Eliminating Voltage spikes 100%

I have this laser diode and instruction manuals tell me that even a short transient, 1ms long will destroy the diode if it exceeds a given voltage. I think the limit was 4.6V or somewhere around there.

How can I 100% make sure that voltage never exceeds some given level, not even for the briefest of moments? What component do I need to use?

Don't ever hook it to anything with a wire and you're still only 99% certain. All electrical components have a failure point. I was a test engineer for GE and did lightinging and static discharge testing. We never expected things to not fail, only to fail in a safe manner.

What component do I need to use?

A Zener diode would work. It will clamp all negative voltages and all positive voltages above it's zener voltage rating.

Lefty

Look at this site for information on Lasers and their feeding:- http://www.repairfaq.org/sam/laserdps.htm

1ms is short?

I guess all things are relative...

1ms is short?

I guess all things are relative...

Haha I love that fact that I no longer think of that as a short period of time. Thanks LED matrices