Chinese Optics Letters, 2019, 17 (7): 071407, Published Online: Jul. 9, 2019
All-fiber-based laser with 200 mHz linewidth
Abstract
We demonstrate the frequency stabilization of a 1.55 μm erbium-doped fiber laser by locking it to a 5-km-long optical fiber delay line (FDL). The stabilized laser is characterized via comparison with a second identical laser system. We obtain a fractional frequency stability of better than 3 × 10 15 over time scales of 1–10 s and a laser linewidth of 0.2 Hz, which is the narrowest linewidth of an FDL-stabilized laser observed to date.
Junchao Huang, Lingke Wang, Yifei Duan, Yafeng Huang, Meifeng Ye, Liang Liu, Tang Li. All-fiber-based laser with 200 mHz linewidth[J]. Chinese Optics Letters, 2019, 17(7): 071407.