Real-Time monitoring the change process of liquid concentration using tilted fiber Bragg grating

Biqiang Jiang, Jianlian Zhao, Zhao Huang, Abdul Rauf, Chuan Qin

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We propose and experimentally demonstrate a demodulation technique for real-Time monitoring the change process of liquid concentration based on a tilted fiber Bragg grating (TFBG) and differential amplification detection. Continuous variations of the TFBG transmission power are measured by using two photodiodes (or a precision reference voltage generator instead of the referenced photodiode) along with two integrated operational amplifier circuits (IOAC). The voltage-concentration curves are obtained, by recording the output voltages of the two IOACs at different time. The experimental results show that such a fast demodulation technique is capable of measuring the effective glycerol solution concentration over the range of about 89%-69%.

Original languageEnglish
Pages (from-to)15347-15352
Number of pages6
JournalOptics Express
Volume20
Issue number14
DOIs
StatePublished - 2 Jul 2012

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