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