Spectral tuning of a locally bent microfiber taper interferometer with a nanosized liquid crystal overlay

In this paper, the tuning characteristics of locally bent microfiber taper covered with a nanosized high-refractive-index liquid crystal (LC) layer under different temperatures and electric field intensities have been theoretically analyzed and experimentally investigated. A locally bent microfiber...

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Bibliographic Details
Published in:Applied optics (2004) 2016-09, Vol.55 (26), p.7393-7398
Main Authors: Luo, Haimei, Wang, Changjing, Ji, Yinghua, Yuan, Wen, Zhang, Guoping, Wang, Yifan, Hong, Zehua, Wang, Xianping
Format: Article
Language:English
Subjects:
Devices
Interferometers
Liquid crystals
Microfibers
Modulators
Nanostructure
Spectra
Tuning
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Summary:In this paper, the tuning characteristics of locally bent microfiber taper covered with a nanosized high-refractive-index liquid crystal (LC) layer under different temperatures and electric field intensities have been theoretically analyzed and experimentally investigated. A locally bent microfiber taper interferometer with a waist diameter of ∼3.72  μm is fabricated by using the flame brushing technique, followed by bending the transition region of the taper to form a modal interferometer and later by placing a ∼200  nm LC layer over the uniform taper waist region. Experimental results indicate that a high-efficiency thermal or electric tuning of an LC-coated locally bent microfiber taper interferometer could be achieved. This suggests a potential application of this device as tunable all-fiber photonic devices, such as filters, modulators, and sensing elements.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.55.007393