延迟光反馈VCSEL的混沌动力学特性

根据延迟光反馈垂直腔面发射半导体激光器动力学模型,数值模拟了激光器的混沌动力学特性,分析了外腔长度和光反馈强度对激光器混沌动力学特性的影响.结果表明:外腔较短的激光器,经过混沌区后仍会回到锁频状态|外腔较长的激光器,经过混沌区后不是进入锁频状态而是回到周期1.取定激光器外腔长度为3.0 cm,使反馈强度由小增大,得到激光器由倍周期分岔进入混沌的过程,并在混沌区中出现周期12窗口.本文对混沌保密通信的实际应用具有一定的理论参考价值.     

Wavelength assignment for all-to-all broadcast in WRMD WDM linear array and ring

This paper proposes a wavelength assignment method for all-to-all broadcast in wavelength reusable multi-carrier distributed (WRMD) wavelength division multiplexing (WDM) linear array and ring networks with wavelength reuse. An expression on the minimum number of wavelengths required to establish all-to-all broadcast is also derived for the networks. It is observed that one carrier regeneration per wavelength significantly reduces the number of wavelengths compared to that without carrier regeneration. The results also show that regenerating carriers more than once has little effect on the required number of wavelengths.