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提出了一种新型光纤光栅中心波长与带宽独立调谐方法。将光纤光栅沿圆柱形弹性梁的轴向成一定角度粘贴于侧面 ,通过改变梁的扭转角与侧向位移 ,实现了光纤布拉格光栅中心波长与带宽的准线性独立调谐。实验上获得了 8.2 8nm准无啁啾波长调谐和 5 .32nm准无中心波长漂移的带宽调谐 ,实验结果与理论分析一致。
A new method for independent tuning of the center wavelength and bandwidth of fiber grating is proposed. The fiber grating is attached to the side of the cylindrical elastic beam at an angle, and the quasi-linear independent tuning of the center wavelength and the bandwidth of the fiber Bragg grating is achieved by changing the torsional angle and the lateral displacement of the beam. The bandwidth tuning of 8.2 8nm quasi-no-chirp wavelength tuning and 5.32nm quasi-centerless wavelength drift is obtained experimentally. The experimental results are consistent with the theoretical analysis.