TY - Front. Optoelectron. A1 - Cong YIN, Xiaojun ZHOU, Zhiyao ZHANG, Shenghui SHI, Sixian JIANG, Liu LIU, Tingpeng LUO, Yong LIU T1 - Second-order optical differentiator using mechanically-induced LPFG with a single π-shift Y1 - 2012-09-05 JF - Frontiers of Optoelectronics JO - Front. Optoelectron. SP - 261 EP - 265 VL - 5 IS - 3 UR - https://journal.hep.com.cn/foe N1 - 10.1007/s12200-012-0272-z ER -