Simultaneous measurement of strain and temperature by employing fiber Mach-Zehnder interferometer.
Opt Express
; 22(2): 1680-6, 2014 Jan 27.
Article
em En
| MEDLINE
| ID: mdl-24515175
We demonstrated a novel fiber in-line Mach-Zehnder interferometer (MZI) with a large fringe visibility of up to 17 dB, which was fabricated by misaligned splicing a short section of thin core fiber between two sections of standard single-mode fiber. Such a MZI could be used to realize simultaneous measurement of tensile strain and temperature. Tensile strain was measured with an ultrahigh sensitivity of -0.023 dB/µÉ via the intensity modulation of interference fringes, and temperature was measured with a high sensitivity of 51 pm/°C via the wavelength modulation of interference fringe. That is, the MZI-based sensor overcomes the cross-sensitivity problem between tensile strain and temperature by means of different demodulation methods. Moreover, this proposed sensor exhibits the advantages of low-cost, extremely simple structure, compact size (only about 10 mm), and good repeatability.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Refratometria
/
Transdutores
/
Teste de Materiais
/
Termografia
/
Interferometria
/
Manometria
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article