Emission performance of optical fibre dissolved oxygen sensor using various optical fibre materials and parameters

Abstract

We demonstrate the performance of optical fibre dissolved oxygen (DO) sensor when subject to different core material and sizes. It was found that fluorescence emission from oxygen sensitive material coated at the end-face of an optical fibre DO sensor varies with core material and sizes. Glass core optical fibre provides higher emission when compared to plastic core optical fibre. Using glass core optical fibre, up to 20 meter of optical fibre length can be achieved compared to other reported work.

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

“…In the field of fiber-optic dissolved oxygen sensors, past work reported only the use of short fibers. However, Mahmud examined long glass fibers up to 20 m long, whereby the electronics could be located further away from sensor elements [130]. This sensor has more flexibility when deployed and is important for the online detection of dissolved oxygen.…”

“…The advantages of fluorescence quenching optical dissolved oxygen sensors are very clear [142]. This type of sensor overcomes the disadvantages of traditional polarographic dissolved oxygen sensors, such as poor stability and reliability, strong dependence on the fluid velocity, and easily influenced electrode polarization [143], and has a higher sensitivity, faster response, zero oxygen consumption [144], low weight, high precision [145], and excellent electromagnetic interference (EMI) resistance, using the advantages of a good effect in harsh environments [130]. For example, Janzen improved the electrochemical dissolved oxygen sensor SBE 43 [69], but the sensor drift is very serious, mainly due to the easy fouling; thus, it needs frequent maintenance and calibration [146,147].…”