title: Feed-forward digital phase compensation for long-distance precise frequency dissemination via fiber network.
abstract: We demonstrate precise microwave frequency dissemination of a hydrogen maser synchronized frequency comb over a 120 km commercial fiber link. The phase noise was compensated by a feed-forward digital compensation scheme, where the value of locally detected phase noise was first transmitted to the remote user end via a wavelength division multiplexing channel in the same fiber link and then compensated directly at the user end. The fractional frequency instability was measured to be at 5.28×10(-16)/s.
authors: Xing
authors: X
authors: Chen
authors: Jian
authors: J
authors: Zhang
authors: Jinlong
authors: J
authors: Lu
authors: Xing
authors: X
authors: Lu
authors: Xusheng
authors: X
authors: Tian
authors: Bo
authors: B
authors: Liu
authors: Hong
authors: H
authors: Wu
authors: Tingsong
authors: T
authors: Tang
authors: Kebin
authors: K
authors: Shi
authors: Zhigang
authors: Z
authors: Zhang