Optical transmission method and optical transmitter with temperature compensation function
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United States of America Patent
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May 6, 2003
Grant Date -
Sep 12, 2002
app pub date -
Mar 20, 2002
filing date -
Aug 24, 1998
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Abstract
An optical transmitter comprises a modulator for generating a modulated current in accordance with a modulation control signal, a light emitting element driven by the modulated current from the modulator to emit light in accordance with the modulated current, a first current source for supplying the modulator with a driving current, a first temperature detector for detecting an operating temperature of the modulator to output a signal indicative of a detected operating temperature of the modulator, and an amplifier for receiving a data signal to supply the modulator with the modulation control signal based on the data signal. The amplifier has a first modulation control signal controller for controlling a changing amount per unit time of the modulation control signal at rising and falling times in accordance with an output signal of the temperature detector.
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