WEC3O03
SINAP, Shanghai, People's Republic of China
The current timing system in SSRF cannot satisfy the requirement of the pump-probe experiment in SSRF Phase-II project, so the femtosecond timing system was developed to realize 100fs jitter and 200fs phase drift in the long term. The femtosecond timing system is based on optical fiber networks and laser frequency stabilizing system. To achieve less than 100fs jitter, the narrow line-width Continues Wave (CW) laser is used to transmit RF signals in optical fiber networks. In order to achieve less than 200fs phase drift in the long term, the phase change in the optical fiber networks is detected by heterodyne interferometer and compensated by LLRF system to generate timing signals. The design and preliminary test result of femtosecond timing system is presented in this paper.
