Chinese Optics Letters · 2015 · 23 citations · 0 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationOptoelectronicsPhotonicsFree-space OpticsLaser OpticsLaser PhysicsOptical Communication SystemsOptical ModulationOptical SourcesCoherent Optical CommunicationGround-to-satellite Optical LinksInjection LockingLasersPower OutputSatellite Free-space Optical Links
In order to realize homodyne reception and Doppler frequency shift tracking in ground-to-satellite coherent laser communication, a local laser is experimentally demonstrated in this Letter. It is realized based on modulationsideband injection locking, and has a 10 GHz tuning range, a 1 THz/s tuning rate, a 5 kHz linewidth, and 16 mW of output power. When applied to a Costas loop in a coherent laser communication system, the local laser can achieve AE5 GHz Doppler frequency shift tracking with a 20 MHz/s frequency shift rate, which is sufficient for the ground-to-satellite coherent laser communication.