@misc{Tao_Qing_Optical_2011, author={Tao, Qing and Luo, Fengguang and Cai, Dusi and Liang, Qianliang and Wan, Zhengwen and Song, Xinming and Liu, Xuechao}, contributor={Gaj, Miron. Redakcja and Urbańczyk, Wacław. Redakcja}, year={2011}, rights={Wszystkie prawa zastrzeżone (Copyright)}, description={Optica Applicata, Vol. 41, 2011, Nr 3, s. 669-678}, publisher={Oficyna Wydawnicza Politechniki Wrocławskiej}, language={eng}, abstract={In this paper, we calculate three effective refractive indexes for cascaded silicon-on-insulator (SOI) nonlinear directional coupler. For each effective refractive index, the coupling length LC, core-to-distance-ratio K and switching threshold power Pi, m are calculated, respectively. However, there are some fabrication errors, which are ΔW, ΔH, ΔK in the height of Si layer and width of Si layer and error of core-to-distance-ratio. We have analyzed the influence of power transmission efficiency Ti, j and relative transmission efficiency error Δi, j caused by the change of ΔW, ΔH, ΔK. Furthermore, we find the tolerance range of ΔW, ΔH, ΔK for Ti, j and Δi, j in couplers a, b, c. The other four input pulses with different powers are switched to four different ports. Although output pulses show some little compression and loss, the value of η is very small and output pulse waveforms are not affected seriously. The basic switching function has been realized, so this design is proved to be effective.}, title={Optical switch based on cascaded SOI nonlinear directional coupler}, type={artykuł}, keywords={optyka, silicon-on-insulator (SOI), vector finite element, discrete split-step multi-wavelet transfor-mation, coupled nonlinear Schrödinger equation (CNLSE)}, }