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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 characteristics of MFPI: (a) wavelength-temperature sensitivity; (b) wavelength-strain sensitivity.
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f4-sensors-12-10430: The characteristics of MFPI: (a) wavelength-temperature sensitivity; (b) wavelength-strain sensitivity.

Mentions: Figure 4(a) shows that the wavelength-strain sensitivity of the MFPI sensor is ∼0.006 nm/με. In addition, it can be obtained that the phase-strain sensitivity of the MFPI is ∼2.51 × 10−3 rad/με, which is about five times larger than that of an in-line FPI sensor of ∼0.49 × 10−3 rad/με reported previously [40]. On the other hand, Figure 4(b) shows that the wavelength-temperature sensitivity of the MFPI sensor is ∼−0.0021nm/°C. Correspondingly, the phase-temperature sensitivity of the MFPI sensor is ∼−0.87 × 10−3 rad/°C. Hence, the temperature sensitivity of the MFPI sensor is about 11 times smaller than that of the in-line SMF etalon sensor of ∼0.01 rad/°C [39]. It should be noted that it is negative in that the two end-faces of the MFPI cavity would expand towards the cavity centre with the increment of temperature, leading to such a decrease in cavity length.


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

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

The characteristics of MFPI: (a) wavelength-temperature sensitivity; (b) wavelength-strain sensitivity.
© Copyright Policy
Related In: Results  -  Collection

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

f4-sensors-12-10430: The characteristics of MFPI: (a) wavelength-temperature sensitivity; (b) wavelength-strain sensitivity.
Mentions: Figure 4(a) shows that the wavelength-strain sensitivity of the MFPI sensor is ∼0.006 nm/με. In addition, it can be obtained that the phase-strain sensitivity of the MFPI is ∼2.51 × 10−3 rad/με, which is about five times larger than that of an in-line FPI sensor of ∼0.49 × 10−3 rad/με reported previously [40]. On the other hand, Figure 4(b) shows that the wavelength-temperature sensitivity of the MFPI sensor is ∼−0.0021nm/°C. Correspondingly, the phase-temperature sensitivity of the MFPI sensor is ∼−0.87 × 10−3 rad/°C. Hence, the temperature sensitivity of the MFPI sensor is about 11 times smaller than that of the in-line SMF etalon sensor of ∼0.01 rad/°C [39]. It should be noted that it is negative in that the two end-faces of the MFPI cavity would expand towards the cavity centre with the increment of temperature, leading to such a decrease in cavity length.

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