Tunable Brillouin/Neodymium Fiber Laser with Non-Resonant Pumping

Coherent laser sources with low intensity and frequency noise are quintessential for applications in coherent communication and Lidar, interferometric sensing, high-resolution spectroscopy, and optical clocks. Due to the narrow homogeneous gain bandwidth (few tens of MHz) of Stimulated Brillouin Scattering (SBS), Brillouin fiber lasers (BFLs) emit ultra-narrow linewidth Stokes lines with high spectral purity and improved noise characteristics [1], [2]. In this work, we demonstrate a high power, polarization maintaining (PM), low-noise, single frequency (SF) Neodymium-doped fiber laser (NDFL) and its subsequent use as a BFL pump.