Xuewen Yan, Liyong Ren, Li Yang, Dongsheng Ran, Dongdong Han, Yongkai Wang, Lei Liang, Chengfang Xu, Jihong Liu, Jun Dong, Kaili Ren. Broadband Filter Based on High-Precision Microtapered Long-Period Fiber Gratings[J]. Laser & Optoelectronics Progress, 2020, 57(19): 190605