Neubert W M, Kudielka K H, Leeb W R, Scholtz A L
Appl Opt. 1994 Jun 20;33(18):3820-30. doi: 10.1364/AO.33.003820.
The feasibility of an optical phased array antenna applicable for spaceborne laser communications was experimentally demonstrated. Heterodyne optical phase-locked loops provide for a defined phase relationship between the collimated output beams of three single-mode fibers. In the far field the beams interfere with a measured efficiency of 99%. The main lobe of the interference pattern can be moved by phase shifting the subaperture output beams. The setup permitted agile beam steering within an angular range of 1 mr and a response time of 0.7 ms. We propose an operational optical phased array antenna fed by seven lasers, featuring high transmit power and redundance.
实验证明了适用于星载激光通信的光学相控阵天线的可行性。外差光学锁相环可在三根单模光纤的准直输出光束之间提供确定的相位关系。在远场中，光束发生干涉，测量得到的干涉效率为99%。通过对子孔径输出光束进行相移，可以移动干涉图样的主瓣。该装置能够在1毫弧度的角度范围内实现灵活的光束转向，响应时间为0.7毫秒。我们提出了一种由七台激光器馈电的可运行光学相控阵天线，其具有高发射功率和冗余性。
