30cm of spatial resolution using pre-excitation pulse BOTDA technique
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AuthorGalíndez Jamioy, Carlos Augusto; Quintela Incera, Antonio; Quintela Incera, María Ángeles; López Higuera, José Miguel
© 2011 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Proceedings of SPIE, 2011, vol. 7753, 77532H
21st International Conference on Optical Fiber Sensors, Ottawa, 2011
SPIE Society of Photo-Optical Instrumentation Engineers
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Optical fiber sensors
Stimulated Brillouin scattering
A pre-excitation pulse technique in Brillouin optical time domain analysis (PP-BOTDA) for enhancement of the spatial resolution is shown. The technique here exposed is based on the pre-excitation of the stimulated Brillouin scattering and the subtraction of the Brillouin scattering due to the intensity dc level present in the optical pulse. A main optical pulse with 3ns of duration followed by a pulse of 40ns and half the intensity of the main one are used for obtaining 30cm of spatial resolution. The spatial range is 3600m on a standard single mode optical fiber.