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Proceedings Article

Polymer planar waveguide Bragg gratings: fabrication, characterization, and sensing applications

[+] Author Affiliations
M. Rosenberger, S. Hessler, M. Girschikofsky, G. L. Roth, B. Adelmann, R. Hellmann

Univ. of Applied Sciences Aschaffenburg (Germany)

H. Pauer, H. Woern

Karlsruhe Institute of Technology (Germany)

B. Schmauss

Univ. Erlangen-Nuremberg (Germany)

Proc. SPIE 10106, Integrated Optics: Devices, Materials, and Technologies XXI, 101061N (February 16, 2017); doi:10.1117/12.2249830
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From Conference Volume 10106

  • Integrated Optics: Devices, Materials, and Technologies XXI
  • Sonia M. García-Blanco; Gualtiero Nunzi Conti
  • San Francisco, California, United States | January 28, 2017

abstract

In this contribution, we give a comprehensive overview of the fabrication, characterization, and application of integrated planar waveguide Bragg gratings (PPBGs) in cyclo-olefin copolymers (COC). Starting with the measurement of the refractive index depth profile of integrated UV-written structures in COC by phase shifting Mach-Zehnder- Interferometry, we analyze the light propagation using numerical simulations. Furthermore, we show the rapid fabrication of humidity insensitive polymer waveguide Bragg gratings in cyclo-olefin copolymers and discuss the influence of the UV-dosage onto the spectral characteristics and the transmission behavior of the waveguide. Based on these measurements we exemplify that our Bragg gratings exhibit a reflectivity of over 99 % and are highly suitable for sensing applications. With regard to a negligible affinity to absorb water and in conjunction with high temperature stability these polymer devices are ideal for mechanical deformation sensing. Since planar structures are not limited to tensile but can also be applied for measuring compressive strain, we manufacture different functional devices and corroborate their applicability as optical sensors. Exemplarily, we highlight a temperature referenced PPBG sensor written into a femtosecond-laser cut tensile test geometry for tensile and compressive strain sensing. Furthermore, a flexible polymer planar shape sensor is presented. © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

M. Rosenberger ; S. Hessler ; H. Pauer ; M. Girschikofsky ; G. L. Roth, et al.
" Polymer planar waveguide Bragg gratings: fabrication, characterization, and sensing applications ", Proc. SPIE 10106, Integrated Optics: Devices, Materials, and Technologies XXI, 101061N (February 16, 2017); doi:10.1117/12.2249830; http://dx.doi.org/10.1117/12.2249830


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