DARPA in bid for shark-portable laser rayguns
Flimsy strato-robot cover story widely discounted
DARPA, the Pentagon tech bureau which has conferred upon a suffering human race such boons as the internet, the stealth bomber and the night-vision goggle, has finally made a bid to achieve that which humanity has yearned for above all other things. We refer, of course, to a laser weapon sufficiently portable to be carried on the head of a shark.
The military mayhem-profs refer to their new scheme as Fibre Laser Pulse Source, or FILPS. According to a recently-released presolicitation document (Word docx format - you may need to download add-ons to read):
The FILPS program will culminate in a UAV compatible system that generates 10-mJ, sub-ns duration optical pulses at a 25-kHz repetition rate. The output pulse characteristics, including phase stability, pulse jitter, and laser beam quality, should be sufficient to enable efficient pulse energy scaling to the 100-mJ level via coherent combining.
As any fule can easily work out, that means a power output of up to 2.5 kilowatts - not a battle-strength ray able to vaporise a flying artillery shell in the blink of an eye, but still a pretty hot beam. It would only have to be held on a target for about a third of a second to deliver as much energy as a 9mm pistol bullet does.
But we've seen all this before, haven't we? Whenever an acceptably powerful laser is offered, it always turns out that you'd need a shark the size of a cross-Channel ferry to lift it, let alone its power systems. The world's supervillains have long despaired of a true head-mounted energy weapon solution for realistically sized execution-pool menagerie.
But now the waiting may be at an end. DARPA specify that FILPS should weigh no more than 10kg and have a volume of no more than 10 litres. Admittedly this would need to be scaled up for the higher-end output, and there'd be power sources to consider, but even so a two-tonne great white - surely the shark-pool choice of the more discerning evil billionaire - should have no great difficulty wearing such a device. Indeed, the FILPS technology might come close to putting an almost-practicable, almost useful combat raygun in the hands of puny humans at last.
DARPA, of course, offer a semi-plausible cover story about using the FILPS lasers on "high-altitude UAV platform". No doubt they would suggest that the idea is to use FILPS for such purposes as long-range communications or target designation from stratospheric platforms such as the hydrogen-fuelled Global Observer plane, or the planned solar-powered robot radar dirigible.
But I think we all know what's really going on here. ®
COMMENTS
I feel sorry for the seals
It is well known that the main food source for killer whales is seals and the like. The method of hunting is for the whale to hurl itself up the beach and provided the aim was good and the seal did not it coming, drag it back into the water. But now, they can blast 'em where they sit. What an advancement.
Any volunteers...
Anyone want to volunteer to try and fit a 10kg ray gun on the head of a great white shark?
Then again, I suspect Evil Billionaires don't really "ask" for volunteers, do they? Asking isn't really part of the Evil gene.
Naming FAIL
DARPA have let themselves down with this one. "Fibre Laser Pulse Source, or FILPS"? Any psychotic military general with a grain of hyperbolic naming skill would have called it FLAPS.

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