Coherently-coupled vertical-cavity laser arrays

vertical cavity surface-emitting lasers;beam steering;phased array;optical phased array;semiconductor laser array;diode laser array;coupled mode theory;dynamic coupled mode theory

Johnson, Matthew

关键词: vertical cavity surface-emitting lasers;    beam steering;    phased array;    optical phased array;    semiconductor laser array;    diode laser array;    coupled mode theory;    dynamic coupled mode theory;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/46669/Matthew_Johnson.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Coherently-coupled vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability and manufacturing ease.Previous work on coherently-coupled VCSEL arrays has left unfinished the tasks of determining the beam steering mechanism within the arrays and achieving current uniformity across large arrays without resorting to overly-complicated fabrication procedures.This work fulfills the former by establishing a full theoretical connection between the differential current injected into the array elements and the observed steering of the far-field beam.Record high beam-steering speed and phase responsivity are also demonstrated, showing promise for applications in high-speed modulation.The first in-phase emission from a coherently-coupled bottom-emitting VCSEL array is also demonstrated, along with significantly improved current uniformity across larger arrays.