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An optical power stabilizing device for use in an optical information recording and reproducing apparatus is disclosed. The device comprises a light source for generating a light output power having a non-linear characteristic to a driving current or voltage thereof, a light detection circuit coupled to the light source for detecting a part of the output light to generate an electric signal, a signal treating circuit connected to the light detection circuit for treating the detected electric signal, a circuit connected to the signal treating circuit for compensating the current or voltage to be supplied to the light source in accordance with the temperature variation, and a control circuit connected to the signal treating circuit and the compensation circuit for controlling the current or voltage to be supplied to the light source.
Powers Stabilizer