Voigtländer Christian, Krämer Ria G, Goebel Thorsten A, Richter Daniel, Nolte Stefan
Opt Lett. 2016 Jan 1;41(1):17-20. doi: 10.1364/OL.41.000017.
We report on the inscription of fiber Bragg gratings using femtosecond laser pulses and the phase-mask technique. The wavefront of the inscription laser is variably tuned with a spatial light modulator (SLM). By applying Fresnel lenses with different focal lengths, the period of the fiber Bragg gratings could be shifted. A linear change of the grating period for a FBG inscribed with a third-order deformed wavefront and a quadratic-period behavior for a fourth-order wavefront could be verified experimentally for the first time.
我们报道了使用飞秒激光脉冲和相位掩膜技术写入光纤布拉格光栅的情况。写入激光的波前通过空间光调制器（SLM）进行可变调谐。通过应用不同焦距的菲涅耳透镜，可以使光纤布拉格光栅的周期发生偏移。首次通过实验验证了用三阶变形波前写入的光纤布拉格光栅的光栅周期呈线性变化，以及用四阶波前写入的光纤布拉格光栅的周期呈二次周期行为。
