Xin Zhao

TL;DR: A multilevel-loop compound control phase sensor based on exclusive-OR gates for high-speed coherent homodyne systems that improves detection sensitivity and proposes some ideas to improve sensitivity.

TL;DR: In this paper, the authors realized the function of the optical phase loop by combining temperature tuning, piezoelectric (PZT) ceramic tuning, and acousto-optic frequency shifter (AOFS) tuning.

TL;DR: High precision in a pseudo-range measurements is achieved, which is the foundation of the inter-satellite laser link, and the framework of the pseudo-code ranging system is introduced.

TL;DR: In this paper, a blimp-borne laser communication terminal was applied to space dynamic base stations to meet the demand for bi-directional transmission of 5G signal laser carriers in space between airships, which achieved an overall technical index of capture probability is better than 98%, the average capture time is 5s, the tracking accuracy was better than 6−15 μrad, the communication rate is 2.5 Gbps and BER is 1E-7.

TL;DR: A laser pseudocode ranging algorithm based on regenerative synchronization mechanism is proposed to address the problems obstructing precise distance measurement between asynchronous satellites, which provides a theoretical and experimental basis for long-distance high-precision intersatellite ranging.