| 摘要 |
A recording/reproducing apparatus includes a laser for generating laser light to be used for recording/reproducing information onto/from a recording medium, a beam splitter for separating a luminous flux for a monitor, a photodetector for receiving the luminous flux, a power control circuit for keeping an average output of the laser at a predetermined value, a high-frequency adding circuit for applying high-frequency modulation to the laser, and a controller for altering the degree of modulation of the high-frequency modulation. When the average output of the laser is kept constant by the power control circuit, the degree of modulation conducted by the high-frequency adding circuit is altered, the light emitting power (bottom power) subjected to no high-frequency modulation being thus controlled.
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