Mode-Coupling-Driven Frequency Stabilization in Semiconductor Lasers with Bragg Grating Waveguide

• DOI: 10.48550/arxiv.2406.06269
• Publication Date: 2024-01-01
• Authors: Mahani, M. R.; Nechepurenko, Igo...; Rahimof, Yasmin; Wicht, Andreas
• Keywords: FOS: Physical sciences; Physics - Applied Physics; Applied Physics (physics.app-ph); Physics - Optics; Optics (physics.optics)

Precisely stabilizing laser frequency is crucial for advancing laser technology and unlocking the full potential of various quantum technologies. Here, we propose a compact device for stabilizing frequency of a semiconductor laser through mode coupling effects, which provides enhanced sensitivity. Our proposed architecture features a main ridge waveguide with a Bragg grating, flanked by two curved ridge waveguides. This configuration exhibits an optical phenomenon characterized by a transmission crossing at the wavelength of the Bragg grating. Using particle swarm optimization strategy and employing efficient figures of merit, we achieve a high transmission crossing. The observed asymmetric transmission crossing not only holds the promise for an efficient and compact on-chip laser frequency stabilizer, but also fosters the development of novel sensing platforms with heightened sensitivity.