Yip G L, Noutsios P C, Chen L
Appl Opt. 1996 Apr 20;35(12):2060-8. doi: 10.1364/AO.35.002060.
Experimental and theoretical improvements to the propagation-mode near-field technique for refractive-index profiling have been made. The measured near-field profile is deconvoluted with the transfer function of the optical imaging system in order to recover the actual near-field profile. Anew equation is also derived in order to use these data to reconstruct the refractive-index profile of the waveguide under consideration. The improved method, which is valid for all relevant wavelength ranges, is demonstrated in the determination of the refractive-index profiles of two single-mode planar waveguides.
对用于折射率分布测量的传播模式近场技术进行了实验和理论改进。将测量得到的近场分布与光学成像系统的传递函数进行去卷积，以恢复实际的近场分布。还推导了一个新方程，以便利用这些数据重建所考虑的波导的折射率分布。在测定两个单模平面波导的折射率分布时，展示了这种对所有相关波长范围均有效的改进方法。
