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Proceedings Article

Application of a silica-on-silicon planar optical waveguide Bragg grating sensor for organic liquid compound detection

[+] Author Affiliations
S. Scheurich, S. Belle, R. Hellmann

Univ. of Applied Sciences (Germany)

S. So, I. J. G. Sparrow, G. Emmerson

Stratophase Ltd. (United Kingdom)

Proc. SPIE 7356, Optical Sensors 2009, 73561B (May 18, 2009); doi:10.1117/12.820484
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From Conference Volume 7356

  • Optical Sensors 2009
  • Francesco Baldini; Jiri Homola; Robert A. Lieberman
  • Prague, Czech Republic | April 20, 2009

abstract

An evanescent field refractive index sensor consisting of a Bragg grating that is written into a silica-on-silicon planar optical waveguide structure by UV laser radiation is utilized to monitor the composition of liquid binary chemical systems. We have investigated various selected liquid compounds that are commonly used in the pharmaceutical and chemical industry, finding sensitivities on the order of 100nm/RIU and minimum detectable index resolution on the order of 5•10-6 fulfilling industrial demands on detection limits and partly being superior to other electrical transducer systems. The planar structure of the sensor chip allows on chip integration of fluidic structures that we have generated by laser ablation using a pulsed fiber laser, enabling connection to the adjacencies.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

S. Scheurich ; S. Belle ; R. Hellmann ; S. So ; I. J. G. Sparrow, et al.
"Application of a silica-on-silicon planar optical waveguide Bragg grating sensor for organic liquid compound detection", Proc. SPIE 7356, Optical Sensors 2009, 73561B (May 18, 2009); doi:10.1117/12.820484; http://dx.doi.org/10.1117/12.820484


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