Optical sensors of bulk refractive index using optical fiber resonators

M. Eryürek; Y. Karadag; M. Ghafoor; N. Bavili; K. Cicek; A. Kiraz

doi:10.1117/12.2270740

16 May 2017 Optical sensors of bulk refractive index using optical fiber resonators

M. Eryürek, Y. Karadag, M. Ghafoor, N. Bavili, K. Cicek, A. Kiraz

Proceedings Volume 10231, Optical Sensors 2017; 102312U (2017) https://doi.org/10.1117/12.2270740
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

Optical fiber resonator (OFR) sensor is presented for bulk liquid refractive index (RI) sensing. The sensing mechanism relies on the spectral shifts of whispering gallery modes (WGMs) of OFRs which are excited using a tapered fiber. OFR liquid RI sensor is fully characterized using water solutions of ethanol and ethylene glycol (EG). A good agreement is achieved between the analytical calculations and experimental results for both TE and TM polarizations. The detection limit for bulk RI is calculated to be between 2.7 – 4.7 × 10⁻⁵ refractive index unit (RIU). The OFR sensor provides a robust, easy-to-fabricate and sensitive liquid refractive index sensor which can be employed in lab-on-a-chip applications.

Citation Download Citation

M. Eryürek, Y. Karadag, M. Ghafoor, N. Bavili, K. Cicek, and A. Kiraz "Optical sensors of bulk refractive index using optical fiber resonators", Proc. SPIE 10231, Optical Sensors 2017, 102312U (16 May 2017); https://doi.org/10.1117/12.2270740

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