High temperature-pressure FBG sensor applied to special environments

Hong-liang, 王宏亮 Wang; Juan, 宋娟 Song; De-quan, 冯德全 Feng; Hua-chun, 邬华春 Wu

doi:10.3788/ope.20111903.0545

Cited by 8 publications

(1 citation statement)

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“…In industries such as metallurgy, electric power, building materials, and the chemical industry, there are more and more situations where the working environment temperature exceeds 500 °C, that is, the demand for monitoring the high-temperature environment is also increasing. The common fiber temperature sensors are Fiber Bragg grating (FBG) and long period fiber grating (LPFG) [ 13 , 14 , 15 ]. For example, as early as 2004, D Grobnic et al proposed a high-temperature stable Bragg grating that has been inscribed in sapphire fibers and has been tested as a sensor for temperatures up to 1700 °C [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Measurement of a Fiber Probe Sensor Based on the Michelson Interferometer

Guo

Lian

Zhang

et al. 2021

Sensors

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In this paper, a fiber probe high-temperature sensor based on the Michelson Interferometer (MI) is proposed and experimentally verified. We used a fiber splicing machine to fabricate a taper of the single-mode fiber (SMF) end. The high order modes were excited at the taper, so that different modes were transmitted forward in the fiber and reflected by the end face of the fiber and then recoupled back to the fiber core to form MI. For comparison, we also coated a thin gold film on the fiber end to improve the reflectivity, and the reflection intensity was improved by 16 dB. The experimental results showed that the temperature sensitivity at 1506 nm was 80 pm/°C (100 °C~450 °C) and 109 pm/°C (450 °C~900 °C). The repeated heating and cooling processes showed that the MI structure had good stability at a temperature up to 900 °C. This fiber probe sensor has the advantages of a small size, simple structure, easy manufacturing, good stability, and broad application prospects in industrial and other environments.

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Section: Introductionmentioning

confidence: 99%