Abstract

Focused femtosecond laser pulses are used to create scattering damage in the core of polymer optical fibers (POF). The resulting structures are investigated regarding morphology by light microscopy and backscattered intensity using optical time domain reflectometry (OTDR). Quasi-distributed optical fiber sensing is proposed by evaluating backscatter changes at the inscribed scatter centers. Application examples for quasi-distributed measurement of fiber bends and temperature are demonstrated.

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  1. S. Liehr, P. Lenke, M. Wendt, K. Krebber, M. Seeger, E. Thiele, H. Metschies, B. Gebreselassie, J. C. Munich, "Polymer optical fiber sensors for distributed strain measurement and application in structural health monitoring," IEEE Sensors J. 9, 1330-1338 (2009).
  2. S. Liehr, M. Wendt, K. Krebber, "Distributed strain measurement in perfluorinated polymer optical fibres using optical frequency domain reflectometry," Meas. Sci. Technol. 21, 094023-1-094023-6 (2010).
  3. P. Lenke, M. Wendt, S. Liehr, K. Krebber, "Distributed humidity sensing based on Rayleigh scattering in polymer optical fibers," Proc. SPIE (2010) pp. 76533X-76533X-4.
  4. S. Liehr, P. Lenke, K. Krebber, M. Seeger, E. Thiele, H. Metschies, B. Gebreselassie, J. C. Münich, L. Stempniewski, "Distributed strain measurement with polymer optical fibers integrated into multifunctional geotextiles," Proc. SPIE (2008) pp. 700302-700302-15.
  5. L. Bilro, J. G. Oliveira, J. L. Pinto, R. N. Nogueira, "POF metrology in physics medicine and rehabilitation," Proc. SPIE (2010) pp. 76531T-76531T-4.
  6. N. Nurgiyatna, P. Scully, K. B. Ozanyan, "Grooved fiber sensors for deformation imaging," Proc. 2010 IEEE Sens. (2010) pp. 1675-1680.
  7. Y. Fu, H. Di, R. Liu, "Light intensity modulation fiber-optic sensor for curvature measurement," Opt. Laser Technol. 42, 594-599 (2010).
  8. K. S. C. Kuang, W. J. Cantwell, P. J. Scully, "An evaluation of a novel plastic optical fibre sensor for axial strain and bend measurements," Meas. Sci. Technol. 13, 1523-1534 (2002).
  9. M. Lomer, A. Quintela, M. López-Amo, J. Zubia, J. M. López-Higuera, "A quasi-distributed level sensor based on a bent side-polished plastic optical fibre cable," Meas. Sci. Technol. 18, 2261-2267 (2007).
  10. S. Liehr, J. Burgmeier, W. Schade, K. Krebber, "Fiber optic bend and temperature sensing in femtosecond laser-structured POF," Proc. SPIE (2012) pp. 84213I-84213I-4.
  11. B. C. Stuart, M. D. Feit, S. Herman, A. M. Rubenchik, B. W. Shore, M. D. Perry, "Optical ablation by high-power short-pulse lasers," J. Opt. Soc. Amer. B 13, 459-468 (1996).
  12. D. von der Linde, K. Sokolowski-Tinten, J. Bialkowski, "Laser-solid interaction in the femtosecond time regime," Appl. Surf. Sci. 109–110, 1-10 (1997).
  13. R. R. Gattass, E. Mazur, "Femtosecond laser micromachining in transparent materials," Nature Photon. 2, 219-225 (2008).
  14. S. Sowa, W. Watanabe, T. Tamaki, J. Nishii, K. Itoh, "Symmetric waveguides in poly(methyl methacrylate) fabricated by femtosecond laser pulses," Opt. Exp. 14, 291-297 (2006).
  15. D. F. Farson, "Femtosecond laser bulk micromachining of microfluid channels in poly(methylmethacrylate)," J. Laser Appl. 18, 210 (2006).
  16. E. N. Glezer, E. Mazur, "Ultrafast-laser driven micro-explosions in transparent materials," Appl. Phys. Lett. 71, 882-884 (1997).
  17. E. N. Glezer, M. Milosavljevic, L. Huang, R. J. Finlay, T.-H. Her, J. P. Callan, E. Mazur, "Three-dimensional optical storage inside transparent materials," Opt. Lett. 21, 2023-2025 (1996).
  18. C. B. Schaffer, A. O. Jamison, E. Mazur, "Morphology of femtosecond laser-induced structural changes in bulk transparent materials," Appl. Phys. Lett. 84, 1441-1443 (2004).
  19. E. Toratani, M. Kamata, M. Obara, "Self-fabrication of void array in fused silica by femtosecond laser processing," Appl. Phys. Lett. 87, 171103-171103-3 (2005).
  20. S. Sowa, W. Watanabe, J. Nishii, K. Itoh, "Filamentary cavity formation in poly(methyl methacrylate) by single femtosecond pulse," Appl. Phys. A 81, 1587-1590 (2005).
  21. M. Terakawa, E. Toratani, T. Shirakawa, M. Obara, "Fabrication of a void array in dielectric materials by femtosecond laser micro-processing for compact photonic devices," Appl. Phys. A 100, 1041-1047 (2010).
  22. J. Krüger, W. Kautek, "Ultrashort pulse laser interaction with dielectrics and polymers," Adv. Polymer Sci. 168, 247-289 (2004).
  23. S. Baudach, J. Bonse, J. Krüger, W. Kautek, "Ultrashort pulse laser ablation of polycarbonate and polymethylmethacrylate," Appl. Surf. Sci. 154–155, 555-560 (2000).
  24. A. Baum, W. Perrie, P. J. Scully, M. Basanta, C. L. Thomas, N. J. Goddard, P. R. Fielden, P. Chalker, "Refractive index structures in poly(methyl methacrylate) and polymer optical fibre by femtosecond laser irradiation," Opt. Fiber Sens. TuE25 (2006).
  25. P. J. Scully, D. Jones, D. A. Jaroszynski, "Femtosecond laser irradiation of polymethylmethacrylate for refractive index gratings," J. Opt. A: Pure Appl. Opt. 5, S92-S96 (2003).
  26. M. Stecher, R. J. Williams, O. Bang, G. D. Marshall, M. J. Whitford, G. Town, "Periodic refractive index modifications inscribed in polymer optical fibre by focused IR femtosecond pulses," Proc. 18th Int. Conf. POF (2009).
  27. S. J. Liang, P. J. Scully, J. Schille, J. Vaughan, W. Perrie, "Femtosecond laser induced refractive index structures in polymer optical fibre (POF) for sensing," Proc. SPIE (2009) pp. 75036S-75036S-4.
  28. S. Liang, P. J. Scully, J. Schille, J. Vaughan, M. Benyezzar, D. Liu, W. Perrie, "Writing parameters for 3-D refractive index structures in polymethyl methacrylate using femtosecond radiation at 400 nm," J. Laser Micro Nanoeng. 5, 68-73 (2010).
  29. A. Baum, P. J. Scully, W. Perrie, D. Liu, V. Lucarini, "Mechanisms of femtosecond laser-induced refractive index modification of poly(methyl methacrylate)," J. Opt. Soc. Amer. B 27, 107-111 (2010).
  30. A. Stefani, M. Stecher, G. E. Town, O. Bang, "Direct writing of fiber Bragg grating in microstructured polymer optical fiber," IEEE Photon. Technol. Lett. 24, 1148-1150 (2012).
  31. W. Yuan, L. Khan, D. J. Webb, K. Kalli, H. K. Rasmussen, A. Stefani, O. Bang, "Humidity insensitive TOPAS polymer fiber Bragg grating sensor," Opt. Exp. 19, 19731-19739 (2011).
  32. O. Matoba, Y. Kitamura, T. Manabe, K. Nitta, W. Watanabe, "Fabrication of controlled volume scattering medium in poly(methyl methacrylate) by focused femtosecond laser pulses," Appl. Phys. Lett. 95, 1114-1114-3 (2009).
  33. S. E. Golowich, W. White, W. A. Reed, E. Knudsen, "Quantitative estimates of mode coupling and differential modal attenuation in perfluorinated graded-index plastic optical fiber," J. Lightw. Technol. 21, 111-121 (2003).
  34. S. Liehr, K. Krebber, "Application of quasi-distributed and dynamic length and power change measurement using optical frequency domain reflectometry," IEEE Sens. J. 12, 237-245 (2012).
  35. A. Djordjevich, M. Fung, R. Y. K. Fung, "Principles of deflection-curvature measurement," Meas. Sci. Technol. 12, 1983-1989 (2001).
  36. Y. Fu, H. Di, "Fiber-optic curvature sensor with optimized sensitive zone," Opt. Laser Technol. 43, 586-591 (2011).
  37. A. Hartog, "A distributed temperature sensor based on liquid-core optical fibers," J. Lightw. Technol. 1, 498-509 (1983).
  38. W. N. MacPherson, M. J. Gander, R. McBride, J. D. C. Jones, P. M. Blanchard, J. G. Burnett, A. H. Greenaway, B. Mangan, T. A. Birks, J. C. Knight, P. S. J. Russell, "Remotely addressed optical fibre curvature sensor using multicore photonic crystal fibre," Opt. Commun. 193, 97-104 (2001).
  39. K. Ni, T. Li, L. Hu, W. Qian, Q. Zhang, S. Jin, "Temperature-independent curvature sensor based on tapered photonic crystal fiber interferometer," Opt. Commun. 285, 5148-5150 (2012).
  40. A. Martinez, Y. Lai, M. Dubov, I. Y. Khrushchev, I. Bennion, "Vector bending sensors based on fibre Bragg gratings inscribed by infrared femtosecond laser," Electron. Lett. 41, 472-474 (2005).
  41. H. J. Patrick, C. Chang, S. T. Vohra, "Long period fibre gratings for structural bend sensing," Electron. Lett. 34, 1773-1775 (1998).
  42. Y. Liu, J. A. R. Williams, I. Bennion, "Optical bend sensor based on measurement of resonance mode splitting of long-period fiber grating," IEEE Photon. Technol. Lett. 12, 531-533 (2000).
  43. C. De Marco, S. M. Eaton, R. Suriano, S. Turri, M. Levi, R. Ramponi, G. Cerullo, R. Osellame, "Surface properties of femtosecond laser ablated PMMA," ACS Appl. Mater. Interf. 2, 2377-2384 (2010).

2012 (3)

A. Stefani, M. Stecher, G. E. Town, O. Bang, "Direct writing of fiber Bragg grating in microstructured polymer optical fiber," IEEE Photon. Technol. Lett. 24, 1148-1150 (2012).

S. Liehr, K. Krebber, "Application of quasi-distributed and dynamic length and power change measurement using optical frequency domain reflectometry," IEEE Sens. J. 12, 237-245 (2012).

K. Ni, T. Li, L. Hu, W. Qian, Q. Zhang, S. Jin, "Temperature-independent curvature sensor based on tapered photonic crystal fiber interferometer," Opt. Commun. 285, 5148-5150 (2012).

2011 (2)

Y. Fu, H. Di, "Fiber-optic curvature sensor with optimized sensitive zone," Opt. Laser Technol. 43, 586-591 (2011).

W. Yuan, L. Khan, D. J. Webb, K. Kalli, H. K. Rasmussen, A. Stefani, O. Bang, "Humidity insensitive TOPAS polymer fiber Bragg grating sensor," Opt. Exp. 19, 19731-19739 (2011).

2010 (6)

M. Terakawa, E. Toratani, T. Shirakawa, M. Obara, "Fabrication of a void array in dielectric materials by femtosecond laser micro-processing for compact photonic devices," Appl. Phys. A 100, 1041-1047 (2010).

S. Liang, P. J. Scully, J. Schille, J. Vaughan, M. Benyezzar, D. Liu, W. Perrie, "Writing parameters for 3-D refractive index structures in polymethyl methacrylate using femtosecond radiation at 400 nm," J. Laser Micro Nanoeng. 5, 68-73 (2010).

A. Baum, P. J. Scully, W. Perrie, D. Liu, V. Lucarini, "Mechanisms of femtosecond laser-induced refractive index modification of poly(methyl methacrylate)," J. Opt. Soc. Amer. B 27, 107-111 (2010).

C. De Marco, S. M. Eaton, R. Suriano, S. Turri, M. Levi, R. Ramponi, G. Cerullo, R. Osellame, "Surface properties of femtosecond laser ablated PMMA," ACS Appl. Mater. Interf. 2, 2377-2384 (2010).

S. Liehr, M. Wendt, K. Krebber, "Distributed strain measurement in perfluorinated polymer optical fibres using optical frequency domain reflectometry," Meas. Sci. Technol. 21, 094023-1-094023-6 (2010).

Y. Fu, H. Di, R. Liu, "Light intensity modulation fiber-optic sensor for curvature measurement," Opt. Laser Technol. 42, 594-599 (2010).

2009 (2)

S. Liehr, P. Lenke, M. Wendt, K. Krebber, M. Seeger, E. Thiele, H. Metschies, B. Gebreselassie, J. C. Munich, "Polymer optical fiber sensors for distributed strain measurement and application in structural health monitoring," IEEE Sensors J. 9, 1330-1338 (2009).

O. Matoba, Y. Kitamura, T. Manabe, K. Nitta, W. Watanabe, "Fabrication of controlled volume scattering medium in poly(methyl methacrylate) by focused femtosecond laser pulses," Appl. Phys. Lett. 95, 1114-1114-3 (2009).

2008 (1)

R. R. Gattass, E. Mazur, "Femtosecond laser micromachining in transparent materials," Nature Photon. 2, 219-225 (2008).

2007 (1)

M. Lomer, A. Quintela, M. López-Amo, J. Zubia, J. M. López-Higuera, "A quasi-distributed level sensor based on a bent side-polished plastic optical fibre cable," Meas. Sci. Technol. 18, 2261-2267 (2007).

2006 (3)

S. Sowa, W. Watanabe, T. Tamaki, J. Nishii, K. Itoh, "Symmetric waveguides in poly(methyl methacrylate) fabricated by femtosecond laser pulses," Opt. Exp. 14, 291-297 (2006).

D. F. Farson, "Femtosecond laser bulk micromachining of microfluid channels in poly(methylmethacrylate)," J. Laser Appl. 18, 210 (2006).

A. Baum, W. Perrie, P. J. Scully, M. Basanta, C. L. Thomas, N. J. Goddard, P. R. Fielden, P. Chalker, "Refractive index structures in poly(methyl methacrylate) and polymer optical fibre by femtosecond laser irradiation," Opt. Fiber Sens. TuE25 (2006).

2005 (3)

E. Toratani, M. Kamata, M. Obara, "Self-fabrication of void array in fused silica by femtosecond laser processing," Appl. Phys. Lett. 87, 171103-171103-3 (2005).

S. Sowa, W. Watanabe, J. Nishii, K. Itoh, "Filamentary cavity formation in poly(methyl methacrylate) by single femtosecond pulse," Appl. Phys. A 81, 1587-1590 (2005).

A. Martinez, Y. Lai, M. Dubov, I. Y. Khrushchev, I. Bennion, "Vector bending sensors based on fibre Bragg gratings inscribed by infrared femtosecond laser," Electron. Lett. 41, 472-474 (2005).

2004 (2)

C. B. Schaffer, A. O. Jamison, E. Mazur, "Morphology of femtosecond laser-induced structural changes in bulk transparent materials," Appl. Phys. Lett. 84, 1441-1443 (2004).

J. Krüger, W. Kautek, "Ultrashort pulse laser interaction with dielectrics and polymers," Adv. Polymer Sci. 168, 247-289 (2004).

2003 (2)

P. J. Scully, D. Jones, D. A. Jaroszynski, "Femtosecond laser irradiation of polymethylmethacrylate for refractive index gratings," J. Opt. A: Pure Appl. Opt. 5, S92-S96 (2003).

S. E. Golowich, W. White, W. A. Reed, E. Knudsen, "Quantitative estimates of mode coupling and differential modal attenuation in perfluorinated graded-index plastic optical fiber," J. Lightw. Technol. 21, 111-121 (2003).

2002 (1)

K. S. C. Kuang, W. J. Cantwell, P. J. Scully, "An evaluation of a novel plastic optical fibre sensor for axial strain and bend measurements," Meas. Sci. Technol. 13, 1523-1534 (2002).

2001 (2)

W. N. MacPherson, M. J. Gander, R. McBride, J. D. C. Jones, P. M. Blanchard, J. G. Burnett, A. H. Greenaway, B. Mangan, T. A. Birks, J. C. Knight, P. S. J. Russell, "Remotely addressed optical fibre curvature sensor using multicore photonic crystal fibre," Opt. Commun. 193, 97-104 (2001).

A. Djordjevich, M. Fung, R. Y. K. Fung, "Principles of deflection-curvature measurement," Meas. Sci. Technol. 12, 1983-1989 (2001).

2000 (2)

S. Baudach, J. Bonse, J. Krüger, W. Kautek, "Ultrashort pulse laser ablation of polycarbonate and polymethylmethacrylate," Appl. Surf. Sci. 154–155, 555-560 (2000).

Y. Liu, J. A. R. Williams, I. Bennion, "Optical bend sensor based on measurement of resonance mode splitting of long-period fiber grating," IEEE Photon. Technol. Lett. 12, 531-533 (2000).

1998 (1)

H. J. Patrick, C. Chang, S. T. Vohra, "Long period fibre gratings for structural bend sensing," Electron. Lett. 34, 1773-1775 (1998).

1997 (2)

D. von der Linde, K. Sokolowski-Tinten, J. Bialkowski, "Laser-solid interaction in the femtosecond time regime," Appl. Surf. Sci. 109–110, 1-10 (1997).

E. N. Glezer, E. Mazur, "Ultrafast-laser driven micro-explosions in transparent materials," Appl. Phys. Lett. 71, 882-884 (1997).

1996 (2)

E. N. Glezer, M. Milosavljevic, L. Huang, R. J. Finlay, T.-H. Her, J. P. Callan, E. Mazur, "Three-dimensional optical storage inside transparent materials," Opt. Lett. 21, 2023-2025 (1996).

B. C. Stuart, M. D. Feit, S. Herman, A. M. Rubenchik, B. W. Shore, M. D. Perry, "Optical ablation by high-power short-pulse lasers," J. Opt. Soc. Amer. B 13, 459-468 (1996).

1983 (1)

A. Hartog, "A distributed temperature sensor based on liquid-core optical fibers," J. Lightw. Technol. 1, 498-509 (1983).

ACS Appl. Mater. Interf. (1)

C. De Marco, S. M. Eaton, R. Suriano, S. Turri, M. Levi, R. Ramponi, G. Cerullo, R. Osellame, "Surface properties of femtosecond laser ablated PMMA," ACS Appl. Mater. Interf. 2, 2377-2384 (2010).

Adv. Polymer Sci. (1)

J. Krüger, W. Kautek, "Ultrashort pulse laser interaction with dielectrics and polymers," Adv. Polymer Sci. 168, 247-289 (2004).

Appl. Phys. A (1)

S. Sowa, W. Watanabe, J. Nishii, K. Itoh, "Filamentary cavity formation in poly(methyl methacrylate) by single femtosecond pulse," Appl. Phys. A 81, 1587-1590 (2005).

Appl. Phys. Lett. (2)

C. B. Schaffer, A. O. Jamison, E. Mazur, "Morphology of femtosecond laser-induced structural changes in bulk transparent materials," Appl. Phys. Lett. 84, 1441-1443 (2004).

E. Toratani, M. Kamata, M. Obara, "Self-fabrication of void array in fused silica by femtosecond laser processing," Appl. Phys. Lett. 87, 171103-171103-3 (2005).

Appl. Phys. A (1)

M. Terakawa, E. Toratani, T. Shirakawa, M. Obara, "Fabrication of a void array in dielectric materials by femtosecond laser micro-processing for compact photonic devices," Appl. Phys. A 100, 1041-1047 (2010).

Appl. Phys. Lett. (2)

E. N. Glezer, E. Mazur, "Ultrafast-laser driven micro-explosions in transparent materials," Appl. Phys. Lett. 71, 882-884 (1997).

O. Matoba, Y. Kitamura, T. Manabe, K. Nitta, W. Watanabe, "Fabrication of controlled volume scattering medium in poly(methyl methacrylate) by focused femtosecond laser pulses," Appl. Phys. Lett. 95, 1114-1114-3 (2009).

Appl. Surf. Sci. (2)

S. Baudach, J. Bonse, J. Krüger, W. Kautek, "Ultrashort pulse laser ablation of polycarbonate and polymethylmethacrylate," Appl. Surf. Sci. 154–155, 555-560 (2000).

D. von der Linde, K. Sokolowski-Tinten, J. Bialkowski, "Laser-solid interaction in the femtosecond time regime," Appl. Surf. Sci. 109–110, 1-10 (1997).

Electron. Lett. (2)

A. Martinez, Y. Lai, M. Dubov, I. Y. Khrushchev, I. Bennion, "Vector bending sensors based on fibre Bragg gratings inscribed by infrared femtosecond laser," Electron. Lett. 41, 472-474 (2005).

H. J. Patrick, C. Chang, S. T. Vohra, "Long period fibre gratings for structural bend sensing," Electron. Lett. 34, 1773-1775 (1998).

IEEE Photon. Technol. Lett. (1)

A. Stefani, M. Stecher, G. E. Town, O. Bang, "Direct writing of fiber Bragg grating in microstructured polymer optical fiber," IEEE Photon. Technol. Lett. 24, 1148-1150 (2012).

IEEE Sensors J. (1)

S. Liehr, P. Lenke, M. Wendt, K. Krebber, M. Seeger, E. Thiele, H. Metschies, B. Gebreselassie, J. C. Munich, "Polymer optical fiber sensors for distributed strain measurement and application in structural health monitoring," IEEE Sensors J. 9, 1330-1338 (2009).

IEEE Photon. Technol. Lett. (1)

Y. Liu, J. A. R. Williams, I. Bennion, "Optical bend sensor based on measurement of resonance mode splitting of long-period fiber grating," IEEE Photon. Technol. Lett. 12, 531-533 (2000).

IEEE Sens. J. (1)

S. Liehr, K. Krebber, "Application of quasi-distributed and dynamic length and power change measurement using optical frequency domain reflectometry," IEEE Sens. J. 12, 237-245 (2012).

J. Laser Appl. (1)

D. F. Farson, "Femtosecond laser bulk micromachining of microfluid channels in poly(methylmethacrylate)," J. Laser Appl. 18, 210 (2006).

J. Laser Micro Nanoeng. (1)

S. Liang, P. J. Scully, J. Schille, J. Vaughan, M. Benyezzar, D. Liu, W. Perrie, "Writing parameters for 3-D refractive index structures in polymethyl methacrylate using femtosecond radiation at 400 nm," J. Laser Micro Nanoeng. 5, 68-73 (2010).

J. Lightw. Technol. (1)

A. Hartog, "A distributed temperature sensor based on liquid-core optical fibers," J. Lightw. Technol. 1, 498-509 (1983).

J. Lightw. Technol. (1)

S. E. Golowich, W. White, W. A. Reed, E. Knudsen, "Quantitative estimates of mode coupling and differential modal attenuation in perfluorinated graded-index plastic optical fiber," J. Lightw. Technol. 21, 111-121 (2003).

J. Opt. A: Pure Appl. Opt. (1)

P. J. Scully, D. Jones, D. A. Jaroszynski, "Femtosecond laser irradiation of polymethylmethacrylate for refractive index gratings," J. Opt. A: Pure Appl. Opt. 5, S92-S96 (2003).

J. Opt. Soc. Amer. B (2)

A. Baum, P. J. Scully, W. Perrie, D. Liu, V. Lucarini, "Mechanisms of femtosecond laser-induced refractive index modification of poly(methyl methacrylate)," J. Opt. Soc. Amer. B 27, 107-111 (2010).

B. C. Stuart, M. D. Feit, S. Herman, A. M. Rubenchik, B. W. Shore, M. D. Perry, "Optical ablation by high-power short-pulse lasers," J. Opt. Soc. Amer. B 13, 459-468 (1996).

Meas. Sci. Technol. (4)

K. S. C. Kuang, W. J. Cantwell, P. J. Scully, "An evaluation of a novel plastic optical fibre sensor for axial strain and bend measurements," Meas. Sci. Technol. 13, 1523-1534 (2002).

M. Lomer, A. Quintela, M. López-Amo, J. Zubia, J. M. López-Higuera, "A quasi-distributed level sensor based on a bent side-polished plastic optical fibre cable," Meas. Sci. Technol. 18, 2261-2267 (2007).

S. Liehr, M. Wendt, K. Krebber, "Distributed strain measurement in perfluorinated polymer optical fibres using optical frequency domain reflectometry," Meas. Sci. Technol. 21, 094023-1-094023-6 (2010).

A. Djordjevich, M. Fung, R. Y. K. Fung, "Principles of deflection-curvature measurement," Meas. Sci. Technol. 12, 1983-1989 (2001).

Nature Photon. (1)

R. R. Gattass, E. Mazur, "Femtosecond laser micromachining in transparent materials," Nature Photon. 2, 219-225 (2008).

Opt. Exp. (1)

S. Sowa, W. Watanabe, T. Tamaki, J. Nishii, K. Itoh, "Symmetric waveguides in poly(methyl methacrylate) fabricated by femtosecond laser pulses," Opt. Exp. 14, 291-297 (2006).

Opt. Commun. (2)

W. N. MacPherson, M. J. Gander, R. McBride, J. D. C. Jones, P. M. Blanchard, J. G. Burnett, A. H. Greenaway, B. Mangan, T. A. Birks, J. C. Knight, P. S. J. Russell, "Remotely addressed optical fibre curvature sensor using multicore photonic crystal fibre," Opt. Commun. 193, 97-104 (2001).

K. Ni, T. Li, L. Hu, W. Qian, Q. Zhang, S. Jin, "Temperature-independent curvature sensor based on tapered photonic crystal fiber interferometer," Opt. Commun. 285, 5148-5150 (2012).

Opt. Exp. (1)

W. Yuan, L. Khan, D. J. Webb, K. Kalli, H. K. Rasmussen, A. Stefani, O. Bang, "Humidity insensitive TOPAS polymer fiber Bragg grating sensor," Opt. Exp. 19, 19731-19739 (2011).

Opt. Fiber Sens. (1)

A. Baum, W. Perrie, P. J. Scully, M. Basanta, C. L. Thomas, N. J. Goddard, P. R. Fielden, P. Chalker, "Refractive index structures in poly(methyl methacrylate) and polymer optical fibre by femtosecond laser irradiation," Opt. Fiber Sens. TuE25 (2006).

Opt. Laser Technol. (2)

Y. Fu, H. Di, "Fiber-optic curvature sensor with optimized sensitive zone," Opt. Laser Technol. 43, 586-591 (2011).

Y. Fu, H. Di, R. Liu, "Light intensity modulation fiber-optic sensor for curvature measurement," Opt. Laser Technol. 42, 594-599 (2010).

Opt. Lett. (1)

Other (7)

S. Liehr, J. Burgmeier, W. Schade, K. Krebber, "Fiber optic bend and temperature sensing in femtosecond laser-structured POF," Proc. SPIE (2012) pp. 84213I-84213I-4.

P. Lenke, M. Wendt, S. Liehr, K. Krebber, "Distributed humidity sensing based on Rayleigh scattering in polymer optical fibers," Proc. SPIE (2010) pp. 76533X-76533X-4.

S. Liehr, P. Lenke, K. Krebber, M. Seeger, E. Thiele, H. Metschies, B. Gebreselassie, J. C. Münich, L. Stempniewski, "Distributed strain measurement with polymer optical fibers integrated into multifunctional geotextiles," Proc. SPIE (2008) pp. 700302-700302-15.

L. Bilro, J. G. Oliveira, J. L. Pinto, R. N. Nogueira, "POF metrology in physics medicine and rehabilitation," Proc. SPIE (2010) pp. 76531T-76531T-4.

N. Nurgiyatna, P. Scully, K. B. Ozanyan, "Grooved fiber sensors for deformation imaging," Proc. 2010 IEEE Sens. (2010) pp. 1675-1680.

M. Stecher, R. J. Williams, O. Bang, G. D. Marshall, M. J. Whitford, G. Town, "Periodic refractive index modifications inscribed in polymer optical fibre by focused IR femtosecond pulses," Proc. 18th Int. Conf. POF (2009).

S. J. Liang, P. J. Scully, J. Schille, J. Vaughan, W. Perrie, "Femtosecond laser induced refractive index structures in polymer optical fibre (POF) for sensing," Proc. SPIE (2009) pp. 75036S-75036S-4.

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