Diode laser monofréquence par contre réaction d’un réseau de Bragg fibré dans le proche UV
Single-frequency near-UV diode laser using fiber Bragg grating feedback
Oxxius narrow-linewidth UV laser sources today
Presented at the 2021 Journées Nationales d’Optique Guidée (JNOG), this paper demonstrates a compact near-UV single-frequency laser built around a commercial InGaN/GaN diode and a fiber Bragg grating acting as an external cavity feedback element — with no anti-reflection coating required on the diode facet. The result is a remarkably simple architecture delivering high coherence: 16 kHz intrinsic linewidth, 44 dB side-mode suppression ratio, and 1.4 mW of output power.
This work is directly related to the fiber Bragg grating external cavity approach explored in parallel Oxxius publications in peer-reviewed journals, and reflects the broader research effort behind Oxxius’s narrow-linewidth diode laser product line. Compact, low-noise UV sources with sub-MHz linewidth are increasingly sought after in applications such as Brillouin spectroscopy, Raman spectroscopy, and atom cooling. Oxxius’s current Single Frequency Laser range addresses these requirements in a production-ready, OEM-compatible format.
Abstract
Nous proposons un laser dans le proche-UV. Ses hautes propriétés de cohérence (taux de réjection des modes latéraux de 44 dB, largeur de raie intrinsèque de 16 kHz, puissance de 1,4 mW) et son architecture simple (un réseau de Bragg fibré et une diode commerciale InGaN/GaN sans traitement anti-reflet) en font un composant compact et compétitif.
Abstract (translated from French):
We present a near-UV laser with high coherence properties — 44 dB side-mode suppression ratio, 16 kHz intrinsic linewidth, 1.4 mW output power — and a simple architecture based on a fiber Bragg grating and a commercial InGaN/GaN diode with no anti-reflection coating, making it a compact and competitive component.