 Food for thought
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2Spoons
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Registered Member #2939
Joined: Fri Jun 25 2010, 04:25AM
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Posts: 615
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Steve Conner wrote ... For a "haze of red awesomeness" it might be possible to make a spherical cavity that would lase in all directions, but it would be an engineering nightmare. And in fact the strong directional behaviour of lasers is one of the properties that makes them useful. The spherical laser would be nothing but a coloured light bulb with an annoying speckle. 
I think you could do it with a sphere of Nd-YAG, with the appropriate dielectric mirror coating transparent to 808nm for pumping, and partially reflective at 1064nm to form the cavity. It would still be more interesting than a 'coloured light bulb' as it would behave like a true point-source.
Not sure I'd class it as an engineering nightmare, but certainly not for the faint hearted!
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