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FrozenGate by Avery

My Newest HeNe Toy

Yes its been done. Use a V shape. Powers to 300 mW using specially shaped bores, since HENE mixes need wall collisions to depopulate the lower level.

Ie the bore is star shaped or elliptical for more wall collision area.

Steve
 





Hi Dave,
Another question if I may.....
With these 390T HeNe power supplies, mine doesn't have a trimpot so I can't adjust the output. Not sure if yours has it or not. I was wondering if you connected such a beefy PS to a smaller tube, will it damage the tube or will the tube/power supply only allow the required amount of current to flow through the tube?
Cheers,
Rob.
 
timelablasers said:
Hi Dave,
Another question if I may.....
With these 390T HeNe power supplies, mine doesn't have a trimpot so I can't adjust the output. Not sure if yours has it or not. I was wondering if you connected such a beefy PS to a smaller tube, will it damage the tube or will the tube/power supply only allow the required amount of current to flow through the tube?
Cheers,
Rob.
Click to expand...

Mine does not have an accessible pot.

You can damage the laser with too much current.

Also, the tubes output actually goes down with over-powering.

Peace,
dave
 
LSRFAQ said:
Yes its been done. Use a V shape. Powers to 300 mW using specially shaped bores, since HENE mixes need wall collisions to depopulate the lower level.

Ie the bore is star shaped or elliptical for more wall collision area.

Steve
Click to expand...


I remember doing a U shaped 3 tube folded-cavity 20 yrs ago, alignment is a nightmare without special mounts and a super stable table.
 
That laser is fantastic.

I've been wanting a long HeNe like that for a very long time. Great find.

-Trevor
 
LSRFAQ said:
Yes its been done. Use a V shape. Powers to 300 mW using specially shaped bores, since HENE mixes need wall collisions to depopulate the lower level.

Ie the bore is star shaped or elliptical for more wall collision area.

Steve
Click to expand...

As far as i remember, the efficency of He-Ne is also affected from the lenght of the cavity ..... and also, these units have external mirrors to play with ..... i was just wondering about an experiment .....

Coupling them in U shape from the back mirror, matching the total lenght of the cavity with the wavelenght, and also coupling the two beams with a combiner, coupling also here the waves ..... must be a nightmare inside a nightmare, to do, but at the end, the power can be unbelievable, for a He-Ne system ..... :p :D
 
Beautiful piece of equipment!!!

I view gas lasers like these as an art-form. They're beautiful: like old radios from an era when technology had visual appeal and personality.

Jarrod
 
jarrod694 said:
I view gas lasers like these as an art-form. They're beautiful: like old radios from an era when technology had visual appeal and personality.
Click to expand...

I couldn't agree more. A big old gas laser like this looks like what a laser should look like! Big, elaborate glass tubes, glowing electric discharges, huge power resistors and other weird components. DPSS lasers can be so boring to look at; a bunch of rice-grain sized bits of glass epoxied together and crammed into a heatsink.
 
Event_Horizon said:
I couldn't agree more. A big old gas laser like this looks like what a laser should look like! Big, elaborate glass tubes, glowing electric discharges, huge power resistors and other weird components. DPSS lasers can be so boring to look at; a bunch of rice-grain sized bits of glass epoxied together and crammed into a heatsink.
Click to expand...

Couldn't have phased it better myself.....
 
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