Optical transmission device, WDM optical transmission apparatus, and optical transmission system using return-to-zero optical pulses
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United States of America Patent
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Dec 21, 1999
Grant Date -
N/A
app pub date -
Feb 19, 1997
filing date -
Feb 23, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical transmission device using return-to-zero optical pulses as transmission optical pulses, which is capable of enhancing a transmission distance as well as a wavelength range with satisfactory transmission characteristics and enabling an easy realization of the wavelength division multiplexing optical transmission. The optical transmission device is formed by an optical transmitter for transmitting transmission optical pulses by superposing digital data signals onto return-to-zero optical pulses, and a modulator for applying one of a phase modulation and a frequency modulation in synchronization with a transmission rate of the transmission optical pulses, to the transmission optical pulses transmitted by the optical transmitter. This optical transmission device can be utilized in forming a wavelength division multiplexing optical transmission apparatus and an optical transmission system.
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