新型波导阵列电光扫描器特性研究

利用有限差分光束传输法研究了波导耦合对波导阵列电光扫描器传输特性和扫描特性的影响.结果表明：耦合对其传输特性和扫描特性的影响明显；只有在一定条件下,对其影响才较小,可以忽略.由此可知,在设计光波导阵列结构时,考虑波导耦合效应是至关重要的.进一步,提出了描述光波导阵列电光扫描器的技术指标,并研究了该扫描器的结构优化设计问题.

Study on Characteristics of a Novel Waveguide Array Electro-optic Scanner

Effect of the mutual coupling among waveguides on propagating and scanning characteristics of waveguide array electro-optic scanner (WAEOS) is studied by use of the finite-difference beam-propagation method (FD-BPM). The results indicate that the mutual coupling is usually of great influence on these characteristics but it is of little influence on them only under some certain conditions. Therefore, in order to design structure of WAEOS appropriately, it is necessary to consider the effect of the mutual coupling on propagating and scanning characteristics fully. Some parameters, which are used to describe performance of WAEOS, are put forward and then the optimal structure of WAEOS is discussed with considering the mutual coupling fully.