Speaker
Description
After years of development, the phase-locked loop technology has gradually tended to maturate. The photoelectric phase-locked loop based on an optical-microwave phase detector can meet the high-precision synchronization requirements of scientific facilities such as UED, XFEL. Whereas, several kinds of noise introduced in the phase detection process will reduce the integrity of the original signal. In this work, we apply electro-optic sampling timing detection technology to designing an all-fiber optical-microwave phase detector based on a Sagnac interferometer, which is effective to be used in fully suppression of the amplitude-to-phase conversion noise introduced by beam direction and amplitude fluctuation, the thermal noise caused by the thermal disturbance of resistance components, and the shot noise caused by the random fluctuation of incident photons. The laser-microwave synchronization based on this phase detector enables the ultrahigh laser stability of the fiber mode-locked laser to be coherently transferred to the L-band, S-band or C-band microwave signal sources, which is of great significance for the improvement and application of RF synchronization in accelerator equipments.
