公开(公告)号：EP4020070A1

公开(公告)日：2022-06-29

申请号：EP21804238.0

申请日：2021-01-26

申请人： Suzhou Lycore Technologies Co., Ltd.

发明人： LIANG, Hanxiao ,  SONG, Yipin ,  ZHOU, Yincong ,  WU, Haicang ,  MAO, Wenhao ,  SONG, Shiwei

IPC分类号： G02F1/035

摘要： A coplanar waveguide wire electrode structure and a modulator. The coplanar waveguide wire electrode structure comprises a metal electrode and an optical waveguide (3). The metal electrode comprises ground electrodes (1) and a signal electrode (2), and connecting arms (7) are arranged on both sides of the signal electrode (2). The inner sides of the ground electrodes (1) are provided with connecting arms (7), the tail ends of the connecting arms (7) of the signal electrode (2) are provided with signal wire extension electrodes (8), and the tail ends of the connecting arms (7) of the ground electrodes (1) are provided with ground wire extension electrodes (6). A distance D1 is provided between the signal wire extension electrodes (8) and the ground wire extension electrodes (6), and the optical waveguide (3) passes through the spaces between the signal wire extension electrodes (8) and the ground wire extension electrodes (6). By extending the metal electrode, the distance between the electrodes is actually shortened, so that in the case of less influence on a characteristic impedance, an interval between the electrodes is reduced, the electric field intensity between the electrodes is increased, the electro-optic conversion efficiency is greatly improved, and a driving voltage of the modulator is decreased.