Experimental performance of a single-mode ytterbium-doped fiber ring laser with intracavity modulator

We have developed a linearly polarized ytterbium-doped fiber ring laser with a single longitudinal mode output at 1064 nm. A fiber-coupled intracavity phase modulator ensured mode-hop free operation and allowed fast frequency tuning. The fiber laser was locked with high stability to an iodine-stabilized laser, showing a frequency noise suppression of a factor ∼ 105 at 1 mHz.