標題: Optical filter requirements in an EML-based single-sideband PAM4 intensity-modulation and direct-detection transmission system
作者: Chen, Hsing-Yu
Kaneda, Noriaki
Lee, Jeffrey
Chen, Jyehong
Chen, Young-Kai
光電工程學系
Department of Photonics
公開日期: 20-Mar-2017
摘要: The feasibility of a single sideband (SSB) PAM4 intensity-modulation and directdetection (IM/DD) transmission based on a CMOS ADC and DAC is experimentally demonstrated in this work. To cost effectively build a >50 Gb/s system as well as to extend the transmission distance, a low cost EML and a passive optical filter are utilized to generate the SSB signal. However, the EML-induced chirp and dispersion-induced power fading limit the requirements of the SSB filter. To separate the effect of signal-signal beating interference, filters with different roll-off factors are employed to demonstrate the performance tolerance at different transmission distance. Moreover, a high resolution spectrum analysis is proposed to depict the system limitation. Experimental results show that a minimum roll-off factor of 7 dB/10GHz is required to achieve a 51.84Gb/s 40-km transmission with only linear feedforward equalization. (C) 2017 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.25.005852
http://hdl.handle.net/11536/144919
ISSN: 1094-4087
DOI: 10.1364/OE.25.005852
期刊: OPTICS EXPRESS
Volume: 25
Issue: 6
起始頁: 5852
結束頁: 5860
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