Abstract
The effect of hydrostatic pressure (up to 28 MPa) on Brillouin frequency
shift (BFS) within two types of bare, single-mode fibers is studied via Brillouin
optical time domain analysis technique. Experimental results show a negative linear
relation between pressure and BFS, with almost the same sensitivity in both types of
fibers. The average value of experimental slopes is -0.742 MHz/MPa. This value is
found to be well suited to theoretical analysis on the basis of data on bulk silica
glass in previous reports. This preliminary evaluation may result in a new method
for distributed pressure sensing along silica optical fiber.
© 2012 Chinese Optics Letters
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