Abstract

We demonstrate a highly sensitive temperature sensor based on a stress-induced high-birefringence-fiber Sagnac loop that uses a Nd-doped-fiber amplified spontaneous emission source. Relative temperature sensing is done in the spectral domain by shifts of a resonant wavelength λr and absolute temperature sensing by changes in separation between resonances Δλ. The measured relative change of these parameters with temperature in the range 15–110 °C, is 1/λrδλr/δT=-1/ΔλδΔλ/δT1/ΔnδΔn/δT-0.94±0.02×10-3/K, with measured fiber birefringence Δn=8×10-4. This gives a wavelength-shift sensitivity of -1.00 nm/K at 1.065 µm and a resonance separation sensitivity of 0.006 nm/K for Δλ=6.8 nm. This telemetric point sensor has a loop length of 80 m, an operational bandwidth of more than 50 nm, and a temperature accuracy of better than 1 °C.

© 1997 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
High-performance fiber-optic temperature sensor using low-coherence interferometry

Han-Sun Choi, Henry F. Taylor, and Chung E. Lee
Opt. Lett. 22(23) 1814-1816 (1997)

Interferometric temperature-insensitive strain measurement with different-diameter fiber Bragg gratings

Minho Song, Byoungho Lee, Sang Bae Lee, and Sang Sam Choi
Opt. Lett. 22(11) 790-792 (1997)

Compensation of polarization-dependent loss in transmission fiber gratings by use of a Sagnac loop interferometer

Chang-Seok Kim, Bernard Choi, J. Stuart Nelson, Qun Li, Pedram Zare Dashti, and H. P. Lee
Opt. Lett. 30(1) 20-22 (2005)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription