1. Optical sensors of bulk refractive index using optical fiber resonators
- Author
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Yasin Karadag, Kenan Cicek, Alper Kiraz, Mustafa Eryürek, Nima Bavili, Moeen Ghafoor, Eryürek, Mustafa, Ghafoor, Moeen, Karadağ, Yasin, Kiraz, Alper (ORCID 0000-0001-7977-1286 & YÖK ID 22542), Baldini, Francesco, Bavili, N., Çiçek, K., Homola, Jiri, Lieberman, Robert A., College of Engineering, College of Sciences, Department of Electrical and Electronics Engineering, and Department of Physics
- Subjects
Microcavities ,Fiber resonator ,WGM ,Fiber tapering ,Optical sensor ,Liquid refractometry ,Ethanol ,Ethylene glycol ,Optical fiber ,Materials science ,business.industry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Graded-index fiber ,law.invention ,010309 optics ,Resonator ,Normalized frequency (fiber optics) ,Optics ,law ,Fiber optic sensor ,0103 physical sciences ,Whispering-gallery wave ,0210 nano-technology ,business ,Refractive index ,Photonic-crystal fiber ,Applied physics - 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 x 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., NA
- Published
- 2017