Report of optical frequency transfer via fiber

ZHANG Lin-bo^1,2,3, XU Guan-jun^1,2, LIU Jie^1,2,3, GAO Jing^1,2,

JING Liang^1,2,3, DONG Rui-fang^1,2, LIU Tao^1,2, ZHANG Shou-gang^1,2

1. National Time Service Centre, Chinese Academy of Sciences, Xi′an 710600, China;

2. Key Laboratory of Time and Frequency Primary Standard, Chinese Academy of Sciences, Xi′an 710600, China;

3. Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Abstract: When a narrow-linewidth laser is transferred through a single-mode optical fiber, the phase noise induced by the environment, results in broadening of the laser linewidth. In this article, we introduced the basic principle of the fiber phase noise suppression, and established the experimental system of it. In the experiment we observed the laser phase noise suppression effect through the system of the fiber phase noise suppressing of a 20 m single-mode fiber, the precision of the optical frequency transfer is better than 3×10-18.

Key words: narrow-linewidth laser; optical frequency transfer via fiber; phase noise suppression; optical atomic clock