200-GHz and 50-GHz AWG channelized linewidth dependent transmission of weak-resonant-cavity FPLD injection-locked by spectrally sliced ASE
作者： Gong-Ru Lin , Tzu-Kang Cheng , Yu-Chieh Chi , Gong-Cheng Lin , Hai-Lin Wang
DOI: 10.1364/OE.17.017739
关键词:
摘要: In a weak-resonant-cavity Fabry-Perot laser diode (WRC-FPLD) based DWDM-PON system with an array-waveguide-grating (AWG) channelized amplified spontaneous emission (ASE) source located at remote node, we study the effect of AWG filter bandwidth on transmission performances 1.25-Gbit/s directly modulated WRC-FPLD transmitter under ASE injection-locking. With filters two different channel spacings 50 and 200 GHz, several characteristic parameters such as interfered reflection, relatively intensity noise, crosstalk reduction, side-mode-suppressing ratio power penalty BER transmitted data are compared. The 200-GHz filtered injection minimizes noises ONU transmitter, improving upstream by −1.6 dB 10−12. contrast, 50-GHz fails to promote better but increases + 1.5 back-to-back transmission. A theoretical modeling elucidates that degradation up 4 orders magnitude between cases is mainly attributed reduction linewidth, since which concurrently degrades signal-to-noise extinction ratios stream.
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