半导体激光器宽带混沌环形结构论文

1、利用半导体激光器环产生宽带平坦混沌信号的方法【摘要】 利用带外光反馈的半导体激光器产生混沌信号已经被广泛研究。它被应用于混沌雷达,相关光时域反射计,随机数发生器等领域。由于混沌激光器的带宽对以上应用有重要意义,故本文提出了一种增强半导体激光器混沌带宽的方法,内如如下：1.提出利用两个半导体激光器进行互注入产生宽带混沌信号的方案。数值分析表明：这种方案可以通过不同的频率失谐,产生带宽可调的宽带混沌信号。在概念性实验中,具有高带宽的宽带混沌信号得以产生。其带宽超过30GHz,此结果与数值模拟结果一致。2.在互注入结构的基础上,第三个半导体激光器被引入,进一步形成环形结构。在实验中,不同频率下的震荡

2、信号在激光器环中被放大,并产生了43GHz的平坦宽带混沌信号。在进一步研究中,我们指出了光纤环对信号放大的饱和作用这点是产生宽带混沌信号的关键。3.在第四章中,利用半导体激光器环产生可调超宽带信号的方法被提出。通过调整LD1注入光的强度,可以使激光器环的输出状态在两种状态间切换：产生43GHz宽带信号的状态和产生满足美国联邦通信委员会标准超宽带车载雷达信号的状态。产生的超宽带信号中心频率可调。最后,本文对研究结果进行了总结,并对未来可能实施的研究. 更多还原【Abstract】 Optical chaotic signals generated from semiconductor

3、lasers with external feedback, or external injection, have been an attractive issue, which have been studied extensively for applications such as chaotic lidar/radar, chaotic correlation optical time domain reflectometer, random number generator and etc. For these important applications, this thesis

4、 carries through some work to enhance the bandwidth of the chaotic laser as follows:1. A scheme for broadband chaotic signal generation using a mu. 更多还原 【关键词】 半导体激光器； 宽带； 混沌； 环形结构； 【Key words】 semiconductor laser； broadband； chaos； loop structure； 摘要 3-5 ABSTRACT 5-6 .Introduction 9-17 1.1 Dyna

5、mics of chaotic semiconductor laser diode 9-12 1.2 method of enhancing bandwidth 12-15 Bandwidth-enhanced chaos with strong optical injection 12-13 Bandwidth-enhanced chaos with strong optical injection 13-14 Broadband chaotic laser with opto-electronic oscillator 14-15 1.3 Thesis outline 15-17 .Ban

6、dwidh enhanced chaos with mutual injection 17-25 2.1 Theoretical mode and simulation results 17-18 2.2 Simulation results 18-20 2.3 Experimental results 20-23 Experimental Setup 20-21 Experimental results 21-23 Discussion 23 2.4 Conclusion 23-25 .Generation of 43GHz flat broadband chaotic signal 25-

7、37 3.1 Concept-proof experiment 25-30 Experimental Setup 25-26 Experiment results 26-30 3.2 principle explanation 30-35 Generation of high frequency oscillation 30-32 Oscillation charateristics 32-35 3.3 Discussion 35-36 3.4 Conclusion 36-37 .UWB signal generation 37-43 4.1 Experimental setup 38-40 4.2 UWB Generation 40-41 4.3. Discus