Towards free-space ultrastable optical frequency transmission

Optical frequency transfer is essential for quantum technology applications, such as timekeeping and communication. To improve frequency transfer systems performance we have developed for both fiber optic and free-space optical links. Also an active pointing system has been developed and implemented for the atmospheric channel of ultra-stable optical frequency signal transfer making it capable of tracking moving objects. These advancements contribute to the expansion of quantum technologies through improved optical transfer systems.