具有强色散光反馈的半导体激光器的宽带和平谱混沌产生

IF 0.5 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

IEICE Nonlinear Theory and Its Applications Pub Date : 2022-01-01 DOI:10.1587/nolta.13.36

Longsheng Wang, Qingqing He, Anbang Wang, Yuncai Wang

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引用次数: 1

摘要

我们提出并实验证明了一种由半导体激光器组成的简单器件结构产生宽带和平谱混沌的方法，该器件受到啁啾光纤布拉格光栅(CFBG)的强色散光反馈。色散反馈光诱导出与激光内模共振的模式分离不规则的外腔模式。这种物理过程引入了更多的高频振荡，从而消除了松弛振荡的支配地位，扩大和平坦了无线电频谱。实验结果表明，在反馈强度为1.60时，可以获得3db带宽为24 GHz的激光混沌，是反馈强度为0.35时带宽的3倍。研究了激光与CFBG之间色散反馈强度和波长失谐对3db带宽的影响。

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Wideband and flat-spectrum chaos generation from a semiconductor laser with strong dispersive light feedback

We propose and experimentally demonstrate a method of generating wideband and flat-spectrum chaos from a simple device configuration composed of a semiconductor laser subject to strong dispersive light feedback from a chirped fiber Bragg grating (CFBG). The dispersive feedback light induces external-cavity modes with irregular mode separations which beat with the internal modes of laser. This physical process of beating introduces more highfrequency oscillations and thus removes the domination of relaxation oscillation, widening and flattening the radio-frequency spectrum. Experimental results show that laser chaos with a 3-dB bandwidth of 24 GHz can be obtained at a feedback strength of 1.60, which is three times the bandwidth at a feedback strength of 0.35. Effects of the dispersive feedback strength and the wavelength detuning between the laser and the CFBG on the 3-dB bandwidth are studied.

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来源期刊

IEICE Nonlinear Theory and Its Applications MATHEMATICS, INTERDISCIPLINARY APPLICATIONS-

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20.00%

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