@inproceedings{f8dfec86133a4f278d352658f18da323,
title = "Fourier Beam Analysis of Photonic Crystal Coupled Triangular VCSEL Array",
abstract = "We show that a photonic crystal triangular VCSEL array can lase in three possible coherent supermodes with three distinctive far-field beam profiles. To determine a dominant supermode at a given level of current injection, we define the peak ratio as the ratio between any sidelobe peak to the central peak of the Fourier transform of the far-field. The peak ratio and the number of sidelobes we show provides a numerical method to determine the dominant supermode in a coherent triangular VCSEL array. Coherent operation is found with approximately equal current injection into each element producing a single spectral resonance and structured far-field profile. We compare experimentally extracted peak ratios for an array nominally emitting at 850nm to those calculated from a complex waveguide modal simulation. This Fourier method based far-field analysis may be useful to determine a useful beam profile for target applications.",
keywords = "Fourier transform, coherent VCSEL array, vertical cavity surface emitting laser",
author = "Nusrat Jahan and William North and Nisha Kolagotla and Choquette, {Kent D.}",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE.; Vertical-Cavity Surface-Emitting Lasers XXVII 2023 ; Conference date: 01-02-2023 Through 02-02-2023",
year = "2023",
doi = "10.1117/12.2650650",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Chun Lei and Graham, {Luke A.}",
booktitle = "Vertical-Cavity Surface-Emitting Lasers XXVII",
}