Sugita Tatsuya, Hirano Kouki, Abe Tomiya, Itoh Yuzo
Materials Research Laboratory, Hitachi Ltd., 7-1-1 Omika-cho, Hitachi, Ibaraki 319-1292, Japan.
Appl Opt. 2006 Aug 1;45(22):5597-606. doi: 10.1364/ao.45.005597.
We studied the imaging performance of a chirped grating for a demultiplexer designed for coarse wavelength division multiplexing using a wavefront aberration analysis and the ray tracing simulation. The demultiplexer was composed of a chirped grating, cylindrical lenses, and a waveguide. The best image point and the spot shape focused by the chirped grating were effectively calculated with the wavefront aberration. We applied the aberration analysis to design a waveguide to connect branched beams to photodetectors, and we confirmed the demultiplexing performance experimentally.
我们使用波前像差分析和光线追迹模拟，研究了用于粗波分复用解复用器的啁啾光栅的成像性能。该解复用器由一个啁啾光栅、柱面透镜和一个波导组成。利用波前像差有效地计算了啁啾光栅聚焦的最佳像点和光斑形状。我们将像差分析应用于设计连接分支光束到光电探测器的波导，并通过实验证实了解复用性能。
