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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 15347–15352

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

Biqiang Jiang, Jianlian Zhao, Zhao Huang, Abdul Rauf, and Chuan Qin  »View Author Affiliations

Optics Express, Vol. 20, Issue 14, pp. 15347-15352 (2012)

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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%.

© 2012 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: May 8, 2012
Revised Manuscript: June 8, 2012
Manuscript Accepted: June 8, 2012
Published: June 22, 2012

Biqiang Jiang, Jianlin Zhao, Zhao Huang, Abdul Rauf, and Chuan Qin, "Real-time monitoring the change process of liquid concentration using tilted fiber Bragg grating," Opt. Express 20, 15347-15352 (2012)

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