公开(公告)号：US20230194906A1

公开(公告)日：2023-06-22

申请号：US16957309

申请日：2018-12-21

Applicant: Lumentum Technology UK Limited

Inventor： Selina FARWELL

IPC: G02F1/01 ,  G02F1/025 ,  G02F1/015

CPC classification number: G02F1/0123 ,  G02F1/025 ,  G02F1/0156 ,  G02F1/0157

Abstract: A method of equalising optical losses, at a required operating wavelength, in waveguide sections in an optoelectronic device comprising a first semiconductor waveguide section and a second semiconductor waveguide section, the method comprising determining (1301) a first optical loss through the first waveguide section for a signal with the required operating wavelength, determining (1302) a second optical loss through the second waveguide section for the signal, determining (1303) a loss difference between the first optical loss and the second optical loss, determining (1304) a first bias voltage based on the loss difference and the operating wavelength, such that the loss difference is reduced, and applying (1305) the bias voltage to the first waveguide section.

公开(公告)号：US20230208100A1

公开(公告)日：2023-06-29

申请号：US16957654

申请日：2018-12-21

Applicant: Lumentum Technology UK Limited

Inventor： Selina FARWELL ,  Robert GRIFFIN ,  Samuel DAVIES

IPC: H01S5/026 ,  H01S5/0625 ,  G02F1/025

CPC classification number: H01S5/026 ,  H01S5/0625 ,  G02F1/025

Abstract: A method of operating an optoelectronic device comprising an optical waveguide section, the optical waveguide section comprising a semiconductor core, the method comprising the steps of determining (401) a range for a negative bias voltage for the waveguide section for which an optical loss of the core is lower than an optical loss at zero bias for an operating wavelength range of the device, selecting (402) a bias voltage within the range and applying (403) the selected bias voltage to the waveguide section.