Bayesian Optimized Design for O-Band Bottom-Up Grown Microring Lasers

Abstract

On-chip coherent laser sources are crucial for enabling photonic integrated circuits, yet progress has been hindered by the complex interplay between material quality, device geometry, and performance metrics. We combine high-throughput characterization, statistical analysis, experimental design, and multiobjective Bayesian optimization to accelerate the design process for low-threshold, high-yield III–V microring lasers with room-temperature operation at communication wavelengths. We demonstrate a 1.6 × reduction in threshold over expert-designed configurations, achieving a 100% lasing yield in optimized fields, over 250 rings that emit within the O-band, and a field-median threshold as low as 33 μJ cm^–2 pulse^–1.