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Proceedings Paper

Tuning refractive index sensing properties of micro-cavity in-line Mach-Zehnder interferometer with plasma etching
Author(s): Monika Janik; Marcin Koba; Wojtek J. Bock; Mateusz Śmietana
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Paper Abstract

This work presents an application of reactive ion etching (RIE) for an effective tuning of the spectral response and the refractive-index (RI) sensitivity of the micro-cavity in-line Mach-Zehnder interferometer (μIMZI). The μIMZIs were fabricated using femtosecond laser micromachining in a standard single-mode fiber as a form circular holes with a diameter of 54 μm. The application of RIE with SF6 and O2 used as reactive gas allows for an efficient and well controlled etching of the fabricated structure. The process resulted in cleaning the bottom of the micro-cavity and smoothening of its sidewalls. In transmission measurements, the effect of the plasma processing was observed as an increase in both spectral depths of the minima and RI sensitivity of the structure, as well as improved wettability of the micro-cavity surface, which made the measurements faster and easier.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103238M (23 April 2017); doi: 10.1117/12.2265755
Show Author Affiliations
Monika Janik, Univ. du Québec en Outaouais (Canada)
Marcin Koba, Warsaw Univ. of Technology (Poland)
National Institute of Telecommunications (Poland)
Wojtek J. Bock, Univ. du Québec en Outaouais (Canada)
Mateusz Śmietana, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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