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
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
Fiber Optics and Optical Communications
Haidong Gu, Huijuan Dong, Guangyu Zhang, Jun He, Ning Xu, and Douglas. J. Brown, "Pressure dependence of Brillouin frequency shift in bare silica optical fibers," Chin. Opt. Lett. 10, 100604-100604 (2012)