Mustacich R, Gilbert M, Finn R, Swann C
Appl Opt. 1992 May 20;31(15):2800-6. doi: 10.1364/AO.31.002800.
A design for overlapping electrodes for use with thin-film nonlinear optical polymer waveguides is analyzed. The suggested electrode structure serves both to pole birefringent waveguides in a polymer thin film and to apply rf modulation to the waveguide thus defined. This structure is also designed to minimize capacitance, to maximize electro-optic overlap, and to not require a conducting substrate or surface coating of the substrate. A figure-of-merit is developed to optimize both the longitudinal and the transverse geometry of this electrode structure. A fabrication approach to this general design is presented. Optical characterization data are presented for prototype optical phase modulators fabricated by this design. Fiber coupling losses, propagation losses, and dependence of propagation losses upon cladding thicknesses, composition, and electrode composition are presented.
分析了一种用于薄膜非线性光学聚合物波导的重叠电极设计。所建议的电极结构既用于极化聚合物薄膜中的双折射波导，又用于对如此定义的波导施加射频调制。这种结构还旨在使电容最小化、电光重叠最大化，并且不需要导电衬底或衬底的表面涂层。开发了一个品质因数来优化这种电极结构的纵向和横向几何形状。提出了这种通用设计的制造方法。给出了通过这种设计制造的原型光学相位调制器的光学表征数据。给出了光纤耦合损耗、传播损耗以及传播损耗对包层厚度、成分和电极成分的依赖性。
