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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 25 — Dec. 16, 2013
  • pp: 30474–30480

Multiplexed fiber-ring laser sensors for ultrasonic detection

Tongqing Liu, Lingling Hu, and Ming Han  »View Author Affiliations

Optics Express, Vol. 21, Issue 25, pp. 30474-30480 (2013)

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We propose and demonstrate a multiplexing method for ultrasonic sensors based on fiber Bragg gratings (FBGs) that are included inside the laser cavity of a fiber-ring laser. The multiplexing is achieved using add-drop filters to route the light signals, according to their wavelengths, into different optical paths, each of which contains a separate span of erbium-doped fiber (EDF) as the gain medium. Because a specific span of EDF only addresses a single wavelength channel, mode completion is avoided and the FBG ultrasonic sensors can be simultaneously demodulated. The proposed method is experimentally demonstrated using a two-channel system with two sensing FBGs in a single span of fiber.

© 2013 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:

Original Manuscript: September 17, 2013
Revised Manuscript: November 6, 2013
Manuscript Accepted: November 16, 2013
Published: December 4, 2013

Tongqing Liu, Lingling Hu, and Ming Han, "Multiplexed fiber-ring laser sensors for ultrasonic detection," Opt. Express 21, 30474-30480 (2013)

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