Chen Lin, Fu Cailing, Cai Zhihao, Shen Pengsheng, Fan Yu, Zhong Huajian, Du Chao, Meng Yanjie, Wang Yiping, Liao Changrui, He Jun, Bao Weijia
Opt Lett. 2022 Jul 15;47(14):3435-3438. doi: 10.1364/OL.464006.
We demonstrate for the first time, to the best of our knowledge, the fabrication of a high-quality fiber Bragg grating (FBG) in ZBLAN fiber by using an efficient femtosecond laser point-by-point technology. Two types of FBG, e.g., high coupling coefficient and narrow bandwidth grating, are successfully obtained. The coupling coefficient is strongly dependent on the grating order and pulse energy. A second-order FBG with an ultrahigh coupling coefficient of 325 m and reflectivity of 97.8% is inscribed in the ZBLAN fiber. A pair of FBGs with a narrow FWHM of 0.30 and 0.09 nm are also demonstrated.
据我们所知，我们首次展示了通过高效的飞秒激光逐点技术在ZBLAN光纤中制造高质量光纤布拉格光栅（FBG）。成功获得了两种类型的FBG，即高耦合系数和窄带宽光栅。耦合系数强烈依赖于光栅阶数和脉冲能量。在ZBLAN光纤中写入了耦合系数高达325 m、反射率为97.8%的二阶FBG。还展示了一对半高宽分别为0.30和0.09 nm的窄FBG。
