Fiber refractive index sensor based on dual polarized Mach-Zehnder interference caused by a single-mode fiber loop.
Appl Opt
; 55(1): 63-9, 2016 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-26835622
ABSTRACT
A novel refractive index (RI) sensor head is proposed and experimentally demonstrated in this paper. The proposed sensor head is composed of a segment of bared single-mode fiber and a fiber holder that is fabricated by a 3D printer. The mechanism of the sensor head is based on dual polarized Mach-Zehnder interference. According to the aforementioned mechanism, we derived that the RI responses of the resonance dips possess an exponential functional manner when the E field is along the fast or slow axes. In addition, based on the finite element method, we found that the resonance dips wavelength responses are more sensitive when the input E field is along the fast axis. A confirmation experiment was performed, and the results confirmed our hypothesis. The maximum arithmetic mean value of RI response is about 657.895 nm/RIU for the proposed sensor head when the ambient RI changes from 1.3350 to 1.4110. Moreover, in the case of the proposed liquid RI sensor head, aligning the E field along the fast axis is the potentially needed condition for polarization.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Refratometria
/
Fibras Ópticas
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Tecnologia de Fibra Óptica
/
Interferometria
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article