper, we present an in line plastic-optical-fiber (POF) temperature sensor based on intensity modulation. The in line POF temperature sensor is composed of a POF, including an in-fiber micro hole filled with reversible thermochromic material, the transmittance of which depends on temperature. The reversible thermochromic material was cobalt chloride/polyvinyl butyral gel. A cobalt chloride solution of concentration 30.8 mM was formulated using 10% water/90% ethanol (v/v) solution, and gelled by dissolving polyvinyl butyral in this solution. Four types of in line POF sensors, with in line micro holes of four different diameters, were fabricated to measure temperature in the range of 25 to 75 °C. The output optical power of all of these in line POF temperature sensors was inversely proportional to the temperature; the relation between output power and temperature was approximately linear, and the sensitivity was proportional to the diameter of the in-fiber micro hole. The experimental results indicate that an in line POF sensor can be used effectively for measuring moderate temperatures.

© 2021 Optical Society of Korea

Cascaded plastic optical fiber based SPR sensor for simultaneous measurement of refractive index and temperature

Chuanxin Teng, Xinjing Li, Ming Chen, Shijie Deng, Hongchang Deng, Minmin Xue, Libo Yuan, Rui Min, Xiaosong Fu, and Xuehao Hu
Biomed. Opt. Express 15(2) 793-801 (2024)

Wet etching technique for fabrication of a high-quality plastic optical fiber sensor

Mingfu Zhao, Lang Dai, Nianbing Zhong, Zhengkun Wang, Ming Chen, Bingxin Li, Binbin Luo, Bin Tang, Shenghui Shi, Tao Song, and Xue Zou
Appl. Opt. 56(31) 8845-8850 (2017)

Temperature dependence of a refractive index sensor based on a macrobending micro-plastic optical fiber

Ning Jing, Chuanxin Teng, Xiaowei Zhao, and Jie Zheng
Appl. Opt. 54(8) 1890-1893 (2015)

Plastic optical fiber sensor for temperature-independent high-sensitivity detection of humidity

Nainbing Zhong, Xin Xin, Huimin Liu, Xiaoyi Yu, Haixing Chang, Bing Tang, Dengjie Zhong, Mingfu Zhao, Hongmin Zhang, and Jie Zhao
Appl. Opt. 59(19) 5708-5713 (2020)

Refractive index sensor based on a multi-notched plastic optical fiber

Chuanxin Teng, Ning Jing, Fangda Yu, Yue Ding, and Jie Zheng
Appl. Opt. 56(7) 1833-1838 (2017)