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US 6,583,910 B1Granted
Optical transmitter and optical communication system using the same
AssigneeOki Electric Industry Co., Ltd.
InventorHideaki Satoh
Life of this patent
Estimating the term…
Abstract
An optical transmitter includes a light source emitting input light; and a modulator modulating the input light in accordance with an input electric signal to generate an optical transmission signal. The transmitter also includes a monitor which detects frequency fluctuation of the optical transmission signal. The modulator is controlled so as to optimize the amount of frequency fluctuation of the optical transmission signal.
Claims15
An optical transmitter, comprising:
- a light source which generates an optical carrier signal;
- an EA (Electro-Absorption) type of optical modulator which modulates the optical carrier signal in response to an applied voltage to generate an optical transmission signal;
- a bias circuit which generates a bias voltage applied to the optical modulator;
- a driver circuit which generates a driving signal supplied to the optical modulator;
- a control circuit which controls an output power of the light source and an amplitude of the driving signal supplied from the driver circuit;
- and
- an optical frequency fluctuation monitor which detects the amount of frequency fluctuation of the optical transmission signal, wherein
- the optical modulator is controlled so as to optimize the amount of frequency fluctuation of the optical transmission signal.
5 more elements
An optical transmission system, comprising:
- an optical transmitter which comprises:
- (1) a light source which generates an optical carrier signal;
- (2) an EA (Electro-Absorption) type of optical modulator which modulates the optical carrier signal to generate an optical transmission signal;
- (3) a bias circuit which generates a bias voltage to be applied to the optical modulator;
- (4) a driver circuit which generate a driving signal to be supplied to the optical modulator;
- (5) a control circuit which controls an output power of the light source and an amplitude of the driving signal, supplied from the driver circuit;
- and
- (6) an optical frequency fluctuation monitor which detects the amount of frequency fluctuation of the optical transmission signal, wherein
- the optical modulator is controlled so as to optimize the amount of frequency fluctuation of the optical transmission signal;
- an optical receiver which is supplied with the optical transmission signal transmitted from the optical transmitter;
- and
- an optical fiber connecting the optical transmitter and the optical receiver.
9 more elements
Dependencies are inferred from the claim text.