Tunable kHz distributed feedback fiber laser enabled by glass additive-manufacturing

• DOI: 10.48550/arxiv.2407.04598
• Publication Date: 2024-07-05
• Authors: Pawel Maniewski; Alex I. Flint; Rex H. S. Bannerman; Timothy Lee; Martynas Beresna
• Keywords: FOS: Physical sciences; Physics - Applied Physics; Applied Physics (physics.app-ph); Physics - Optics; Optics (physics.optics)

For short sections of fibers tailored to a specific application, fast laser-based manufacturing techniques can be an attractive alternative the often-cumbersome traditional routes. Short, high gain used in e.g., distributed feedback fiber lasers (DFFL) that offer sought after performance suitable for broad range applications modern photonics. DFFLs superior stability and narrower linewidth compared conventional lasers. Tunable, narrow laser sources with output eye-safe spectrum are desired sensing, signal multiplexing, LIDAR systems etc. In this work we present DFFL obtained using Laser-Powder-Deposition made Er-doped silica fiber. Milliwatt level, ultra-narrow line (less than 4 kHz) was phase-shifted grating 16 mm long The backward slope efficiency as 24% when pumping at 976 nm. results presented showcase new possibilities fabrication were unlocked through laser-assisted AM. This sets stage future rapid advanced devices unconventional