| 摘要 |
A semiconductor laser control apparatus for controlling an optical output of a semiconductor laser comprises a correcting part supplied with a modulation signal which determines ON and OFF states of the semiconductor laser for outputting a processed modulation signal, and a driving circuit supplied with the processed modulation signal from the correcting part for supplying a driving signal to the semiconductor laser. The correcting part includes a differentiating circuit responsive to the processed modulation signal for supplying a correction signal having a predetermined time constant to the driving circuit when the semiconductor laser is ON so as to maintain the optical output of the semiconductor laser constant, and a pulse width correcting circuit for correcting a pulse width of the modulation signal to obtain the processed modulation signal. The processed modulation signal is supplied to the driving circuit so that the semiconductor laser is ON and operates until a time which is delayed by a predetermined delay time from an operation end time determined by the modulation signal.
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