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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 15 — Aug. 1, 2012
  • pp: 3174–3176

Spatial characterization of the response of a silica optical fiber to wideband ultrasound

Amir Rosenthal, Miguel Ángel Araque Caballero, Stephan Kellnberger, Daniel Razansky, and Vasilis Ntziachristos  »View Author Affiliations

Optics Letters, Vol. 37, Issue 15, pp. 3174-3176 (2012)

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Optical fibers have long been recognized as a promising technology for remote sensing of ultrasound. Nonetheless, very little is known about the characteristics of their spatial response, which is significantly affected by the strong acoustic mismatches between the fiber and surrounding medium. In this Letter, a new method is demonstrated for wideband spatial acoustic characterization of optical fibers. The method is based on the excitation of a point-like acoustic source via the opto-acoustic effect, while a miniature fiber sensor is implemented by a π-phase-shifted fiber Bragg grating. Despite the relative complexity of acoustic wave propagation in the fiber, its spatial sensitivity in the high frequency band (6–30 MHz) exhibited an orderly pattern, which can be described by a simple model. This property reveals new possibilities for high-performance imaging using fiber-based ultrasound sensors, where knowledge of the sensor’s spatial sensitivity map is generally required.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(170.7170) Medical optics and biotechnology : Ultrasound
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: May 11, 2012
Revised Manuscript: June 13, 2012
Manuscript Accepted: June 19, 2012
Published: July 25, 2012

Amir Rosenthal, Miguel Ángel Araque Caballero, Stephan Kellnberger, Daniel Razansky, and Vasilis Ntziachristos, "Spatial characterization of the response of a silica optical fiber to wideband ultrasound," Opt. Lett. 37, 3174-3176 (2012)

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