Optical transmitter, optical transmission/reception system, and drive circuit
AssigneeNEC Corporation
InventorHidemi Noguchi
Life of this patent
Estimating the term…
Abstract
The present invention provides an optical transmitter, an optical transmission/reception system, and a drive circuit, which are capable of adjusting linearity of signal intensity of output light. The optical transmitter includes an optical transmission lines through which an optical signal propagates, phase modulation regions being formed on the optical transmission line. A decoder decodes an input digital signal and outputs signals according to a decoded value. A drive circuit outputs drive signals level of which is equal to or more than three to the each of the plurality of phase modulation regions based on the signals. A control circuit adjusts full-scale amplitude of each of the drive signals by controlling the drive circuit.
Claims12
An optical transmitter comprising:
- an optical modulator that includes an optical transmission line through which an optical signal propagates, a plurality of phase modulation regions being formed on the optical transmission line;
- a decoder that decodes an input digital signal and outputs a signal according to a decoded value;
- a drive circuit that outputs a drive signal to the each of the plurality of phase modulation regions based on the signal according to a decoded value, level of the drive signal being equal to or more than three;
- and
- a control circuit that adjusts full-scale amplitudes of the plurality of the drive signals by controlling the drive circuit.
An optical transmission/reception system comprising:
- an optical transmitter that transmits an optical signal;
- a transmission line in which the optical signal propagates;
- an optical receiver that receives the optical signal through the transmission line;
- wherein
- the optical transmitter comprises:
- an optical modulator that includes an optical transmission line through which the optical signal propagates, a plurality of phase modulation regions being formed on the optical transmission line;
- a decoder that decodes an input digital signal and outputs a signal according to a decoded value;
- a drive circuit that outputs a drive signal to the each of the plurality of phase modulation regions based on the signal according to a decoded value, level of the drive signal being equal to or more than three;
- and
- a control circuit that adjusts full-scale amplitudes of the plurality of the drive signals by controlling the drive circuit.
Dependencies are inferred from the claim text.