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Optics Letters

Optics Letters


  • Vol. 21, Iss. 22 — Nov. 15, 1996
  • pp: 1869–1871

Polarimetric Er3+-doped fiber distributed-feedback laser sensor for differential pressure and force measurements

J. T. Kringlebotn, W. H. Loh, and R. I. Laming  »View Author Affiliations

Optics Letters, Vol. 21, Issue 22, pp. 1869-1871 (1996)

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We propose and demonstrate a polarimetric Er3+-doped fiber distributed-feedback laser sensor in which a force applied transversely along the fiber laser induces a birefringence that gives rise to a change in the beat frequency between the two orthogonally polarized laser modes. We measure a sensitivity of ~9.6 GHz/(N/mm), a wide dynamic range with stable two-mode operation for frequency separations up to 50 GHz, and high sensor resolution owing to the narrow beat frequency bandwidth of <10 kHz. The temperature sensitivity is dominated by the temperature dependence of the inherent birefringence, which was measured to be −130 kHz/°C. The sensor permits independent pressure–force and temperature measurements.

© 1996 Optical Society of America

Original Manuscript: May 22, 1996
Published: November 15, 1996

J. T. Kringlebotn, W. H. Loh, and R. I. Laming, "Polarimetric Er3+-doped fiber distributed-feedback laser sensor for differential pressure and force measurements," Opt. Lett. 21, 1869-1871 (1996)

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