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We experimentally investigated a simple and new technique for the fabrication of micro-ridge long-period gratings (MRLPGs) based on polarization-maintaining fibers (PMFs). The cladding region of the PMFs was etched periodically using a wet etching technique resulting in the periodic formation of micro-ridges on the surface of the PMF. The PMF-based MRLPGs has two resonant peaks because of the birefringence...
A reflection-type interferometer based on a polarization-maintaining photonic crystal fiber is investigated for simultaneous measurement. Different sensitivities corresponding to input polarization states are utilized for discrimination between chemical vapor and temperature effects.
Micro-ridge long-period fiber gratings (MRLPFGs) inscribed on a polarization-maintaining fiber (PMF) were demonstrated. The cladding region of the PMFs was periodically etched by using a wet etching technique, resulting in the periodic micro-ridges in the surface of the PMF. The PMF-based MRLPFGs has two resonant peaks because of the birefringence of the PMF. Two resonant peaks of the PMF-based MRLPFGs...
We propose a refractive index sensor using Sagnac loop interferometers configured by using tapered polarization-maintaining fibers (PMFs). Reduction of the PMF diameter results in enhancement of the ambient index sensitivity of the tapered-PMF-based Sagnac interferometer.
Micro-tapered long-period fiber gratings (MT-LPFGs) written in tapered fibers with different diameters of 125, 100, 75, and 50 μm are fabricated and their transmission characteristics with variations in strain and temperature are investigated.
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