Fiber-optic bend sensor using LP21 mode operation.
Opt Express
; 20(24): 26127-34, 2012 Nov 19.
Article
em En
| MEDLINE
| ID: mdl-23187468
ABSTRACT
A novel fiber-optic bending sensor based upon the propagation of LP21 mode is demonstrated. The sensor, comprised of an S-bend fiber on an elastic film, measures LP21 mode specklegram rotation, which increments linearly with bending angle by the stress-optic effect. The sensor is capable of experimentally achieving a sensitivity as high as 4.13 rad/m(-1). The theoretical analysis of the sensor, which is a combination of fiber coupled-mode theory and elastic-optic theory, validates the accuracy of the sensor. The sensor is also shown to be temperature-immune, and can detect both bending direction and bending angle with a large dynamic range. Furthermore, the sensor implementation incorporates inexpensive single-mode fiber at 650 nm for few-mode operation, enabling low-loss transmission and compatibility with existing interfaces.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Espalhamento de Radiação
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Estresse Mecânico
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Simulação por Computador
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Desenho Assistido por Computador
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Tecnologia de Fibra Óptica
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Luz
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Modelos Teóricos
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article