Styrning av lasermodulation
The optical power emitted by a semiconductor laser (1) is measured by a monitor diode (11) for adjusting bias and modulation currents (Ib, Im} .Extra predetermined bits are inserted by an earlier stage in the input signal at regular intervals to provide a low frequency component. This component can...
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| Format: | Patent |
| Sprache: | swe |
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| Zusammenfassung: | The optical power emitted by a semiconductor laser (1) is measured by a monitor diode (11) for adjusting bias and modulation currents (Ib, Im} .Extra predetermined bits are inserted by an earlier stage in the input signal at regular intervals to provide a low frequency component. This component can be detected and used for the adjustment. |
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