1. Digital output compensation for precise frequency transfer over commercial fiber link
- Author
-
Yingxin Zhao, Xing Chen, Yu Zhang, Cheng Ci, Ran Tang, Xuesong Zhang, Bo Liu, and Hong Wu
- Subjects
Physics ,business.industry ,Phase (waves) ,Transmission system ,Hydrogen maser ,Condensed Matter Physics ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Compensation (engineering) ,010309 optics ,Optics ,Transmission (telecommunications) ,Fiber laser ,Wavelength-division multiplexing ,0103 physical sciences ,Electrical and Electronic Engineering ,Photonics ,010306 general physics ,business - Abstract
An ultra-highly precise and long-term stable frequency transmission system over 120 km commercial fiber link has been proposed and experimentally demonstrated. This system is based on digital output compensation technique to suppress phase fluctuations during the frequency transmission process. A mode-locked erbium-doped fiber laser driven by a hydrogen maser serves as an optical transmitter. Moreover, a dense wavelength division multiplexing system is able to separate forward and backward signals with reflection effect excluded. The ultimate fractional frequency instabilities for the long-distance frequency distributed system are up to 3.14×10-15 at 1 s and 2.96×10-19 at 10 000 s, respectively.
- Published
- 2018