Optical filter requirements in an EML-based single-sideband PAM4 intensity-modulation and direct-detection transmission system

Optical filter requirements in an EML-based single-sideband PAM4 intensity-modulation and direct-detection transmission system

The feasibility of a single sideband (SSB) PAM4 intensity-modulation and direct-detection (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...

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Veröffentlicht in:Optics express 2017-03, Vol.25 (6), p.5852-5860
Hauptverfasser: Chen, Hsing-Yu, Kaneda, Noriaki, Lee, Jeffrey, Chen, Jyehong, Chen, Young-Kai
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container_end_page 5860
container_issue 6
container_start_page 5852
container_title Optics express
container_volume 25
creator Chen, Hsing-Yu
Kaneda, Noriaki
Lee, Jeffrey
Chen, Jyehong
Chen, Young-Kai
description The feasibility of a single sideband (SSB) PAM4 intensity-modulation and direct-detection (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 feed-forward equalization.
doi_str_mv 10.1364/OE.25.005852
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title Optical filter requirements in an EML-based single-sideband PAM4 intensity-modulation and direct-detection transmission system
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