Direct phase control method for binary phase-shift keying space coherent laser communication

An optical phase locking method based on direct control is proposed. The core of this to synchronize the carrier by directly changing local beam. corresponding experimental device and supporting algorithm were configured verify feasibility method. Phase can be completed without cycle skipping, acquisition time 530 ns. Without an preamplifier, a sensitivity -34.4 dBm obtained, bit error rate 10-9 for 2.5 Gbit/s binary phase-shift keying modulation. measured standard deviation 5.2805°.