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In-line fiber optic interferometric sensors in single-mode fibers.

Zhu T, Wu D, Liu M, Duan DW - Sensors (Basel) (2012)

Bottom Line: Typical in-line fiber-optic interferometers are of two types: Fabry-Perot interferometers and core-cladding-mode interferometers.It's known that the in-line fiber optic interferometers based on single-mode fibers can exhibit compact structures, easy fabrication and low cost.Also, some recently reported specific technologies for fabricating such fiber optic interferometers are presented.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing 400044, China. zhutao@cqu.edu.cn

ABSTRACT
In-line fiber optic interferometers have attracted intensive attention for their potential sensing applications in refractive index, temperature, pressure and strain measurement, etc. Typical in-line fiber-optic interferometers are of two types: Fabry-Perot interferometers and core-cladding-mode interferometers. It's known that the in-line fiber optic interferometers based on single-mode fibers can exhibit compact structures, easy fabrication and low cost. In this paper, we review two kinds of typical in-line fiber optic interferometers formed in single-mode fibers fabricated with different post-processing techniques. Also, some recently reported specific technologies for fabricating such fiber optic interferometers are presented.

No MeSH data available.


Related in: MedlinePlus

The air-bubble-based FPI sensors with cavity length of 91 μm: (a) schematic, inset picture is the microscope photograph; (b) reflection spectrum.
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f5-sensors-12-10430: The air-bubble-based FPI sensors with cavity length of 91 μm: (a) schematic, inset picture is the microscope photograph; (b) reflection spectrum.

Mentions: Although the method of using a femtosecond laser can form a micro in-line FPI with micron size, it also requires expensive equipment for the cavity fabrication. However, Villatoro et al., Li et al. and Deng et al. proposed a new micro in-line FPI with micron size whose cavity is an air bubble formed by splicing PCF and SMF together [49–51]. It was found that this kind of FPIs could endure high temperatures and is relatively insensitive to external temperatures, whereas it has relative high strain sensitivity. In addition, Duan et al. fabricated a FPI by simply splicing two sections of SMFs together to form the air bubble at the splicing point [96]. Figure 5(a) shows a typical microscope photograph of such an air-bubble-based FPI sensor (middle bottom) formed by Duan et al.


In-line fiber optic interferometric sensors in single-mode fibers.

Zhu T, Wu D, Liu M, Duan DW - Sensors (Basel) (2012)

The air-bubble-based FPI sensors with cavity length of 91 μm: (a) schematic, inset picture is the microscope photograph; (b) reflection spectrum.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472836&req=5

f5-sensors-12-10430: The air-bubble-based FPI sensors with cavity length of 91 μm: (a) schematic, inset picture is the microscope photograph; (b) reflection spectrum.
Mentions: Although the method of using a femtosecond laser can form a micro in-line FPI with micron size, it also requires expensive equipment for the cavity fabrication. However, Villatoro et al., Li et al. and Deng et al. proposed a new micro in-line FPI with micron size whose cavity is an air bubble formed by splicing PCF and SMF together [49–51]. It was found that this kind of FPIs could endure high temperatures and is relatively insensitive to external temperatures, whereas it has relative high strain sensitivity. In addition, Duan et al. fabricated a FPI by simply splicing two sections of SMFs together to form the air bubble at the splicing point [96]. Figure 5(a) shows a typical microscope photograph of such an air-bubble-based FPI sensor (middle bottom) formed by Duan et al.

Bottom Line: Typical in-line fiber-optic interferometers are of two types: Fabry-Perot interferometers and core-cladding-mode interferometers.It's known that the in-line fiber optic interferometers based on single-mode fibers can exhibit compact structures, easy fabrication and low cost.Also, some recently reported specific technologies for fabricating such fiber optic interferometers are presented.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing 400044, China. zhutao@cqu.edu.cn

ABSTRACT
In-line fiber optic interferometers have attracted intensive attention for their potential sensing applications in refractive index, temperature, pressure and strain measurement, etc. Typical in-line fiber-optic interferometers are of two types: Fabry-Perot interferometers and core-cladding-mode interferometers. It's known that the in-line fiber optic interferometers based on single-mode fibers can exhibit compact structures, easy fabrication and low cost. In this paper, we review two kinds of typical in-line fiber optic interferometers formed in single-mode fibers fabricated with different post-processing techniques. Also, some recently reported specific technologies for fabricating such fiber optic interferometers are presented.

No MeSH data available.


Related in: MedlinePlus