Active Pointing System for the Transmission of Ultrastable Optical Frequency Signals through an Open-Air Link

An active pointing system has been developed and created for an atmospheric transfer link for ultrastable optical frequency signals. This system can significantly decrease the deviations of laser beam direction and ensure stable transmission under conditions of a moving reflector installed at the midpoint of the line. The results of testing the system confirm its high efficiency and potential for use under real conditions.