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Old 03-24-2013, 11:53 PM #17
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Default Re: My first HeNe

Quote:
Originally Posted by trussmonkey25 View Post
dr Who called..he wants his night light back..cool novelty light.. let's see it in green
Unfortunately as others have said the discharge of all (healthy) HeNe lasers is salmon pink. FWIW the large tube in my avatar is a green tube and the small is a red. Still need to find a red with a lot of plasma showing.


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Old 03-25-2013, 12:08 AM #18
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Default Re: My first HeNe

How about a framework of green beams around it;-p
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Old 04-15-2013, 12:05 AM #19
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Default Re: My first HeNe

I kind of feel sorry for all of that technology with its beautiful physics, being used solely as a lamp.

The whole point of a laser is the beautiful collimated pure frequency amplified beam it produces. What you see in the tube is the negative temperature medium and that orange–red colour, though beautiful, is due to spontaneous emission back to ground state. But for some people their interest in these is motivated more by art, so yeah.
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Old 04-15-2013, 01:56 AM #20
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Default Re: My first HeNe

Well most of us still have the beam shoot out in some direction from our HeNe lamps. Still though, if you understand and are able to appreciate the physics of the beam output then you can understand and appreciate the physics of the neg temp population inversion going on inside of the cavity. You don't have to only appreciate one or the other, you can do both simultaneously. The only different between the intracavity beam and the normal output is there is not enough gain to produce output of the other lines in the intracavity beam.
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Old 04-15-2013, 04:05 AM #21
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Default Re: My first HeNe

OK another take on the laser nightlight, sitting on the nightstand beside the bed.

They can also be done at a 45.
Attached Thumbnails
My first HeNe-hene6.1.jpg   My first HeNe-hene6.2.jpg   My first HeNe-hene6.4.jpg  

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