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Posted 2006.09.25 0.00 in Lasers by Stephanie

Here’s a great link, everything you want to know about how laser diodes work.

Laser diodes are super tiny but can be surprisingly powerful. Find out how, and why. Warning: Linked site may contain science, physics, and education.

How Laser Diodes Work

Laser Diode and a Penny.
Photo from Wiki

More Fun With Lasers

Posted 2006.07.28 0.00 in Lasers by Stephanie

A couple small videos, of fun with lasers!

In addition to the laser diode I ‘rescued’ from a DVD burner, I have now got myself a Pulsar from Wicked Lasers and a nameless Greenie from the Bay.

The Pulsar is 150mW and the Greenie is 80mW. I don’t know the wattage of the diode from the DVD burner, but after comparing it to what the Pulsar can do, I am thinking that the DVD diode is in the 100mW range. It is mighty strong.

I still haven’t finished perfecting a collimator for the DVD diode so it’s pretty much a ‘contact’ sport using it. The Pulsar has a long focal length; the beam is about 4mm at the apterture and they tend to be focused to about 20-40 feet, so to do close-up burning, an external lense is required. The Greenie’s beam appears to be less than 1mm at the aperture, it’s very tight and compact, although it does seem to spread a bit at a distance.

Needless to say, proper safety precautions must be taken while working with these devices. After experimenting with these, the typical little red pointers are very sad and anemic.

DVD Diode Burning Through Plastic

Pulsar Burning Match With Extra Lense

Greenie Burning Match At 6 or 8 Inches

Lotsa Lasers
Note: If the videos do not play properly, please download them and play them off-line. My server does not like MPG files.