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首页> 外文期刊>IEEE Journal of Quantum Electronics >Design and Simulation of a Directly Frequency-Modulated DFB Laser
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Design and Simulation of a Directly Frequency-Modulated DFB Laser

机译:直接频率调制DFB激光器的设计与仿真

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摘要

In this work we propose a simple approach to realize the direct frequency modulation of a semiconductor distributed feedback (DFB) laser. The directly frequency-modulated DFB laser (DFL) is biased by a direct current (DC) on a normal electrode along the laser cavity to define the output power. The signal current is applied on an extra short electrode placed in the center section of the DFB laser, isolated from the DC electrode. The varying of the material refractive index in the center section with the signal current introduces an effective grating phase change, thereby alters the lasing frequency. Small-signal simulation shows that a frequency modulation efficiency of 26GHz/mA from 0 to 100GHz and 17GHz/mA from 100GHZ to 200GHz can be achieved, respectively. Large-signal simulation of the waveform and eye-diagram of a frequency-shift keying (FSK) signal generated by the DFL is also performed by converting it to an intensity modulated signal through an optical slope filter.
机译:在这项工作中,我们提出了一种简单的方法来实现半导体分布式反馈(DFB)激光器的直接频率调制。直接频率调制的DFB激光器(DFL)通过沿着激光腔的正电极上的直流电流(DC)偏置,以限定输出功率。信号电流施加在放置在DFB激光器的中心部分中的额外短电极上,从DC电极隔离。具有信号电流的中心部分中的材料折射率的改变引入了有效的光栅相位变化,从而改变了激光频率。小信号仿真表明,从0到100GHz的26GHz / mA的频率调制效率分别可以实现从100GHz到200GHz的0到100GHz和17GHz / ma。还通过通过光学斜率滤波器将其转换为强度调制信号来执行由DFL产生的频移键控(FSK)信号的大信号模拟。

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