2024/05/24 by Ronan Kervazo, Antoine Congar, Kervazo, R +15
Chemistry · Engineering · Physics and Astronomy · #Advanced Optical Sensing Technologies #FOS: Physical sciences #Laser Design and Applications #Optics (physics.optics) #Spectroscopy and Laser Applications
paper · doi:10.48550/arxiv.2405.15462
openalex publication_date 2024/05/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a compact InGaN fiber Bragg grating (FBG) semiconductor laser diode operating below 400 nm in the single-mode emission regime. This compact coherent laser source exhibits an intrinsic linewidth of 14 kHz in the near-UV range and a side-mode suppression ratio reaching up to 40 dB accompanied by a mW-level output power. Furthermore, the properties of the FBG, including its central wavelength, bandwidth, and reflectivity, can be readily customized to fulfill specific requirements. As a result, the small footprint design of this laser is compatible with integration into a standard butterfly package to ease the lab-to-market technology transfer. The combination of low frequency noise and fibered output signal positions these FBG laser systems as strong candidates for hybridization with integrated photonic platforms tailored for quantum information processing and metrology.