Sensors 2013, 13(10), 14055-14063; doi:10.3390/s131014055
Communication

Highly Sensitive Refractive Index Sensor Based on Adiabatically Tapered Microfiber Long Period Gratings

1,* email, 1email, 2email and 1email
Received: 23 July 2013; Accepted: 9 October 2013 / Published: 17 October 2013
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: We demonstrate a refractive index sensor based on a long period grating (LPG) inscribed in a special photosensitive microfiber with double-clad profile. The fiber is tapered gradually enough to ensure the adiabaticity of the fiber taper. In other words, the resulting insertion loss is sufficiently small. The boron and germanium co-doped inner cladding makes it suitable for inscribing gratings into its tapered form. The manner of wavelength shift for refractive indices (RIs) differs from conventional LPG, and the refractive index detection limit is 1.67 × 10−5.
Keywords: long period gratings; microfiber; refractive index sensor; adiabatic taper
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MDPI and ACS Style

Ji, W.B.; Tjin, S.C.; Lin, B.; Ng, C.L. Highly Sensitive Refractive Index Sensor Based on Adiabatically Tapered Microfiber Long Period Gratings. Sensors 2013, 13, 14055-14063.

AMA Style

Ji WB, Tjin SC, Lin B, Ng CL. Highly Sensitive Refractive Index Sensor Based on Adiabatically Tapered Microfiber Long Period Gratings. Sensors. 2013; 13(10):14055-14063.

Chicago/Turabian Style

Ji, Wen B.; Tjin, Swee C.; Lin, Bo; Ng, Choong L. 2013. "Highly Sensitive Refractive Index Sensor Based on Adiabatically Tapered Microfiber Long Period Gratings." Sensors 13, no. 10: 14055-14063.

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