公开(公告)号：US11664640B1

公开(公告)日：2023-05-30

申请号：US17394726

申请日：2021-08-05

Applicant: United States of America as represented by the Administrator of NASA

Inventor： Mark A. Stephen ,  Bowen Song ,  Jonathan Klamkin ,  Victoria Rosborough ,  Joseph Fridlander

IPC: H01S5/00 ,  H01S5/12 ,  H01S5/125 ,  H01S5/10

CPC classification number: H01S5/1225 ,  H01S5/1021 ,  H01S5/125 ,  H01S5/1209 ,  H01S5/1228 ,  H01S5/1237 ,  H01S5/124

Abstract: A non-etched gap is introduced along the length of an integrated Bragg grating with etched grooves such that the coupling coefficient, K, of the grating is reduced by the non-etched gap. In this way, multiple grating K values may be defined within a photonic integrated circuit using a single lithography and etch step. Additionally, the non-etched gap width may be varied along the length of a single grating to implement a chirped grating.