Author:
Du Yuhan,Ji Xingchen,Xie Weiqiang,Tian Meng,He Yu,Su Yikai
Abstract
We design and experimentally demonstrate an efficient fiber-chip edge coupler for NUV using symmetric double-tip taper and MMI-based coupler. We measure the coupling loss down to 2.85 dB at 407 nm on an alumina-on-insulator platform.