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Optics Letters

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  • Vol. 36, Iss. 17 — Sep. 1, 2011
  • pp: 3380–3382

Higher-order interference of low-coherence optical fiber sensors

Jun Yang, Yonggui Yuan, Bing Wu, Ai Zhou, and Libo Yuan  »View Author Affiliations


Optics Letters, Vol. 36, Issue 17, pp. 3380-3382 (2011)
http://dx.doi.org/10.1364/OL.36.003380


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Abstract

The higher-order interference noise that is caused by multireflection at the fiber sensor’s end surface in low- coherence fiber sensor array is proposed. The generation of the higher-order interference noise and its quantity and amplitude are theoretically analyzed. The second-order interference noises are experimentally demonstrated. The results show that the second-order noises arise in any sensor array composed of more than two sensors and the number of the second-order peaks is proportional to the third power of the sensor’s number. The ratio of the amplitude of the second-order noise to that of the signal peak is proportional to the reflectivity of the sensor’s end surface. In a sensor array, when the reflectivity is more than 10 5 , the amplitude of the second-order noise is higher than other noises and it becomes a main factor that determines the signal-to-noise ratio of the sensor arrays. Therefore, reducing the higher-order interference noise can improve the multiplexing capacity of the sensor array.

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4230) Fiber optics and optical communications : Multiplexing

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 29, 2011
Manuscript Accepted: July 20, 2011
Published: August 23, 2011

Citation
Jun Yang, Yonggui Yuan, Bing Wu, Ai Zhou, and Libo Yuan, "Higher-order interference of low-coherence optical fiber sensors," Opt. Lett. 36, 3380-3382 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-17-3380

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