Old 08-11-2013, 01:27 AM #1
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Default The He-Ne breakdown

I was bored... So I made an educational video describing the breakdown of a basic 632.8nm HeNe.

Rough in the beginning, but I get there around a couple minutes in. Enjoy! Post any questions you may have

Also, website is available here as an IP. Still waiting on the ISP's coffee to kick in...



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442nm 15mW Melles Griot HeCd
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455nm 100mW LaserBTB
457nm Tunable OMNI 532
465nm Tunable OMNI 532
467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
488nm Single line 35mW
496nm Tunable OMNI 532
502nm Tunable OMNI 532
514nm Tunable OMNI 532
520nm 40mW MSV2
532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
589nm 126mW PGL-III-C
594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
629nm <1mW Raman 6 line
633nm 1-4mw red HeNe
635nm Raman 6 line
638nm 20mW single mode
640nm Raman 6 line
647nm ~10mW ArKr whitelight Kr line
650nm Raman 6 line
658nm LPC-826
685nm 20mW
808nm Modded NewWish pen


HeNe/gas reference thread

Last edited by bloompyle; 08-11-2013 at 01:29 AM.
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Old 08-11-2013, 01:59 AM #2
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Default Re: The He-Ne breakdown

Awesome! Very informative.

Seems like a tunable hene is something a hobbyist could build if you had a tube with brewsters on each end. Is that hard to find?

Now i'm off to read your site
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Old 08-11-2013, 02:03 AM #3
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Default Re: The He-Ne breakdown

Only one brewster window is needed.

Perhaps I should mention this isn't something you can do overnight. You're going to need a 1B tube, a mounting rail for the tube, and a mirror mount that will adjust the mirrors. Getting it perfectly inline is not a game
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405nm 500mW
442nm 15mW Melles Griot HeCd
445nm 1W
455nm 100mW LaserBTB
457nm Tunable OMNI 532
465nm Tunable OMNI 532
467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
488nm Single line 35mW
496nm Tunable OMNI 532
502nm Tunable OMNI 532
514nm Tunable OMNI 532
520nm 40mW MSV2
532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
589nm 126mW PGL-III-C
594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
629nm <1mW Raman 6 line
633nm 1-4mw red HeNe
635nm Raman 6 line
638nm 20mW single mode
640nm Raman 6 line
647nm ~10mW ArKr whitelight Kr line
650nm Raman 6 line
658nm LPC-826
685nm 20mW
808nm Modded NewWish pen


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Old 08-11-2013, 02:16 AM #4
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Default Re: The He-Ne breakdown

Great stuff. Was just explaining this myself about an hour ago to a co-worker. Very fast and simple terms, and very informative. Thanks for the video bloom.
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Old 08-11-2013, 02:27 AM #5
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Default Re: The He-Ne breakdown

I was thinking both ends so you can use different OCs. Or can you get one with an OC that covers all hene lines?
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Old 08-11-2013, 02:30 AM #6
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Default Re: The He-Ne breakdown

Well if it's a brewster tube, then there's no point in building it with a narrow OC, otherwise the brewster window is pointless because you're just adjusting it to get something you could have already bought, without it being specially made.

Chances are very likely that the OC is already broadband.

Plus, lining up 2 mirrors? It's not like you have a beam to try to line up. There won't be a beam until you line up the mirrors

All lines is improbable. For a 543nm you need a slightly altered gas mixture. The REO LSTP uses a process that I have now forgotten. I will find it though. Not really set in stone, only theorized. Anyway, at best you can get lines from 594 and up.

That being said, my REO 61nm is the only tube Sam has heard of that lases yellow from a non yellow tube. So best of luck, 612 is easy in the grand scheme of things. 604 is luck, 635nm and 640nm are close to guaranteed, beyond that it's luck again.
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405nm 500mW
442nm 15mW Melles Griot HeCd
445nm 1W
455nm 100mW LaserBTB
457nm Tunable OMNI 532
465nm Tunable OMNI 532
467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
488nm Single line 35mW
496nm Tunable OMNI 532
502nm Tunable OMNI 532
514nm Tunable OMNI 532
520nm 40mW MSV2
532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
589nm 126mW PGL-III-C
594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
629nm <1mW Raman 6 line
633nm 1-4mw red HeNe
635nm Raman 6 line
638nm 20mW single mode
640nm Raman 6 line
647nm ~10mW ArKr whitelight Kr line
650nm Raman 6 line
658nm LPC-826
685nm 20mW
808nm Modded NewWish pen


HeNe/gas reference thread

Last edited by bloompyle; 08-11-2013 at 02:33 AM.
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