Optical pressure sensor using a low-coherence light source with a highly birefringent fiber

Preecha P. Yupapin; Kenneth Weir; Kenneth T. V. Grattan; Andrew W. Palmer

doi:10.1117/12.140167

9 February 1993 Optical pressure sensor using a low-coherence light source with a highly birefringent fiber

Preecha P. Yupapin, Kenneth Weir, Kenneth T. V. Grattan, Andrew W. Palmer

Proceedings Volume 1712, 14th Symposium on Photonic Measurement; (1993) https://doi.org/10.1117/12.140167
Event: 14th Symposium of the TC2 on Photonic Measurements, 1992, Sopron, Hungary

Abstract

A polarimetric interferometric based pressure sensor, using a photoelastic material as a sensing element is demonstrated. The light source used was a multimode laser diode, coupled into the system through a highly birefringent fiber to provide a reference bias signal. The arrangement of the sensor system produces birefringence in the sensing element, and a Michelson interferometer to which the light then passes is used for signal processing. The path difference induced by the pressure was measured by re-establishing the interference condition in this Michelson interferometer. The pressure to be measured was applied by placing a calibrated mass on the sensing element. Results are presented showing the potential of such a system for pressure sensor applications.

Citation Download Citation

Preecha P. Yupapin, Kenneth Weir, Kenneth T. V. Grattan, and Andrew W. Palmer "Optical pressure sensor using a low-coherence light source with a highly birefringent fiber", Proc. SPIE 1712, 14th Symposium on Photonic Measurement, (9 February 1993); https://doi.org/10.1117/12.140167

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