Cool new type of laser?

Since we haven’t covered any really cool laser news in a while, it’s time to throw out our shark-powered story-hounds (and yes, I recognize the incongruity of that analogy) and see what pops up.

Looks here like there is a story out on a new type of laser. While studying laser generation from a device called a quantum cascade laser, scientists noticed that a secondary laser with some unusual properties was generated.

ScienceDaily (Dec. 22, 2008) — A Princeton-led team of researchers has discovered an entirely new mechanism for making common electronic materials emit laser beams. The finding could lead to lasers that operate more efficiently and at higher temperatures than existing devices, and find applications in environmental monitoring and medical diagnostics.

In particular, this new type of laser apparently requires less energy to produce than a traditional laser. While the story in question makes no mention of strapping these frikkin’ lasers to frikkin’ sharks’ heads, I suspect a lower power draw would come in quite handy in any world take-over attempts based on such a premise. Assuming the scientists in question can figure out how to create this secondary laser without the primary laser still being there, of course.

The new laser phenomenon has some interesting features. For instance, in a conventional laser relying on low momentum electrons, electrons often reabsorb the emitted photons, and this reduces overall efficiency. In the new type of laser, however, this absorption is reduced by 90%, said Franz. This could potentially allow the device to run at lower currents, and also makes it less vulnerable to temperature changes. “It should let us dramatically improve laser performance,” he said.

The device used in the study does not fully attain this level of performance, because the conventional, low-efficiency laser mechanism dominates. To take full advantage of the new discovery, therefore, the conventional mechanism would need to be turned off. The researchers have started to work on methods to achieve this outcome, said Franz.

So work is still underway. And has been for a while, in fact. Word from the brains behind this work is they actually discovered this effect sometime last year, but have been working on perfecting or improving it since then. My current suspicions are if this doesn’t end up in shark-based warfare, it will be part of the coming robot uprising. And I, for one, welcome our new robot overlords (unless the zombies take over first).

[tags]Lasers, Frikkin’ sharks, Throw me a bone, Robots, Quantum something I don’t understand, Science Daily[/tags]