Highly Sensitive Refractive Index Sensor Based on Adiabatically Tapered Microfiber Long Period Gratings
نویسندگان
چکیده
منابع مشابه
Highly Sensitive Refractive Index Sensor Based on Adiabatically Tapered Microfiber Long Period Gratings
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 i...
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A highly sensitive refractive index (RI) sensor based on two cascaded microfiber knots with vernier effect is proposed and demonstrated by theoretical arithmetic. Deriving from high proportional evanescent field of microfiber and sharp spectrum fringes induced by vernier effect, a slight change of ambient RI will cause large variation of effective RI and significant wavelength shift of resonant...
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In this Letter we report on fabricating and analyzing a temperature insensitive refractometer based on two concatenated dual-resonance long-period gratings (LPGs) with an appropriate inter-grating space (IGS) in between. The IGS provides a temperature-dependent extra phase difference between the core and cladding modes, making the refractometer similar to a Mach-Zehnder interferometer with its ...
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ژورنال
عنوان ژورنال: Sensors
سال: 2013
ISSN: 1424-8220
DOI: 10.3390/s131014055