Fiber link

Fiber stabilization

Multipoint/Manypoint box (PTB)

Eavesdropping time and frequency: phase noise cancellation along a time-varying path, such as an optical fiber: ol-39-9-2545.pdf

Paper

http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6702156

https://www.osapublishing.org/ol/abstract.cfm?uri=ol-39-9-2545

Scheme