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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 22813–22818

Optical fiber Fabry-Perot interferometer cavity fabricated by femtosecond laser micromachining and fusion splicing for refractive index sensing

C. R. Liao, T.Y. Hu, and D. N. Wang  »View Author Affiliations

Optics Express, Vol. 20, Issue 20, pp. 22813-22818 (2012)

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We demonstrate a fiber in-line Fabry-Perot interferometer cavity sensor for refractive index measurement. The interferometer cavity is formed by drilling a micro-hole at the cleaved fiber end facet, followed by fusion splicing. A micro-channel is inscribed by femtosecond laser micromachining to vertically cross the cavity to allow liquid to flow in. The refractive index sensitivity obtained is ~994 nm/RIU (refractive index unit). Such a device is simple in configuration, easy for fabrication and reliable in operation due to extremely low temperature cross sensitivity of ~4.8 × 10−6 RIU/°C.

© 2012 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(320.7090) Ultrafast optics : Ultrafast lasers

ToC Category:

Original Manuscript: July 6, 2012
Revised Manuscript: September 6, 2012
Manuscript Accepted: September 11, 2012
Published: September 20, 2012

C. R. Liao, T.Y. Hu, and D. N. Wang, "Optical fiber Fabry-Perot interferometer cavity fabricated by femtosecond laser micromachining and fusion splicing for refractive index sensing," Opt. Express 20, 22813-22818 (2012)

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  1. Z. X. Gao, A. Adnet, Z. Zhang, F. G. Sun, and C. P. Grover, “Monitoring changes in the refractive index of gases by means of a fiber optic Fabry-Perot interferometer sensor,” Sensors Actuat. A-Phys. 118, 117–182 (2005).
  2. P. Domachuk, I. C. M. Littler, M. Cronin-Golomb, and B. J. Eggleton, “Compact resonant integrated microfluidic refractometer,” Appl. Phys. Lett. 88(9), 093513 (2006). [CrossRef]
  3. T. Wei, Y. Han, Y. Li, H. L. Tsai, and H. Xiao, “Temperature-insensitive miniaturized fiber inline Fabry-Perot interferometer for highly sensitive refractive index measurement,” Opt. Express 16(8), 5764–5769 (2008). [CrossRef] [PubMed]
  4. J. Villatoro, V. Finazzi, G. Coviello, and V. Pruneri, “Photonic-crystal-fiber-enabled micro-Fabry-Perot interferometer,” Opt. Lett. 34(16), 2441–2443 (2009). [CrossRef] [PubMed]
  5. J. Ma, J. Ju, L. Jin, W. Jin, and D. Wang, “Fiber-tip micro-cavity for temperature and transverse load sensing,” Opt. Express 19(13), 12418–12426 (2011). [CrossRef] [PubMed]
  6. M. S. Ferreira, L. Coelho, K. Schuster, J. Kobelke, J. L. Santos, and O. Frazão, “Fabry-Perot cavity based on a diaphragm-free hollow-core silica tube,” Opt. Lett. 36(20), 4029–4031 (2011). [CrossRef] [PubMed]
  7. Z. Ran, Y. J. Rao, J. Zhang, Z. Liu, and B. Xu, “A miniature fiber-optic refractive-index sensor based on laser-machined Fabry-Perot interfermmeter tip,” J. Lightwave Technol. 27(23), 5426–5429 (2009).
  8. H. Y. Choi, G. Mudhana, K. S. Park, U.-C. Paek, and B. H. Lee, “Cross-talk free and ultra-compact fiber optic sensor for simultaneous measurement of temperature and refractive index,” Opt. Express 18(1), 141–149 (2010). [CrossRef] [PubMed]
  9. K. Mileńko, D. J. Hu, P. P. Shum, T. Zhang, J. L. Lim, Y. Wang, T. R. Woliński, H. Wei, and W. Tong, “Photonic crystal fiber tip interferometer for refractive index sensing,” Opt. Lett. 37(8), 1373–1375 (2012). [CrossRef] [PubMed]
  10. Z. L. Ran, Y. J. Rao, W. J. Liu, X. Liao, and K. S. Chiang, “Laser-micromachined Fabry-Perot optical fiber tip sensor for high-resolution temperature-independent measurement of refractive index,” Opt. Express 16(3), 2252–2263 (2008). [CrossRef] [PubMed]
  11. K. M. Davis, K. Miura, N. Sugimoto, and K. Hirao, “Writing waveguides in glass with a femtosecond laser,” Opt. Lett. 21(21), 1729–1731 (1996). [CrossRef] [PubMed]
  12. W. J. Chen, S. M. Eaton, H. Zhang, and P. R. Herman, “Broadband directional couplers fabricated in bulk glass with high repetition rate femtosecond laser pulses,” Opt. Express 16(15), 11470–11480 (2008). [CrossRef] [PubMed]
  13. Y. Kondo, K. Nouchi, T. Mitsuyu, M. Watanabe, P. G. Kazansky, and K. Hirao, “Fabrication of long-period fiber gratings by focus irradiation of infrared femtosecond laser pulses,” Opt. Lett. 24(10), 646–648 (1999). [CrossRef] [PubMed]
  14. S. J. Mihailov, C. W. Smelser, P. Lu, R. B. Walker, D. Grobnic, H. Ding, G. Henderson, and J. Unruh, “Fiber Bragg gratings made with a phase mask and 800-nm femtosecond radiation,” Opt. Lett. 28(12), 995–997 (2003). [CrossRef] [PubMed]
  15. S. J. Liu, L. Jin, W. Jin, D. N. Wang, C. R. Liao, and Y. Wang, “Structural long period gratings made by drilling micro-holes in photonic crystal fibers with a femtosecond infrared laser,” Opt. Express 18(6), 5496–5503 (2010). [CrossRef] [PubMed]
  16. M. Park, S. Lee, W. Ha, D. K. Kim, W. Shin, I. B. Sohn, and K. Oh, “Ultracompact intrinsic micro air-cavity fiber Mach-Zehnder Interferometer,” IEEE Photon. Technol. Lett. 21(15), 1027–1029 (2009). [CrossRef]
  17. Y. Wang, M. W. Yang, D. N. Wang, S. J. Liu, and P. X. Lu, “Fiber in-line Mach-Zehnder interferometer fabricated by femtosecond laser micromachining for refractive index measurement with high sensitivity,” J. Opt. Soc. Am. B 27(3), 370–374 (2010). [CrossRef]
  18. J. Yang, L. Jiang, S. Wang, Q. Chen, B. Li, and H. Xiao, “Highly sensitive refractive index optical fiber sensors fabricated by a femtosecond laser,” IEEE Photonics J. 3(6), 1189–1197 (2011). [CrossRef]
  19. H. Y. Fu, K. M. Zhou, P. Saffari, C. B. Mou, L. Zhang, S. L. He, and I. Bennion, “Microchanneled chirped fiber Bragg grating formed by femtosecond laser aided chemical etching for refractive index and temperature measurements,” IEEE Photon. Technol. Lett. 20(19), 1609–1611 (2008). [CrossRef]
  20. X. Fang, C. R. Liao, and D. N. Wang, “Femtosecond laser fabricated fiber Bragg grating in microfiber for refractive index sensing,” Opt. Lett. 35(7), 1007–1009 (2010). [CrossRef] [PubMed]
  21. V. Bhatia and A. M. Vengsarkar, “Optical fiber long-period grating sensors,” Opt. Lett. 21(9), 692–694 (1996). [CrossRef] [PubMed]
  22. J. F. Ding, A. P. Zhang, L. Y. Shao, J. H. Yan, and S. L. He, “Fiber-taper seeded long-period grating pair as a highly sensitive refractive index sensor,” IEEE Photon. Technol. Lett. 17(6), 1247–1249 (2005). [CrossRef]
  23. R. Jha, J. Villatoro, G. Badenes, and V. Pruneri, “Refractometry based on a photonic crystal fiber interferometer,” Opt. Lett. 34(5), 617–619 (2009). [CrossRef] [PubMed]
  24. Z. B. Tian, S. S. H. Yam, and H. P. Loock, “Refractive index sensor based on an abrupt taper Michelson interferometer in a single-mode fiber,” Opt. Lett. 33(10), 1105–1107 (2008). [CrossRef] [PubMed]

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