Method and apparatus for semiconductor laser driving capable of stably generating consistent optical pulse widths of laser diodes
A semiconductor laser driving circuit includes a light amount detector, a frequency determiner, and an initialization circuit. The light amount detector detects an amount of light emitted by a laser diode, and outputs a first voltage corresponding to the amount of light. The frequency determiner det...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
27.11.2007
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| Online Access | Get full text |
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| Summary: | A semiconductor laser driving circuit includes a light amount detector, a frequency determiner, and an initialization circuit. The light amount detector detects an amount of light emitted by a laser diode, and outputs a first voltage corresponding to the amount of light. The frequency determiner determines a frequency for determining a time period of a detecting operation to detect differential quantum efficiency of the laser diode. The initialization circuit performs an initialization operation to detect differential quantum efficiency of the laser diode with a variation of the time period of the initialization operation according to the frequency determined by the frequency determiner. |
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