• Vol 6, No 4 (2015)
  • Electrical, Electronics, and Computer Engineering

Optimizing Coupling Region as Sensing Area in Optical Ring Resonator Sensor Applications

Purnomo Sidi Priambodo, Sasono Rahardjo, Gunawan Witjaksono, Djoko Hartanto

Corresponding email: pspriambodo@gmail.com


Published at : 27 Oct 2015
IJtech : IJtech Vol 6, No 4 (2015)
DOI : https://doi.org/10.14716/ijtech.v6i4.1271

Cite this article as:

Priambodo, P.S., Rahardjo, S.,Witjaksono, G., Hartanto, D., 2015. Optimizing Coupling Region as Sensing Area in Optical Ring Resonator Sensor Applications. International Journal of Technology. Volume 6(4), pp. 622-630

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Purnomo Sidi Priambodo Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok 16424, Indonesia
Sasono Rahardjo Agency for the Assessment and Application of Technology, Jalan M.H. Thamrin 8, Jakarta 10340, Indonesia
Gunawan Witjaksono Malaysian Institute of Microelectronic Systems, MIMOS Berhad, Technology Park Malaysia, Kuala Lumpur 57000, Malaysia
Djoko Hartanto Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok 16424, Indonesia
Email to Corresponding Author

Abstract
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Optical Ring Resonators (ORR), whether based on fiber optics or an optical micro ring on substrate structures have been studied and explored extensively to be used for optical sensor applications. The outstanding advantage of optical ring resonator structure is its spectral response shape change due to the variations of the refractive index of the surrounding medium, medium loss due to absorption and scattering, and coupling loss between waveguides in the optical ring structure. The change of spectral response due to the variations of optical medium on the optical ring structure is a phenomenon that can be used to sense the optical property change of physical or biological materials. Some developments of Waveguide (WG) ORR sensors are in progress mostly for bio-sensor applications, since it is free from Electromagnetic Interference (EMI) and is non-physically destructive. In this paper, we discuss our research in developing optical bio-sensor in the form of a WG optical ring resonator. The focus of the research is optimizing the coupling region as sensing area to obtain the optimal coupling coefficient for the most sensitive sense. The results show that the variations of coupling coefficient is not linear with respect to the resonant peak output, such that we are able to locate the most sensitive coupling coefficient to sense.

Optical bio-sensor, Optical Coupling, Optical Ring Resonator, Resonance, Spectral Response

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