46 Chapter 5 Tips and Techniques
Figure 19 - Current Limit Example
5.4 Grounding A Laser Diode
The laser outputs are isolated from earth (chassis) ground. Isolating the laser
diode case avoids damaging the device from multiple ground loop potentials,
AC transients, or static discharge. Since test equipment probes, signal
sources, and package mounts are often partially earth grounded, it is often
necessary to also bond the device case to earth ground. It is strongly
recommended that a single point ground scheme be established, specifically
at the binding post. This will help minimize noise, transients, and ground
loop hazards. Be sure to include any modulators in your ground circuit.
Newport cables are especially designed for use with our controllers and
mounts. They provide a shield for noise reduction and proper grounding.
If you have additional questions about your earth grounding method, contact
a Newport applications engineer.
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