Duobinary optical transmission apparatus

Details Duobinary optical transmission apparatus Duobinary optical transmission apparatus

2007-04-17

2007-04-17

Li, Shi K. (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S188000

Reexamination Certificate

active

10453005

ABSTRACT:
Disclosed is a duobinary optical transmission apparatus. The duobinary optical transmission apparatusenhances nonlinear and dispersion characteristics for an intermediate-long distance transmission at a high-speed transfer rate without the use an electric LPF. The duobinary optical transmission apparatus includes a light source for generating a carrier wave, a duobinary optical signal generator for receiving a Non Return to Zero (NRZ) signal and generating a modulated optical signal generated by modulating the carrier wave according to the NRZ signal, and a Return to Zero (RZ) signal generator for converting the NRZ signal into a RZ (Return to Zero) signal. Therefore, optical intensity and a phase are modulated using only a single interferometer-type optical modulator.

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S. Walklin et al., “On the Relationship Between Chromatic Dispersion and Transmitter Filter Response in Duobinary Optical Communication Systems”, IEEE Photonics Technology Letter, vol. 9, No. 7, Jul. 1997.
H. Kim et al., “Demonstration of Optical Duobinary Transmission System Using Phase Modulator and Optical Filter”, IEEE Photonics Technology Letters, vol. 14, No. 7, Jul. 2002.

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