Optimal design of vertical coupled ARROW filters

概要

論文の詳細を見る
In the WDM access network, optical waveguide channel add/drop filter is essential to combine and separate a particular wavelength channel from the multiplexed signal stream without affecting the signal flow in other copropagating channels. The performance of the WDM network is directly determined by its filter performance, which is measured by the frequency selectivity, out-of-band signal rejection, and the transfer characteristics of the pass-band. Recently, we have demonstrated a compact and narrow bandwidth optical waveguide filter that is suitable for the add/drop operation. The filter, as shown in Figure 1, consists of a conventional ridge waveguide overlapping a three dimensional stripe lateral confinement ARROW waveguide in a crossing configuration. By utilizing the large difference of waveguide dispersion between the two waveguides, narrow bandwidth of 5.5 nm with a device interaction length of 1.2 mm was achieved. However, the spectral response obtained from the simple crossing configuration is Gaussian-like instead of the ideal box-like spectral response of the add/drop filter. To pursue the ideal spectral response, we developed optimization techniques in the design of the filter configuration.
社団法人電子情報通信学会の論文
1997-03-06