Author:
Tan Haoyang,Chen Zhaoyang,Chen Bin,Gao Shiming,Guan Xiaowei
Abstract
We demonstrate polarization-insensitive grating couplers on thin-film lithium niobate waveguides. Inverse optimization method is used and the fabricated couplers exhibit efficiencies of－6 dB for the TE mode and－6.5 dB for the TM mode.