Duobinary optical transmitter

Details Duobinary optical transmitter Duobinary optical transmitter

2007-05-08

2007-05-08

Payne, David C. (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S186000

Reexamination Certificate

active

10638814

ABSTRACT:
Disclosed is a duobinary optical transmitter, which includes a laser source for outputting light with a predetermined wavelength; a Mach-Zehnder interferometer-type optical intensity modulator for modulating the intensity of the light according to a three-level data signal inputted through a modulation terminal; a low-pass filter for converting an inputted two-level binary data signal into a three-level data signal through an interference among codes; and, a modulator driver/amplifier for amplifying the three-level data signal and then outputting it to the modulation terminal, wherein the overall bandwidth of the low-pass filter, the modulator driver/amplifier, and the optical intensity modulator corresponds to approximately ¼ of the clock frequency of the two-level binary data signal.

REFERENCES:
patent: 6865348 (2005-03-01), Miyamoto et al.
patent: 2002/0033984 (2002-03-01), Yonenaga et al.
patent: 0825733 (1998-02-01), None
patent: 1128580 (2001-08-01), None
patent: 1185006 (2002-03-01), None
patent: 2002-077059 (2002-03-01), None
A.J. Price et al.; “210 km Repeaterless 10 Gb/s Transmission Experiment Through Nondispersion-Shifted Fiber Using Partial Response Scheme;” Oct. 7, 1995; 3 pages.

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