OSA's Digital Library

Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 1 — Jan. 1, 2012
  • pp: 67–69

Refractive index sensor using microfiber-based Mach–Zehnder interferometer

Jianghai Wo, Guanghui Wang, Ying Cui, Qizhen Sun, Ruibing Liang, Perry Ping Shum, and Deming Liu  »View Author Affiliations

Optics Letters, Vol. 37, Issue 1, pp. 67-69 (2012)

View Full Text Article

Enhanced HTML    Acrobat PDF (397 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A simple and robust refractive index (RI) sensor based on a Mach–Zehnder interferometer has been demonstrated. A section of optical microfiber drawn from silica fiber is employed as the sensing arm. Because of the evanescent field, a slight change of the ambient RI will lead to the variation of the microfiber propagation constant, which will further change the optical length. In order to compensate the variation of the optical length difference, a tunable optical delay line (ODL) is inserted into the other arm. By measuring the delay of the ODL, the ambient RI can be simply demodulated. A high RI sensitivity of about 7159μm/refractive index unit is achieved at microfiber diameter of 2.0 μm.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 9, 2011
Revised Manuscript: November 4, 2011
Manuscript Accepted: November 15, 2011
Published: December 24, 2011

Jianghai Wo, Guanghui Wang, Ying Cui, Qizhen Sun, Ruibing Liang, Perry Ping Shum, and Deming Liu, "Refractive index sensor using microfiber-based Mach–Zehnder interferometer," Opt. Lett. 37, 67-69 (2012)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. L. M. Tong, J. Lou, and E. Mazur, Opt. Express 12, 1025 (2004). [CrossRef]
  2. M. Sumetsky, Opt. Lett. 31, 870 (2006). [CrossRef]
  3. L. M. Tong, R. R. Gattass, J. B. Ashcom, S. L. He, J. Y. Lou, M. Y. Shen, I. Maxwell, and E. Mazur, Nature 426, 816 (2003). [CrossRef]
  4. J. Bures and R. Ghosh, J. Opt. Soc. Am. A 16, 1992 (1999). [CrossRef]
  5. S. G. Leon-Saval, T. A. Birks, W. J. Wadsworth, and P. St. J. Russell, Opt. Express 12, 2864 (2004). [CrossRef]
  6. K. J. Huang, S. Y. Yang, and L. M. Tong, Appl. Opt. 46, 1429 (2007). [CrossRef]
  7. P. Polynkin, A. Polynkin, N. Peyghambarian, and M. Mansuripur, Opt. Lett. 30, 1273 (2005). [CrossRef]
  8. F. Xu, P. Horak, and G. Brambilla, Opt. Express 15, 7888 (2007). [CrossRef]
  9. X. Guo and L. M. Tong, Opt. Express 16, 14429 (2008). [CrossRef]
  10. M. Sumetsky, Y. Dulashko, and S. Ghalmi, Opt. Lasers Eng. 48, 272 (2010). [CrossRef]
  11. F. Xu and G. Brambilla, Appl. Phys. Lett. 92, 101126 (2008). [CrossRef]
  12. X. Fang, C. R. Liao, and D. N. Wang, Opt. Lett. 35, 1007 (2010). [CrossRef]
  13. Y. Zhang, B. Lin, S. C. Tjin, H. Zhang, G. H. Wang, P. Shum, and X. L. Zhang, Opt. Express 18, 26345 (2010). [CrossRef]
  14. Y. H. Li and L. M. Tong, Opt. Lett. 33, 303 (2008). [CrossRef]
  15. C. R. Liao, D. N. Wang, X. Y. He, and M. W. Yang, IEEE Photon. Technol. Lett. 23, 848 (2011). [CrossRef]
  16. A. W. Snyder and J. Love, Optical Waveguide Theory(Chapman and Hall, 1983).
  17. N. Takato, T. Kominato, A. Sugita, K. Jinguji, H. Toba, and M. Kawachi, IEEE J. Sel. Areas Commun. 8, 1120 (1990). [CrossRef]
  18. Y. M. Jung, Y. C. Jeong, G. Brambilla, and D. J. Richardson, Opt. Lett. 34, 2369 (2009). [CrossRef]
  19. G. K. White, J. Phys. D 6, 2070 (1973). [CrossRef]
  20. F. N. D. D. Pereira and A. C. H. Hallett, Rev. Sci. Instrum. 42, 490 (1971). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited