A clock recovery circuit for 80-Gbit/s optical signals and its application to 400-km single channel transmission

A clock recovery based on optical modulation and an electric phase lock loop is demonstrated for 80-Gbit/s optical signals. The 80-Gbit/s pulses are modulated by an optical modulator with a frequency of 40.4GHz and then converted into electric signals. The phase of the 39.6-GHz signal component incl...

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Veröffentlicht in:	Denki Gakkai ronbunshi. C, Erekutoronikusu, joho kogaku, shisutemu Information and Systems, 2002/04/01, Vol.122(4), pp.720-721
Hauptverfasser:	Seikai, Shigeyuki, Yamashita, Ikuo, Shishida, Hirohiko, Shimoura, Kazuhiro
Format:	Artikel
Sprache:	eng
Schlagworte:	80 Gbit/s Clock recovery Modulation OTDM Phase lock loop Subharmonic clock
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Beschreibung
Zusammenfassung:	A clock recovery based on optical modulation and an electric phase lock loop is demonstrated for 80-Gbit/s optical signals. The 80-Gbit/s pulses are modulated by an optical modulator with a frequency of 40.4GHz and then converted into electric signals. The phase of the 39.6-GHz signal component included in the converted signal is compared with that fed from a voltage-controlled oscillator. The scheme is successfully applied to a 400-km transmission experiment.
ISSN:	0385-4221 1348-8155
DOI:	10.1541/ieejeiss1987.122.4_720