Method, device, and system for waveform shaping of signal light
AssigneeFujitsu Limited
InventorsShigeki Watanabe, Shinichi Takeda, Kazuo Hironishi
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Abstract
The present invention relates to a method for waveform shaping of signal light. This method includes the steps of supplying signal light to a first waveform shaper to obtain intermediate signal light, dividing the intermediate signal light into first and second signal lights, supplying the first signal light to a clock recovery circuit to obtain a clock pulse, and supplying the second signal light and the clock pulse to a second waveform shaper to obtain regenerated signal light synchronous with the clock pulse.
Claims31
A method comprising the steps of:
- supplying signal light to a first waveform shaper to obtain intermediate signal light;
- dividing said intermediate signal light into first and second signal lights;
- supplying said first signal light to a clock recovery circuit to obtain a clock pulse;
- and
- supplying said second signal light and said clock pulse to a second waveform shaper to obtain regenerated signal light synchronous with said clock pulse.
A device comprising:
- a first waveform shaper for accepting signal light to output intermediate signal light;
- an optical branch for dividing said intermediate signal light into first and second signal lights;
- a clock recovery circuit for accepting said first signal light to output a clock pulse;
- and
- a second waveform shaper for accepting said second signal light and said clock pulse to output regenerated signal light synchronous with said clock pulse.
A system comprising:
- a first optical fiber transmission line for propagating signal light;
- an optical regenerator connected to said first optical fiber transmission line for converting said signal light into regenerated signal light;
- and
- a second optical fiber transmission line connected to said optical regenerator for propagating said regenerated signal light;
- said optical regenerator comprising:
- a first waveform shaper for accepting said signal light to output intermediate signal light;
- an optical branch for dividing said intermediate signal light into first and second signal lights;
- a clock recovery circuit for accepting said first signal light to output a clock pulse;
- and
- a second waveform shaper for accepting said second signal light and said clock pulse to output said regenerated signal light.
A method comprising the steps of:
- converting WDM signal light obtained by wavelength division multiplexing a plurality of optical signals having different wavelengths into an optical time division multiplexed signal;
- obtaining a clock pulse having a frequency corresponding to the speed of each of said plurality of optical signals;
- and
- supplying said optical time division multiplexed signal and said clock pulse to a waveform shaper to obtain regenerated signal light.
Dependencies are inferred from the claim text.