Near infrared operation of femtosecond laser micro-machined in-fiber Mach Zehnder interferometers (uIMZI) for refractive index sensing

Monika Janik , Tinko Eftimov , Marcin Koba , Mateusz Jakub Śmietana , Wojtek J. Bock

Abstract

This paper discusses refractive index (n) measurement capabilities of interferometers based on micro-cavities of various diameters (d = 50 and 60 μm) fabricated in optical fibers by a femtosecond laser. In comparison to previously presented structures, the reported sensor operates in the near-infrared spectral range. Bottom of the cavity intersected the fiber’s core (5.2 μm in diameter), which induced the Mach-Zehnder interferometer effect. After filling the cavity, a set of minima can be observed in the transmission spectrum, and they shift in wavelength with a change in n. The fabricated sensors exhibit high and linear sensitivity and can measure sub-nanoliter volumes of liquids, what make this sensor perfect for various diagnostic medical or biochemical applications.
Author Monika Janik
Monika Janik,,
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, Tinko Eftimov
Tinko Eftimov,,
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, Marcin Koba
Marcin Koba,,
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, Mateusz Jakub Śmietana (FEIT / MO)
Mateusz Jakub Śmietana,,
- The Institute of Microelectronics and Optoelectronics
, Wojtek J. Bock
Wojtek J. Bock,,
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Pages1-5
Publication size in sheets0.5
Book Freymann Georg von, Schoenfeld Winston V., Rumpf Raymond C. (eds.): Proceedings on Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XI, vol. 10544, 2018, SPIE, ISBN 9781510615731, 120 p.
DOIDOI:10.1117/12.2291120
URL http://spie.org/Publications/Proceedings/Paper/10.1117/12.2291120
projectx. Project leader: Śmietana Mateusz Jakub, , Phone: (22) 234 63 64, start date 25-02-2015, planned end date 24-02-2018, IMIO/2015/NCN/1, Implemented
WEiTI Projects financed by NSC [Projekty finansowane przez NCN]
Languageen angielski
Score (nominal)15
ScoreMinisterial score = 15.0, 26-02-2018, BookChapterMatConf
Ministerial score (2013-2016) = 15.0, 26-02-2018, BookChapterMatConf
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