雙穩態雷射二極體之混沌的同步與數位傳遞

Abstract

藉由輸入一個 a+b sin(2πft) 的電流至雙穩態雷射二極體，可以產生混沌光，給兩個這樣的混沌系統不同的初始值，為了達成其同步現象，我們根據Pecora和Carroll的理論，建立了驅動－－回應系統模型。在同步的情況下，我們可以將數位訊號載在參數 a , b , 或 f上，接收端利用同步誤差函數的測量，可以將數位訊號還原。結果我們發現，不同參數的選擇，對於數位訊號的還原差異很小。

Optical chaotic light can be obtained by injecting a sinusoidal electronic signal into a bistable laser diode. To synchronize between two identical chaotic systems with different initial conditions, a drive and response system is constructed ccording to Pecora and Carroll's theory. In the context of synchronization, optical chaotic transmission of digital signals sent by three different input parameters (a,b and f )is investigated. All the digital messages can be reconstructed by measuring the synchronization error function in the receiving end. our results seem to indicate that the choice of different parameters in sending out digital signals have little effect on reconstruction of the signals in receiving end.