Optical transmission apparatus and method
AssigneeFujitsu Optical Components Limited
InventorsRyou Okabe, Toru Matsuyama
Life of this patent
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Abstract
An optical transmission apparatus and an optical transmission method are provided. In particular, an optical transmission apparatus is disclosed as being configured to add strength to a signal. The signal corresponds to a value that an input signal has, and the strength added to the signal is strength according to the value. The optical transmission apparatus is further configured to give delays to a plurality of signals that includes the signal and to convert the sum of the plurality of signals into an optical signal.
Claims8
An optical transmission apparatus configured to transmit an optical signal with intensity according to an input signal, the optical transmission apparatus comprising:
- a modulation mapping unit that adds strength according to a value that the input signal has;
- a plurality of skew units that give delays to a plurality of signals outputted in parallel from the modulation mapping unit;
- an addition unit that adds up the plurality of signals given the delays to generate a sum signal;
- an electric-optic conversion unit that converts the sum signal into the optical signal and transmits the optical signal, wherein a light intensity of the optical signal is modulated in accordance with strength of the sum signal and a wavelength of the optical signal varies in accordance with the light intensity;
- and
- a skew control unit that gives delay amounts to the plurality of skew units, the delay amounts being amounts of the delays.
An optical transmission method for a multi-value signal, the method comprising:
- adding strength to a signal, wherein the signal corresponds to a value that an input signal has and the strength is in accordance with the value;
- giving delays to a plurality of signals that includes the signal;
- adding up the plurality of signals, to which the strength is added, to generate a sum signal, the plurality of signals further given the delays;
- and
- converting the sum signal into an optical signal and transmitting the optical signal, wherein a light intensity of the optical signal is modulated in accordance with strength of the sum signal and a wavelength of the optical signal varies in accordance with the light intensity.
Dependencies are inferred from the claim text.