Spherical Glass Based Fiber Optic Fabry-Perot Interferometric Probe for Refractive Index Sensing

Optical fiber sensors of refractive index play important role in analysis of biological and chemical samples. This work presents a theoretical investigation of a spectral response of fiber optic microsphere with zinc-oxide (ZnO) thin film deposited on the surface and evaluates the prospect of using such structure for refractive index sensing. Microsphere is fabricated by optical fiber tapering method on the base of a single mode fiber. A numerical model is described and simulation was conducted to assess the influence of the ZnO layer deposition on a reflected signal. The results indicate that ZnO film improves the performance in terms of a potential application in refractive index sensor. Full Text: PDF ReferencesY. Qian, Y. Zhao, Q. Wu, Y. Yang, Review of salinity measurement technology based on optical fiber sensor, Sensors and Actuators B: Chemical, 260, 86–105 (2018). CrossRef M. Jędrzejewska-Szczerska, Response of a New Low-Coherence Fabry-Pérot Sensor to Hematocrit Levels in Human Blood, Sensors, 14, 4, 6965–6976, (2014). CrossRef F. Sequeira et al., Refractive Index Sensing with D-Shaped Plastic Optical Fibers for Chemical and Biochemical Applications, Sensors, 16, 12, 2119, (2016). CrossRef M. Jędrzejewska-Szczerska et al., ALD thin ZnO layer as an active medium in a fiber-optic Fabry–Pérot interferometer, Sensors and Actuators A: Physical, 221, 88–94, (2015). CrossRef M. Hirsch, D. Majchrowicz, P. Wierzba, M. Weber, M. Bechelany, M. Jędrzejewska-Szczerska, Low-Coherence Interferometric Fiber-Optic Sensors with Potential Applications as Biosensors, Sensors, 17, 2, 261, (2017). CrossRef M. Hirsch, P. Wierzba, M. Jędrzejewska-Szczerska, Application of thin dielectric films in low coherence fiber-optic Fabry-Pérot sensing interferometers: comparative study, Proc. SPIE 10161, 101610D (2016). CrossRef J. Pluciński, K. Karpienko, Fiber optic Fabry-Pérot sensors: modeling versus measurements results, Proc. SPIE 10034, 100340H (2016). CrossRef F. Goldsmith, Quasioptical systems: Gaussian beam quasioptical propagation and applications. (Piscataway, NJ: IEEE Press 1998). CrossRef

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SPR based fiber optic sensor for refractive index sensing with enhanced detection accuracy and figure of merit in visible region

Optics Communications ◽

10.1016/j.optcom.2015.01.043 ◽

2015 ◽

Vol 344 ◽

pp. 86-91 ◽

Cited By ~ 78

Author(s):

Akhilesh K. Mishra ◽

Satyendra K. Mishra ◽

Banshi D. Gupta

Keyword(s):

Refractive Index ◽

Figure Of Merit ◽

Fiber Optic ◽

Visible Region ◽

Fiber Optic Sensor ◽

Detection Accuracy ◽

Refractive Index Sensing ◽

Optic Sensor

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A Sensing Peak Identification Method for Fiber Extrinsic Fabry–Perot Interferometric Refractive Index Sensing

Sensors ◽

10.3390/s19010096 ◽

2018 ◽

Vol 19 (1) ◽

pp. 96 ◽

Cited By ~ 3

Author(s):

Bowen Yang ◽

Biyao Yang ◽

Ji Zhang ◽

Yiheng Yin ◽

Yanxiong Niu ◽

...

Keyword(s):

Refractive Index ◽

Measurement Accuracy ◽

Measurement Range ◽

Superior Performance ◽

Refractive Index Sensing ◽

Identification Method ◽

Peak Identification ◽

Fabry Perot ◽

High Measurement ◽

Lateral Offset

A novel sensing peak identification method for high accuracy refractive index (RI) sensing is proposed. The implementation takes the intensity of interference maximum as the characteristic to distinguish interference peaks, tracking the sensing peak continually during a RI changes, with high measurement accuracy and simple computation. To verify the effect of the method, the extrinsic Fabry–Perot interferometer (EFPI) sensor has been fabricated using the large lateral offset splicing technique. In the RI range from 1.346 to 1.388, the measurement range of the EFPI with the proposed method reaches at least 6 times larger than that of EFPI with the wavelength tracking method and the largest measurement error is −4.47 × 10−4. The EFPI refractive index (RI) sensor identified the sensing peak is believed to play an important role in RI, concentration and density sensing, etc., for superior performance.

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Preparation and Characterization of Microsphere ZnO ALD Coating Dedicated for the Fiber-Optic Refractive Index Sensor

Nanomaterials ◽

10.3390/nano9020306 ◽

2019 ◽

Vol 9 (2) ◽

pp. 306 ◽

Cited By ~ 7

Author(s):

Paulina Listewnik ◽

Marzena Hirsch ◽

Przemysław Struk ◽

Matthieu Weber ◽

Mikhael Bechelany ◽

...

Keyword(s):

Refractive Index ◽

Optical Fiber ◽

Fiber Optic ◽

Single Mode ◽

Atomic Layer ◽

Fiber Optic Sensor ◽

Refractive Index Sensor ◽

Layer Deposition ◽

Fabry Perot

We report the fabrication of a novel fiber-optic sensor device, based on the use of a microsphere conformally coated with a thin layer of zinc oxide (ZnO) by atomic layer deposition (ALD), and its use as a refractive index sensor. The microsphere was prepared on the tip of a single-mode optical fiber, on which a conformal ZnO thin film of 200 nm was deposited using an ALD process based on diethyl zinc (DEZ) and water at 100 °C. The modified fiber-optic microsphere was examined using scanning electron microscopy and Raman spectroscopy. Theoretical modeling has been carried out to assess the structure performance, and the performed experimental measurements carried out confirmed the enhanced sensing abilities when the microsphere was coated with a ZnO layer. The fabricated refractive index sensor was operating in a reflective mode of a Fabry–Pérot configuration, using a low coherent measurement system. The application of the ALD ZnO coating enabled for a better measurement of the refractive index of samples in the range of the refractive index allowed by the optical fiber. The proof-of-concept results presented in this work open prospects for the sensing community and will promote the use of fiber-optic sensing technologies.

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