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Owing to power-on imbalances that can occur and create power
surges, one way or another, voltage can find its way to the terminals of a
laser diode during a fault condition. Therefore, in order for a fault
protection scheme to be successful, it is preferably connected directly
across the laser diode itself, and located as closely to the laser diode
as possible.
Since the LASORB device is very small, it is easy to locate on a circuit board
that is connected directly to the laser diode. LASORB could also
conceivably be embedded directly within a package of the laser diode
itself.
LASORB is unique its simplicity. By simply placing the LASORB device
directly across the terminals of the laser diode, the laser diode can be
protected against the harmful effects of both positive- and negative-ESD,
and also from the effects of power surges that can occur during power-up
and power-down phases.
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ESD polarity terminology used on this
web site
The term “positive-ESD” is used to
mean electrostatic discharge (ESD) whose voltage polarity would tend
to forward-bias a laser diode. “Negative-ESD,” means ESD whose
voltage polarity would tend to reverse-bias a laser diode. |
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