Share Email Print

Proceedings Paper

Fiber-Optic Pressure Sensor Using Birefringence In Side-Hole Fiber
Author(s): Ph . Dabkiewicz; K. Jansen
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

An experimental pressure sensor for pressures up to 1000 bars is described, in which a side-hole fiber is exposed directly to an unknown hydrostatic pressure. The cross-section of the fiber resembles that of a PANDA fiber but it has two open channels in place of the stress applying parts. A hydrostatic pressure acting from outside on the fiber builds up an anisotropic elastic stress in the fiber core which elasto-optically induces birefringence. The resulting phase delay, which changes linearly with pressure, is counted bi-directionally in a polarimetric setup. Thus the sensor operates in an incremental mode. With a pressurized fiber length of 10 cm, a phase sensitivity of 7.78 rad/(bar•m) at X = 1300 nm, and a resolution of the optical phase of 7/2, a pressure resolution of π/2 bars is achieved. In the pressure range of 100 - 1000 bars where unambiguous phase evaluation is possible, the overall accuracy is better than ± 0.5%. In one fiber, phase evaluation becomes ambiguous below 100 bars, near the point where the birefringence vanishes.

Paper Details

Date Published: 17 September 1987
PDF: 5 pages
Proc. SPIE 0734, Fibre Optics '87, (17 September 1987); doi: 10.1117/12.938018
Show Author Affiliations
Ph . Dabkiewicz, Technische Universitat Hamburg-Harburg (Germany)
K. Jansen, Technische Universitat Hamburg-Harburg (Germany)

Published in SPIE Proceedings Vol. 0734:
Fibre Optics '87
Lionel R. Baker, Editor(s)

© SPIE. Terms of Use
Back to Top