Limits...
Photonic crystal fiber Mach-Zehnder interferometer for refractive index sensing.

Wang JN, Tang JL - Sensors (Basel) (2012)

Bottom Line: We report on a refractive index sensor using a photonic crystal fiber (PCF) interferometer which was realized by fusion splicing a short section of PCF (Blaze Photonics, LMA-10) between two standard single mode fibers.The fully collapsed air holes of the PCF at the spice regions allow the coupling of PCF core and cladding modes that makes a Mach-Zehnder interferometer.Experimental results using wavelength-shift interrogation for sensing different concentrations of sucrose solution show that a resolution of 1.62 × 10(-4)-8.88 × 10(-4) RIU or 1.02 × 10(-4)-9.04 × 10(-4) RIU (sensing length for 3.50 or 5.00 cm, respectively) was achieved for refractive indices in the range of 1.333 to 1.422, suggesting that the PCF interferometer are attractive for chemical, biological, biochemical sensing with aqueous solutions, as well as for civil engineering and environmental monitoring applications.

View Article: PubMed Central - PubMed

Affiliation: Department of Construction Engineering, National Yunlin University of Science and Technology, Douliou 64002, Taiwan. wangjn@yuntech.edu.tw

ABSTRACT
We report on a refractive index sensor using a photonic crystal fiber (PCF) interferometer which was realized by fusion splicing a short section of PCF (Blaze Photonics, LMA-10) between two standard single mode fibers. The fully collapsed air holes of the PCF at the spice regions allow the coupling of PCF core and cladding modes that makes a Mach-Zehnder interferometer. The transmission spectrum exhibits sinusoidal interference pattern which shifts differently when the cladding/core surface of the PCF is immersed with different RI of the surrounding medium. Experimental results using wavelength-shift interrogation for sensing different concentrations of sucrose solution show that a resolution of 1.62 × 10(-4)-8.88 × 10(-4) RIU or 1.02 × 10(-4)-9.04 × 10(-4) RIU (sensing length for 3.50 or 5.00 cm, respectively) was achieved for refractive indices in the range of 1.333 to 1.422, suggesting that the PCF interferometer are attractive for chemical, biological, biochemical sensing with aqueous solutions, as well as for civil engineering and environmental monitoring applications.

Show MeSH

Related in: MedlinePlus

A 2.67-cm PCF interferometer with: (a) the transmission spectra for sensing different refractive indices of the sucrose solution (RI = 1.333 – 1.422); (b) the relationship between wavelength shift and refractive index (resonance wavelength = 1,547.26 nm).
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3376571&req=5

f9-sensors-12-02983: A 2.67-cm PCF interferometer with: (a) the transmission spectra for sensing different refractive indices of the sucrose solution (RI = 1.333 – 1.422); (b) the relationship between wavelength shift and refractive index (resonance wavelength = 1,547.26 nm).

Mentions: Regarding Figures 8(b) to 12(b), we performed 15 linear regression analyses using the above three-stage RI areas. Other than one regression analysis, the R2 values were greater than 0.94. Thus, the relationship between wavelength shift and RI for PCF interferometers was assessed as a three-stage linear function and the boundary of the three-stage linear regression was determined. The graph of wavelength shift versus refractive index and three-stage linear regression models were plotted in Figure 8(b). We also conducted the RI experiment for the different four lengths of PCF interferometers and the results were shown in Figures 9 to 12 for sensing length L = 2.67 m, 3.50 cm, 4.40 cm, and 5.00 cm, respectively.


Photonic crystal fiber Mach-Zehnder interferometer for refractive index sensing.

Wang JN, Tang JL - Sensors (Basel) (2012)

A 2.67-cm PCF interferometer with: (a) the transmission spectra for sensing different refractive indices of the sucrose solution (RI = 1.333 – 1.422); (b) the relationship between wavelength shift and refractive index (resonance wavelength = 1,547.26 nm).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376571&req=5

f9-sensors-12-02983: A 2.67-cm PCF interferometer with: (a) the transmission spectra for sensing different refractive indices of the sucrose solution (RI = 1.333 – 1.422); (b) the relationship between wavelength shift and refractive index (resonance wavelength = 1,547.26 nm).
Mentions: Regarding Figures 8(b) to 12(b), we performed 15 linear regression analyses using the above three-stage RI areas. Other than one regression analysis, the R2 values were greater than 0.94. Thus, the relationship between wavelength shift and RI for PCF interferometers was assessed as a three-stage linear function and the boundary of the three-stage linear regression was determined. The graph of wavelength shift versus refractive index and three-stage linear regression models were plotted in Figure 8(b). We also conducted the RI experiment for the different four lengths of PCF interferometers and the results were shown in Figures 9 to 12 for sensing length L = 2.67 m, 3.50 cm, 4.40 cm, and 5.00 cm, respectively.

Bottom Line: We report on a refractive index sensor using a photonic crystal fiber (PCF) interferometer which was realized by fusion splicing a short section of PCF (Blaze Photonics, LMA-10) between two standard single mode fibers.The fully collapsed air holes of the PCF at the spice regions allow the coupling of PCF core and cladding modes that makes a Mach-Zehnder interferometer.Experimental results using wavelength-shift interrogation for sensing different concentrations of sucrose solution show that a resolution of 1.62 × 10(-4)-8.88 × 10(-4) RIU or 1.02 × 10(-4)-9.04 × 10(-4) RIU (sensing length for 3.50 or 5.00 cm, respectively) was achieved for refractive indices in the range of 1.333 to 1.422, suggesting that the PCF interferometer are attractive for chemical, biological, biochemical sensing with aqueous solutions, as well as for civil engineering and environmental monitoring applications.

View Article: PubMed Central - PubMed

Affiliation: Department of Construction Engineering, National Yunlin University of Science and Technology, Douliou 64002, Taiwan. wangjn@yuntech.edu.tw

ABSTRACT
We report on a refractive index sensor using a photonic crystal fiber (PCF) interferometer which was realized by fusion splicing a short section of PCF (Blaze Photonics, LMA-10) between two standard single mode fibers. The fully collapsed air holes of the PCF at the spice regions allow the coupling of PCF core and cladding modes that makes a Mach-Zehnder interferometer. The transmission spectrum exhibits sinusoidal interference pattern which shifts differently when the cladding/core surface of the PCF is immersed with different RI of the surrounding medium. Experimental results using wavelength-shift interrogation for sensing different concentrations of sucrose solution show that a resolution of 1.62 × 10(-4)-8.88 × 10(-4) RIU or 1.02 × 10(-4)-9.04 × 10(-4) RIU (sensing length for 3.50 or 5.00 cm, respectively) was achieved for refractive indices in the range of 1.333 to 1.422, suggesting that the PCF interferometer are attractive for chemical, biological, biochemical sensing with aqueous solutions, as well as for civil engineering and environmental monitoring applications.

Show MeSH
Related in: MedlinePlus