OTDM-DPSK signal generator capable of detecting an optical...

Details OTDM-DPSK signal generator capable of detecting an optical... OTDM-DPSK signal generator capable of detecting an optical...

2011-07-05

2011-07-05

Vanderpuye, Ken N (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S031000, C398S098000, C398S101000, C398S102000, C398S182000, C398S183000, C398S195000, C398S198000, C398S201000

Reexamination Certificate

active

07974542

ABSTRACT:
An OTDM-DPSK signal generator includes an optical splitter, a first and a second phase modulator, an optical coupler, and a monitor signal splitter. The optical splitter splits an optical pulse string into a first and a second optical pulse string. The first and second phase modulators generate a first and a second channel DPSK signal, respectively. The DPSK signals are provided with one bit delay to generate another DPSK signal, which enters the optical coupler, which outputs an OTDM-DPSK signal, which enters a monitor signal splitter. The monitor signal splitter splits from the OTDM-DPSK signal a monitor signal and inputs the monitor signal to an optical carrier phase difference detector. The detector generates an optical carrier phase difference detection signal as a function of an optical carrier phase difference between optical pulses. The optical carrier phase difference can thus be detected between optical pulses in an OTDM-DPSK signal.

REFERENCES:
patent: 2005/0117191 (2005-06-01), Griffin
patent: 2006/0159458 (2006-07-01), Kagawa
patent: 2007/0165679 (2007-07-01), Kagawa
patent: 2010/0021175 (2010-01-01), Kagawa
patent: 2005-006175 (2005-01-01), None
patent: 2005006176 (2005-01-01), None
R. Ludwig, et al., 160 Gbit/s DPSK-Transmission-Technologies and System Impact; Proc. 30th European Conference on Optical communication (ECOC 2004), Tul.1, 1; 4 pages.

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