Reduction of Critical Power in All-Optical Switching with Series-Tapered Nonlinear Directional Coupler

Guosheng PU  Tetsuya MIZUMOTO  Kenichiro ITO  Yoshiki HIGASHIDE  Yoshiyuki NAITO  

IEICE TRANSACTIONS on Electronics   Vol.E78-C   No.9   pp.1315-1318
Publication Date: 1995/09/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electromagnetic Theory
all-optical switching,  series-tapered nonlinear directional coupler,  FE-BPM,  critical power,  

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A novel series-tapered nonlinear directional coupler is proposed to improve all-optical switching characteristics. Its switching characteristics are analyzed by using a beam propagation method based on the Galerkin's finite element technique. It is presented that the critical power of the series-tapered nonlinear directional coupler is smaller than conventional uniform symmetric and tapered nonlinear directional couplers.