Refractive Index Sensing by Phase Shift Cavity Ringdown Spectroscopy

Rana M. Armaghan Ayaz; Yigit Uysalli; Nima Bavili; Berna Morova; M. Imran Cheema; Alper Kiraz

doi:10.1007/978-94-024-2138-5_13

Refractive Index Sensing by Phase Shift Cavity Ringdown Spectroscopy

Rana M. Armaghan Ayaz, Yigit Uysalli, Nima Bavili, Berna Morova, M. Imran Cheema, Alper Kiraz^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

1 Citation (Scopus)

Abstract

Cavity ring down spectroscopy is a sensitive optical detection technique but it makes use of expensive electronics and data fitting algorithm. Both of these factors put a limitation on its performance for sensing applications. In this study cost effective and easy to use phase shift cavity ring down spectroscopy (PS-CRDS) technique, has been demonstrated for refractive index sensing. A refractive index sensor consisting of a tapered single mode optical fiber and two fiber Bragg gratings (FBGs) is proposed. In this sensing methodology, an intensity modulated laser beam centered at 1550 nm from a DFB laser is scanned at a narrow wavelength range and cavity modes are excited. Later the phase shift corresponding to these cavity modes is measured using a lock-in amplifier. Sucrose solutions of various concentrations are used for performance analysis of the refractive index sensing device. The resultant limit of detection (LOD) came out to be ~6.4 × 10⁻⁶ refractive index units (RIUs), which can be improved further by using thinner fiber tapers or fiber Bragg gratings with higher reflectivity.

Original language	English
Title of host publication	NATO Science for Peace and Security Series B
Subtitle of host publication	Physics and Biophysics
Publisher	Springer Science and Business Media B.V.
Pages	239-241
Number of pages	3
DOIs	https://doi.org/10.1007/978-94-024-2138-5_13
Publication status	Published - 2022
Externally published	Yes

Publication series

Name	NATO Science for Peace and Security Series B: Physics and Biophysics
ISSN (Print)	1874-6500
ISSN (Electronic)	1874-6535

Bibliographical note

Publisher Copyright:
© 2022, Springer Nature B.V.

Keywords

Fiber bragg gratings
Phase shift cavity ringdown spectroscopy
Refractive index
Tapered optical fiber

Access to Document

10.1007/978-94-024-2138-5_13

Cite this

Armaghan Ayaz, R. M., Uysalli, Y., Bavili, N., Morova, B., Cheema, M. I., & Kiraz, A. (2022). Refractive Index Sensing by Phase Shift Cavity Ringdown Spectroscopy. In NATO Science for Peace and Security Series B: Physics and Biophysics (pp. 239-241). (NATO Science for Peace and Security Series B: Physics and Biophysics). Springer Science and Business Media B.V.. https://doi.org/10.1007/978-94-024-2138-5_13

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abstract = "Cavity ring down spectroscopy is a sensitive optical detection technique but it makes use of expensive electronics and data fitting algorithm. Both of these factors put a limitation on its performance for sensing applications. In this study cost effective and easy to use phase shift cavity ring down spectroscopy (PS-CRDS) technique, has been demonstrated for refractive index sensing. A refractive index sensor consisting of a tapered single mode optical fiber and two fiber Bragg gratings (FBGs) is proposed. In this sensing methodology, an intensity modulated laser beam centered at 1550 nm from a DFB laser is scanned at a narrow wavelength range and cavity modes are excited. Later the phase shift corresponding to these cavity modes is measured using a lock-in amplifier. Sucrose solutions of various concentrations are used for performance analysis of the refractive index sensing device. The resultant limit of detection (LOD) came out to be \textasciitilde{}6.4 × 10−6 refractive index units (RIUs), which can be improved further by using thinner fiber tapers or fiber Bragg gratings with higher reflectivity.",

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Armaghan Ayaz, RM, Uysalli, Y, Bavili, N, Morova, B, Cheema, MI & Kiraz, A 2022, Refractive Index Sensing by Phase Shift Cavity Ringdown Spectroscopy. in NATO Science for Peace and Security Series B: Physics and Biophysics. NATO Science for Peace and Security Series B: Physics and Biophysics, Springer Science and Business Media B.V., pp. 239-241. https://doi.org/10.1007/978-94-024-2138-5_13

Refractive Index Sensing by Phase Shift Cavity Ringdown Spectroscopy. / Armaghan Ayaz, Rana M.; Uysalli, Yigit; Bavili, Nima et al.
NATO Science for Peace and Security Series B: Physics and Biophysics. Springer Science and Business Media B.V., 2022. p. 239-241 (NATO Science for Peace and Security Series B: Physics and Biophysics).

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

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AB - Cavity ring down spectroscopy is a sensitive optical detection technique but it makes use of expensive electronics and data fitting algorithm. Both of these factors put a limitation on its performance for sensing applications. In this study cost effective and easy to use phase shift cavity ring down spectroscopy (PS-CRDS) technique, has been demonstrated for refractive index sensing. A refractive index sensor consisting of a tapered single mode optical fiber and two fiber Bragg gratings (FBGs) is proposed. In this sensing methodology, an intensity modulated laser beam centered at 1550 nm from a DFB laser is scanned at a narrow wavelength range and cavity modes are excited. Later the phase shift corresponding to these cavity modes is measured using a lock-in amplifier. Sucrose solutions of various concentrations are used for performance analysis of the refractive index sensing device. The resultant limit of detection (LOD) came out to be ~6.4 × 10−6 refractive index units (RIUs), which can be improved further by using thinner fiber tapers or fiber Bragg gratings with higher reflectivity.

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Armaghan Ayaz RM, Uysalli Y, Bavili N, Morova B, Cheema MI, Kiraz A. Refractive Index Sensing by Phase Shift Cavity Ringdown Spectroscopy. In NATO Science for Peace and Security Series B: Physics and Biophysics. Springer Science and Business Media B.V. 2022. p. 239-241. (NATO Science for Peace and Security Series B: Physics and Biophysics). doi: 10.1007/978-94-024-2138-5_13

Refractive Index Sensing by Phase Shift Cavity Ringdown Spectroscopy

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