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Design, integration and testing of a compact FBG interrogator, based on a AWG spectrometer

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Center for nano- and biophotonics (NB-Photonics)
Abstract
Fiber Bragg Grating or FBG sensors are gaining more and more interest in structural health monitoring of composite materials. Often, the weakest point in such a system is the ingress point of the fiber sensing chain into the composite material. For this reason we have developed a strongly miniaturized FBG interrogator unit with wireless power and data transmission, which can be incorporated in the composite structure. The interrogator is based on an arrayed waveguide grating (AWG) filter fabricated in a SOT technology, which is tailored in such a way to give large cross-talk between neighboring channels. The AWG signals are read by a linear 128 pixel In GaAs array flip-chipped on top of the Photonic Circuit (PIC). The spectrometer unit is completed with a ROTC mounted on the same substrate. The SLED and remaining electronics are integrated on a small and thin substrate and surrounded by the wireless antenna. The interrogator has an overall dimension of 100 mm diameter by max 7 mm height. The power dissipation of the electronics unit is limited to 1.5 W. The unit is capable of measuring strain values as low as 5 micro-strain.
Keywords
Compact Spectrometer, Strain sensor, Arrayed Waveguide Grating, Fiber Bragg Grating, STRAIN-SENSOR DEMODULATION, FIBER, GRATING SENSORS

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Citation

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MLA
Trita, Andrea, Garrie Vickers, Iker Mayordomo, et al. “Design, Integration and Testing of a Compact FBG Interrogator, Based on a AWG Spectrometer.” Proceedings of the Society of Photo-optical Instrumentation Engineers (spie). Ed. L Vivien et al. Vol. 9133. SPIE, 2014. Print.
APA
Trita, A., Vickers, G., Mayordomo, I., Van Thourhout, D., & Vermeiren, J. (2014). Design, integration and testing of a compact FBG interrogator, based on a AWG spectrometer. In L Vivien, S. Honkanen, L. Paves, & S. Pelli (Eds.), PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) (Vol. 9133). Presented at the 4th Conference on Silicon Photonics and Photonic Integrated Circuits, SPIE.
Chicago author-date
Trita, Andrea, Garrie Vickers, Iker Mayordomo, Dries Van Thourhout, and Jan Vermeiren. 2014. “Design, Integration and Testing of a Compact FBG Interrogator, Based on a AWG Spectrometer.” In Proceedings of the Society of Photo-optical Instrumentation Engineers (spie), ed. L Vivien, S Honkanen, L Paves, and S Pelli. Vol. 9133. SPIE.
Chicago author-date (all authors)
Trita, Andrea, Garrie Vickers, Iker Mayordomo, Dries Van Thourhout, and Jan Vermeiren. 2014. “Design, Integration and Testing of a Compact FBG Interrogator, Based on a AWG Spectrometer.” In Proceedings of the Society of Photo-optical Instrumentation Engineers (spie), ed. L Vivien, S Honkanen, L Paves, and S Pelli. Vol. 9133. SPIE.
Vancouver
1.
Trita A, Vickers G, Mayordomo I, Van Thourhout D, Vermeiren J. Design, integration and testing of a compact FBG interrogator, based on a AWG spectrometer. In: Vivien L, Honkanen S, Paves L, Pelli S, editors. PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE). SPIE; 2014.
IEEE
[1]
A. Trita, G. Vickers, I. Mayordomo, D. Van Thourhout, and J. Vermeiren, “Design, integration and testing of a compact FBG interrogator, based on a AWG spectrometer,” in PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE), Brussels, Belgium, 2014, vol. 9133.
@inproceedings{5756494,
  abstract     = {Fiber Bragg Grating or FBG sensors are gaining more and more interest in structural health monitoring of composite materials. Often, the weakest point in such a system is the ingress point of the fiber sensing chain into the composite material. For this reason we have developed a strongly miniaturized FBG interrogator unit with wireless power and data transmission, which can be incorporated in the composite structure. The interrogator is based on an arrayed waveguide grating (AWG) filter fabricated in a SOT technology, which is tailored in such a way to give large cross-talk between neighboring channels. The AWG signals are read by a linear 128 pixel In GaAs array flip-chipped on top of the Photonic Circuit (PIC). The spectrometer unit is completed with a ROTC mounted on the same substrate. The SLED and remaining electronics are integrated on a small and thin substrate and surrounded by the wireless antenna. The interrogator has an overall dimension of 100 mm diameter by max 7 mm height. The power dissipation of the electronics unit is limited to 1.5 W. The unit is capable of measuring strain values as low as 5 micro-strain.},
  articleno    = {91330D},
  author       = {Trita, Andrea and Vickers, Garrie and Mayordomo, Iker and Van Thourhout, Dries and Vermeiren, Jan},
  booktitle    = {PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)},
  editor       = {Vivien, L and Honkanen, S and Paves, L and Pelli, S },
  isbn         = {9781628410815},
  issn         = {0277-786X},
  keywords     = {Compact Spectrometer,Strain sensor,Arrayed Waveguide Grating,Fiber Bragg Grating,STRAIN-SENSOR DEMODULATION,FIBER,GRATING SENSORS},
  language     = {eng},
  location     = {Brussels, Belgium},
  pages        = {9},
  publisher    = {SPIE},
  title        = {Design, integration and testing of a compact FBG interrogator, based on a AWG spectrometer},
  url          = {http://dx.doi.org/10.1117/12.2058107},
  volume       = {9133},
  year         = {2014},
}

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