Optical signal multiplexing device and optical signal multiplexing method
AssigneeFujitsu Limited
InventorFutoshi Izumi
Life of this patent
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Abstract
An optical signal multiplexing device includes a delay-amount adjusting unit that converts wavelengths of optical signals to be multiplexed when the optical signals are obtained, and adjusts delay amounts of the optical signals by passing the wavelength-converted optical signals through waveguides that generate propagation delays corresponding to the wavelengths in the optical signals. The optical signal multiplexing device also includes a waveform-degradation compensation unit that compensates for degradation of a waveform of the optical signals while keeping a difference of propagation delay times between the optical signals delay amounts of which are adjusted by the delay-amount adjusting unit.
Claims10
An optical signal multiplexing device for multiplexing optical signals by an optical time-division multiplexing system, the optical signal multiplexing device comprising:
- a plurality of delay-amount adjusting units that convert wavelengths of a plurality of obtained optical signals to be multiplexed and adjust delay amounts of the optical signals by passing the wavelength-converted optical signals through waveguides that generate propagation delays corresponding to the wavelengths in the optical signals;
- a plurality of waveform-degradation compensation units that compensate for degradation of a waveform of the optical signals while keeping a difference of propagation delay times between the optical signals delay amounts of which are adjusted by the delay-amount adjusting units;
- a plurality of optical gates that extract the optical signals compensated by the waveform-degradation compensation units at respective timings different from each other;
- and
- a multiplexing unit that multiplexes the optical signals extracted by the optical gates and a control signal including control data corresponding to the respective timings.
An optical signal multiplexing method for multiplexing optical signals by an optical time-division multiplexing system, the optical signal multiplexing method comprising:
- obtaining a plurality of optical signals to be multiplexed;
- converting wavelengths of the obtained optical signals;
- adjusting delay amounts of the optical signals by passing the wavelength-converted optical signals through waveguides that generate propagation delays corresponding to the wavelengths in the optical signals;
- compensating for degradation of a waveform of the optical signals while keeping a difference of propagation delay times between the optical signals having the adjusted delay amounts
- extracting the optical signals after compensation for degradation of the waveform at respective timings different from each other;
- and
- multiplexing the optical signals extracted and a control signal including control data corresponding to the respective timings.
Dependencies are inferred from the claim text.