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Chirp and frequency offset tolerant coherent burst-mode receiver using directly modulated DFB lasers for coherent PON systems

机译:使用相干PON系统的直接调制DFB激光器的线性调频和频偏耐受相干突发模式接收机

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Burst-mode receiver (BMR) is one of the key components in passive optical networks (PONs). When directly-modulated distribution feedback (DFB) lasers are used as transmitter source, the BMR needs to take additional measures to compensate the effects of the laser frequency chirp. In this paper, we design a coherent optical BMR for a directly-modulated DFB laser source with On-Off Keying (OOK) modulation. We show that by increasing the bandwidth of the low-pass filter (LPF) before analog-to-digital converter (ADC), we can receive signal almost unaffected by frequency chirp and frequency offset. By using coherent detection, we can increase the receiver sensitivity thus enlarge the signal transmission distance.
机译:突发模式接收器(BMR)是无源光网络(PON)的关键组件之一。当直接调制分布反馈(DFB)激光器用作发射源时,BMR需要采取其他措施来补偿激光频率线性调频脉冲的影响。在本文中,我们为具有开关键控(OOK)调制的直接调制DFB激光源设计了相干光学BMR。我们表明,通过在模数转换器(ADC)之前增加低通滤波器(LPF)的带宽,我们可以接收几乎不受频率线性调频和频率偏移影响的信号。通过使用相干检测,我们可以提高接收器灵敏度,从而延长信号传输距离。

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