Modulator Biasing For Optical Transmission
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United States of America Patent
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N/A
Issued Date -
Sep 15, 2016
app pub date -
Jun 4, 2015
filing date -
Mar 9, 2015
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An apparatus includes an optical modulator and an electrical driver. The electrical driver is configured to provide to the modulator an input drive signal comprising multiple input electrical drive levels of a pulse-amplitude modulation (PAM) signal. The electrical driver is further configured to provide unequal spacing between adjacent ones of the multiple input electrical drive levels, and is still further configured to provide a non-zero bias to the input drive signal. The electrical driver may be a component of an optical transmitter, and the input drive signal may be a differential drive signal. The electrical driver may be further configured such that the bias configures the modulator to produce PAM-modulated optical field output levels that are more evenly spaced than the input electrical drive levels.
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