Optical device, optical modulation method, and optical...

Details Optical device, optical modulation method, and optical... Optical device, optical modulation method, and optical...

2008-07-29

2011-12-06

Sedighian, M. R. (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S198000

Reexamination Certificate

active

08073339

ABSTRACT:
An optical modulation device including waveform shapers that waveform-shape input data signals in synchronism with a rising or falling timing based on comparison with a reference level of an input clock signal, a multi-level phase modulator that generates a multi-level-phase-modulated optical signal based on the data signals waveform-shaped by the plurality of waveform shapers, and outputs the generated optical signal, and a level ratio controller that varies a relative level ratio of the reference level to an amplitude level of the clock signal input to the waveform shapers, based on the optical signal output from the multi-level phase modulator.

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patent: 7224906 (2007-05-01), Cho et al.
patent: 7418211 (2008-08-01), Akiyama et al.
patent: 7447443 (2008-11-01), Bai
patent: 7817922 (2010-10-01), Cho et al.
patent: 2004/0081470 (2004-04-01), Griffin
patent: 2007/0212079 (2007-09-01), Ooi et al.
patent: 2004-516743 (2004-06-01), None

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