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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 15406–15417

Polarization-dependent curvature sensor based on an in-fiber Mach-Zehnder interferometer with a difference arithmetic demodulation method

Changyu Shen, Chuan Zhong, Yang You, Jinlei Chu, Xin Zou, Xinyong Dong, Yongxing Jin, Jianfeng Wang, and Huaping Gong  »View Author Affiliations

Optics Express, Vol. 20, Issue 14, pp. 15406-15417 (2012)

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A curvature sensor based on a polarization-dependent in-fiber Mach-Zehnder interferometer (MZI) is proposed. The MZI is fabricated by core-offset fusion splicing one section of polarization maintaining fiber (PMF) between two single mode fibers (SMFs). Two independent interference patterns corresponding to the two orthogonal polarization modes for the PMF are obtained. The couple efficiency between the core mode and the cladding mode decreased with the increasing of the bending on the MZI part. The curvature variation on the MZI part can be obtained by detecting the fringe visibility of the interference patterns. A difference arithmetic demodulation method is used to reduce the effects of the light source power fluctuations and temperature cross-sensitivity. Experimental results show that maximal sensitivity of −0.882 dB/m−1 is obtained under a measurement range of 0.1 to 0.35 m−1 for the curvature sensor. With the use of difference arithmetic demodulation method, the temperature-curvature cross-sensitivity and light source power fluctuations effects on the proposed sensor are decreased by 94% and 91%, respectively.

© 2012 OSA

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2420) Fiber optics and optical communications : Fibers, polarization-maintaining
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:

Original Manuscript: May 14, 2012
Revised Manuscript: June 16, 2012
Manuscript Accepted: June 21, 2012
Published: June 25, 2012

Changyu Shen, Chuan Zhong, Yang You, Jinlei Chu, Xin Zou, Xinyong Dong, Yongxing Jin, Jianfeng Wang, and Huaping Gong, "Polarization-dependent curvature sensor based on an in-fiber Mach-Zehnder interferometer with a difference arithmetic demodulation method," Opt. Express 20, 15406-15417 (2012)

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  1. P. Lu, L. Men, K. Sooley, and Q. Chen, “Tapered fiber Mach-Zehnder interferometer for simultaneous measurement of refractive index and temperature,” Appl. Phys. Lett. 94(13), 131110 (2009). [CrossRef]
  2. H. Y. Choi, M. J. Kim, and B. H. Lee, “All-fiber Mach-Zehnder type interferometers formed in photonic crystal fiber,” Opt. Express 15(9), 5711–5720 (2007). [CrossRef] [PubMed]
  3. T. Wei, X. Lan, and H. Xiao, “Fiber inline core-cladding-mode Mach-Zehnder interferometer fabricated by two-point CO2 laser irradiations,” IEEE Photon. Technol. Lett. 21(10), 669–671 (2009). [CrossRef]
  4. X. Yu, P. Shum, and X. Dong, “Photonic-crystal-fiber-based Mach-Zehnder interferometer using long-period gratings,” Microw. Opt. Technol. Lett. 48(7), 1379–1383 (2006). [CrossRef]
  5. L. C. Li, L. Xia, Z. H. Xie, and D. M. Liu, “All-fiber Mach-Zehnder interferometers for sensing applications,” Opt. Express 20(10), 11109–11120 (2012). [CrossRef] [PubMed]
  6. O. Frazão, J. Viegas, P. Caldas, J. L. Santos, F. M. Araújo, L. A. Ferreira, and F. Farahi, “All-fiber Mach-Zehnder curvature sensor based on multimode interference combined with a long-period grating,” Opt. Lett. 32(21), 3074–3076 (2007). [CrossRef] [PubMed]
  7. Y. Zhou, W. J. Zhou, C. C. Chan, W. C. Wong, L. Y. Shao, J. Cheng, and X. Dong, “Simultaneous measurement of curvature and temperature based on PCF-based interferometer and fiber Bragg grating,” Opt. Commun. 284(24), 5669–5672 (2011). [CrossRef]
  8. W. C. Wong, C. C. Chan, H. P. Gong, and K. C. Leong, “Mach-Zehnder Photonic Crystal Interferometer in Cavity Ring-Down Loop for Curvature Measurement,” IEEE Photon. Technol. Lett. 23(12), 795–797 (2011). [CrossRef]
  9. M. Deng, C. P. Tang, T. Zhu, and Y. J. Rao, “Highly sensitive bend sensor based on Mach-Zehnder interferometer using photonic crystal fiber,” Opt. Commun. 284(12), 2849–2853 (2011). [CrossRef]
  10. D. M. Hernandez, A. M. Rios, I. T. Gomez, and G. S. Delgado, “Compact optical fiber curvature sensor based on concatenating two tapers,” Opt. Lett. 36(22), 4381–4382 (2011).
  11. R. M. Silva, M. S. Ferreira, J. Kobelke, K. Schuster, and O. Frazão, “Simultaneous measurement of curvature and strain using a suspended multicore fiber,” Opt. Lett. 36(19), 3939–3941 (2011). [CrossRef] [PubMed]
  12. B. Dong, J. Z. Hao, and Z. W. Xu, “Temperature insensitive curvature measurement with a core-offset polarization maintaining photonic crystal fiber based interferometer,” Opt. Fiber Technol. 17(3), 233–235 (2011). [CrossRef]
  13. Z. Tian, S. S. H. Yam, and H. P. Loock, “Single-mode fiber refractive index sensor based on core-offset attenuators,” IEEE Photon. Technol. Lett. 20(16), 1387–1389 (2008). [CrossRef]
  14. H. P. Gong, C. C. Chan, P. Zu, L. H. Chen, and X. Y. Dong, “Curvature measurement by using low-birefringence photonic crystal fiber based Sagnac loop,” Opt. Commun. 283(16), 3142–3144 (2010). [CrossRef]
  15. L. Y. Shao, A. Laronche, M. Smietana, P. Mikulic, W. J. Bock, and J. Albert, “Highly sensitive bend sensor with hybrid long-period and tilted fiber Bragg grating,” Opt. Commun. 283(13), 2690–2694 (2010). [CrossRef]
  16. D. Wu, T. Zhu, M. Deng, D. W. Duan, L. L. Shi, J. Yao, and Y. J. Rao, “Refractive index sensing based on Mach-Zehnder interferometer formed by three cascaded single-mode fiber tapers,” Appl. Opt. 50(11), 1548–1553 (2011). [CrossRef] [PubMed]
  17. Y. P. Wang, C. L. Zhao, J. Kang, Y. X. Jin, and X. Y. Dong, “A highly birefringent fiber loop mirror temperature sensor demodulation based on a long period grating in photonic crystal fiber with differential processing,” Microw. Opt. Technol. Lett. 54(1), 176–179 (2012). [CrossRef]
  18. Y. Li, E. Harris, L. Chen, and X. Y. Bao, “Application of spectrum differential integration method in an in-line fiber Mach-Zehnder refractive index sensor,” Opt. Express 18(8), 8135–8143 (2010). [CrossRef] [PubMed]
  19. Y. Li, L. Chen, E. Harris, and X. Y. Bao, “Double-Pass In-Line fiber taper Mach-Zehnder interferometer sensor,” IEEE Photon. Technol. Lett. 22(23), 1750–1752 (2010). [CrossRef]

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