Optical coherence transfer over 50-km spooled fiber with frequency instability of 2×10−17 at 1 s
Ma Chao-Qun, Li-Fei Wu, Jiang Yan-Yi†, Yu Hong-Fu, Bi Zhi-Yi, Ma Long-Sheng
       
Phase noise power spectral density of uncompensated 50km-long fiber (blue solid line), compensated 50km-long fiber (red dashed line), calculated compensated 50km-long fiber (green dash dotted line), and interferometer phase noise floor (black short dash line).