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本文对 15 5 0 nm光纤光栅在纵向拉伸应力和侧向拉伸应力作用下 Bragg波长的偏移特性进行了实验研究。当纵向拉伸应力加至 3.6 0 N (36 7.6 0 g)时 ,得到了 5 .0 2 nm的调谐范围。这可能是在相同应力作用下 ,目前所报道的最好结果。此外 ,还对光纤光栅弯曲所导致的其 Bragg波长的迁移特性进行了实验研究 ,并比较了对光纤光栅段添加涂覆层前后的调谐情况 ,得到了最大为 3.0 2nm的波长调谐范围
In this paper, the experimental study of the Bragg wavelength shift characteristics of a 15 5 0 nm fiber gratings under longitudinal tensile stress and lateral tensile stress is carried out. When the longitudinal tensile stress was added to 3.6 0 N (36 7.6 0 g), a tuning range of 5.20 nm was obtained. This is probably the best result reported so far under the same stress. In addition, the experimental study of the Bragg wavelength migration caused by the bending of the fiber grating is also carried out. The tuning before and after the addition of the coating on the FBG is compared and the wavelength tuning range up to 3.0 2 nm is obtained