DUOBINARY OPTICAL TRANSMISSION APPARATUS

DUOBINARY OPTICAL TRANSMISSION APPARATUS

PROBLEM TO BE SOLVED: To provide a duobinary optical transmission apparatus with characteristics immune to wavelength division without being affected by transmission characteristics for a PRBS (pseudo-random bit sequence) and without using an existing feedback precoder and an electric low-pass filte...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: GO JUNSAI, KIM SUNG-KEE, LEE HAN-LIM, HWANG SEONG-TEAK
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a duobinary optical transmission apparatus with characteristics immune to wavelength division without being affected by transmission characteristics for a PRBS (pseudo-random bit sequence) and without using an existing feedback precoder and an electric low-pass filter. SOLUTION: The duobinary optical transmission apparatus includes a T flip-flop (toggle flip-flop) 310 and an AND gate 330 in addition to a drive amplifier 360, a Mach-Zehnder-interferometer-optical intensity modulator 370 and a laser light source 380 for outputting an optical carrier. Thus, an input data signal is separated for each "1" group and modulated to include mutually different phases. COPYRIGHT: (C)2005,JPO&NCIPI