Abstract
Abstract A novel bending self-compensating long period grating (LPG) is proposed and experimentally demonstrated in a hole-assisted eccentric-core fiber (HAEF). Two pieces of HAEFs are aligned along the core and spliced together after the core of one HAEF is rotated 180°around its geometrical center with respect to that of the other HAEF. The proposed structure can compensate for structural asymmetry of the fiber and thus reduce the bending response. A LPG, centered at the fusion splicing point, is fabricated in the HAEF by using a high-frequency CO2 laser. The bending and temperature characteristics of the LPG are investigated. The experimental results show that the proposed LPG is insensitive to the bending but sensitive to the temperature.
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