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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 8 — Apr. 12, 2010
  • pp: 8135–8143

Application of spectrum differential integration method in an in-line fiber Mach-Zehnder refractive index sensor

Yi Li, Edouard Harris, Liang Chen, and Xiaoyi Bao  »View Author Affiliations

Optics Express, Vol. 18, Issue 8, pp. 8135-8143 (2010)

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A novel spectrum differential integration (SDI) method has been proposed and verified in an in-line fiber Mach-Zehnder (MZ) refractive index (RI) sensor using salt solutions. In SDI method, the difference between two interference spectra is determined by pointwise subtraction at each wavelength, followed by integration of the absolute differences along the scan range. Compared with the widely used peak wavelength shift method, the SDI method is more reliable over a wide wavelength range (on the order of 400 nm) and results in higher sensitivity as well as reduced device-dependence. The SDI method can also be utilized with other kinds of modal interferometric sensors.

© 2010 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.3990) Optical devices : Micro-optical devices

ToC Category:

Original Manuscript: February 11, 2010
Revised Manuscript: March 22, 2010
Manuscript Accepted: March 23, 2010
Published: April 1, 2010

Yi Li, Edouard Harris, Liang Chen, and Xiaoyi Bao, "Application of spectrum differential integration method in an in-line fiber Mach-Zehnder refractive index sensor," Opt. Express 18, 8135-8143 (2010)

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