19 May 2006 Application of homodyne demodulation system in fiber optic sensors using phase generated carrier based on LabVIEW in pipeline leakage detection
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Abstract
Phase generated carrier (PGC) homodyne demodulation technique is frequently used in optical fiber interferometric sensors for demodulating sensing signals. However, it is difficult for the system to achieve optimum performance because the electronic components which constitute the analog circuit of a PGC homodyne demodulation system have some problems such as overload, improper resistance, etc. all those will bring noise to the system. Therefore, the system could not be allowed to work well for those noises introduced by electronic components. For overcoming these disadvantages of the analog circuit mentioned above, a digital PGC demodulation system based on LabVIEW is described in this paper, and it is applied to demodulate the sensing signals from all fiber oil pipeline leakage detection system based on Sagnac interferometer. The results verify that this system can well demodulate sensing signals.
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Cunfu He, Cunfu He, Lijun Hang, Lijun Hang, Bin Wu, Bin Wu, } "Application of homodyne demodulation system in fiber optic sensors using phase generated carrier based on LabVIEW in pipeline leakage detection", Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 61502G (19 May 2006); doi: 10.1117/12.676892; https://doi.org/10.1117/12.676892
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