Application of homodyne demodulation system in fiber optic sensors using phase generated carrier based on LabVIEW in pipeline leakage detection

Cunfu He; Lijun Hang; Bin Wu

doi:10.1117/12.676892

19 May 2006 Application of homodyne demodulation system in fiber optic sensors using phase generated carrier based on LabVIEW in pipeline leakage detection

Cunfu He, Lijun Hang, Bin Wu

Author Affiliations +

Proceedings Volume 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 61502G (2006) https://doi.org/10.1117/12.676892
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

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.

Citation Download Citation

Cunfu He, Lijun Hang, and 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); https://doi.org/10.1117/12.676892

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