Tapered Velocity Couplers Composed of Nonlinear Waveguides for Limiting Optical Power

Toshiaki KITAMURA  Tetsuro YABU  Masahiro GESHIRO  Shinji HARADA  Shinnosuke SAWA  

IEICE TRANSACTIONS on Electronics   Vol.E84-C   No.4   pp.421-426
Publication Date: 2001/04/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Theory
tapered velocity coupler,  nonlinear waveguide,  optical power limiter,  finite difference method,  

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This paper proposes an optical power limiter composed of serially connected two tapered velocity couplers consisting partly of nonlinear material. The method of device designing is explained and it is exemplified that the optical output can be regulated stably to a prescribed value over a wide range of optical input. The device performance is simulated by means of FD-BPM algorithm.