Old 12-15-2014, 07:18 AM #1
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Cool Long term project...FINISHED [pic heavy]

WARNING: The following content may contain awesome or otherwise blow your mind! Not responsible for lost brain cells or possible drooling that may occur

Ok, now that that's out of the way...

At long last....I have fully restored my old 1995 Omni 643-RYB head into full operation!







I purchased this head a long time ago. and It has long since been my dream to own a whitelight gas laser. A while back I managed to pick up this head for about $600 from a retired lab at a university and was assured it was working. I got it and quickly found that the head had a rattle in the cathode, and the power supply switch broke on me (some of you may know already about this)

Luckily I found another of the same supply shortly thereafter by total chance for another $100 and bought it. It wasn't in quite as nice a cosmetic shape, but a quick test found it to be working and it lit the head with minimal issues, despite it being shelved for a long time. (7 months ish with about 1124 hours IIRC) I assume the clinking in the cathode is the getter having popped off and wandering around but I can't be sure.

I quickly found that the output was weak, struggling to get even a few mW of 568nm. After tweaking, I got about 9mW, and it was a disaster....a speckled mess. After finally finding all the allens needed, I disassembled it fully and cleaned the mirrors, as well as the pickoff. It turned out that the light feedback pickoff was so dirty, it appeared sandblasted and totally ruined, and even rough to the touch. Acetone and methonol had minimal effect so i bathed it in running water and hand detergent and gently used my thumb, and after several gentle washes it was pretty much immaculate again. Re-installed everything, re-aligned it and tweaked it for max power. A whopping clean 36mW finally! fairly respectable despite its age.

Top to bottom: 568,496,488,483,476nm


But wait...its an RYB head...I should be getting Red too...

After some probing with my trusty red SP-120 which I had running happily on my desk at the time, I found that the HR was passing red quite a lot, despite the OC reflecting Red. Its optics (or at least the HR) had been swapped out! Whoever the last person to use it was, had probably changed the mirrors for an experiment, and not swapped them back before it got sold/put into storage. I despaired...new whitelight optics are VERY expensive.

but then...the impossible happened.

Ionlaser555 here got 2 mixed gasses, but no power supplies. We had began talking by coincidence and found that his two heads were an 568 head, and an RYB that was no longer gas intact! I eventually worked up the courage to ask after thinking about it for a while and flipped out when he said he'd sell me the RYB optics. I eagerly pay, and then await them in the mail. After another full cleaning and a swap of mirrors I'm now lasing nearly 40mW of White! So I'd like to take the time to thank him for his contribution. I couldn't have done it without you!

Finally!



Full output top to bottom: 647,568,488,483,476nm


And I even get 676 to pop in under the right circumstances. (not shown) The more I run it, the more it seems to pick itself up off the ground.

With a second OC mirror I have for this laser, (nearly the same as the HR in fact) I can create an intracavity white-light. This also allows an additional gain to show through and I can recouple it broadband to get all of the lines, though weaker, and at the expense of their beam profiles.



Full intracavity output top to bottom: 676,647,568,502,496,488,483,476,472nm


And I even occasionally got 515 and 467 to flicker in occasionally on a very stable surface.

Not too shabby for a old clunker eh?


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405nm: Melles Griot RCS
430nm: Coherent D3 430-10
441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
457.9nm: Uniphase 2214-40MLA Argon Ion Line

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, CNI GLP-473
476.5nm: Uniphase 2214-40MLA Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Uniphase 2214-40MLA Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser

496.5nm: Uniphase 2214-40MLA Argon Ion Line
501.7: Uniphase 2214-40MLA Argon Ion Line
514.5nm: Uniphase 2214-40MLA Argon Ion Line
520nm: Trustfire A8 Custom

532nm: CNI MGL-F-3W, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm
583.8nm
586.2nm
588.6nm: CNI PGL-M-80

591nm
593.5nm CNI MGL-H-50 Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm REO LHYR-250M HeNe line
611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.3nm: Laser Quantum IGNIS 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1153nm: SP-120 alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors

Last edited by ultimatekaiser; 12-15-2014 at 07:19 AM.
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Old 12-15-2014, 02:59 PM #2
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Default Re: Long term project...FINISHED [pic heavy]

Awesome! A white laser! Always wanted one of those! Now to build a handheld one

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Old 12-15-2014, 04:29 PM #3
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Default Re: Long term project...FINISHED [pic heavy]

Wow!!!!

Just... Wow!

And yes, Mr. 555 is an awesome guy.
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Old 12-16-2014, 01:19 AM #4
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Default Re: Long term project...FINISHED [pic heavy]

Sweet
Its always weird to me to see white light coming out of a gasser- I tend to thing of gas lasers as covering only one narrow part of the spectrum. Pretty sweet to see these

edit: I see that 593.5 in your sig...is that the ebay unit you snagged? Can we expect a thread on that? Pleeeeease?

Last edited by crazyspaz; 12-16-2014 at 01:28 AM. Reason: nvm figured it out. Oh look another question.
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Old 12-16-2014, 01:46 AM #5
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Default Re: Long term project...FINISHED [pic heavy]

No it's a different unit. It's a custom H model one, and yes you will. I just re-tuned it and it hits about 65-70 mW stable.
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457.9nm: Uniphase 2214-40MLA Argon Ion Line

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473nm: CNI MGL-473-100, CNI GLP-473
476.5nm: Uniphase 2214-40MLA Argon Ion Line

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488nm: Uniphase 2214-40MLA Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser

496.5nm: Uniphase 2214-40MLA Argon Ion Line
501.7: Uniphase 2214-40MLA Argon Ion Line
514.5nm: Uniphase 2214-40MLA Argon Ion Line
520nm: Trustfire A8 Custom

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561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm
583.8nm
586.2nm
588.6nm: CNI PGL-M-80

591nm
593.5nm CNI MGL-H-50 Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm REO LHYR-250M HeNe line
611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.3nm: Laser Quantum IGNIS 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1153nm: SP-120 alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 12-16-2014, 02:39 AM #6
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Default Re: Long term project...FINISHED [pic heavy]

Very jealous


sounds and looks like it was worth the effort.

nice white light
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Old 12-16-2014, 03:04 AM #7
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Default Re: Long term project...FINISHED [pic heavy]

Amazing laser! A white light Ar-KR is still on my laser bucket list.
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Old 12-16-2014, 03:15 AM #8
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Default Re: Long term project...FINISHED [pic heavy]

Thanks guys for the responses. It's nice to share after so much hard work. I still need to clean the brewsters. Sam just recommended that I do. so I may post the results when I get around to it.
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375nm: Melles Griot RCS-007

405nm: Melles Griot RCS
430nm: Coherent D3 430-10
441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
457.9nm: Uniphase 2214-40MLA Argon Ion Line

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, CNI GLP-473
476.5nm: Uniphase 2214-40MLA Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Uniphase 2214-40MLA Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser

496.5nm: Uniphase 2214-40MLA Argon Ion Line
501.7: Uniphase 2214-40MLA Argon Ion Line
514.5nm: Uniphase 2214-40MLA Argon Ion Line
520nm: Trustfire A8 Custom

532nm: CNI MGL-F-3W, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm
583.8nm
586.2nm
588.6nm: CNI PGL-M-80

591nm
593.5nm CNI MGL-H-50 Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm REO LHYR-250M HeNe line
611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.3nm: Laser Quantum IGNIS 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1153nm: SP-120 alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors

Last edited by ultimatekaiser; 12-17-2014 at 03:37 AM.
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Old 12-16-2014, 04:05 AM #9
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Default Re: Long term project...FINISHED [pic heavy]

Aww, it's so pretty!

One day...

Good job on this! I am immensely jealous.
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Old 12-16-2014, 02:23 PM #10
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Default Re: Long term project...FINISHED [pic heavy]

Beautiful machine, thanks for sharing.
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Old 12-17-2014, 02:55 AM #11
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Default Re: Long term project...FINISHED [pic heavy]

Very nice, Thanks for warning us all before you started the announcement
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Noteworthy Lasers and λ's:
685nm: 24mW pointer pen
660nm: 230mW LPC-826
647.1nm: Omnichrome 643 Ar/Kr ion 5-line max (high hours)
638nm: 600mW Kryton Groove
635nm: 5.8mW DIY pointer pen 0.6mrad
632.8nm: 20mW HeNe SP-107 - 6mW Hughes 3225H-C made in 1980.
594.1nm: 4.1mW Coherent HeNe from Sigurthr - 1.7mW HeNe REO-LHYR-0050M
568.2nm: Ar/Kr
543.5nm: 3.1mW Coherent HeNe
537nm / 542nm / 545nm / 550nm multi-line DPSS +/- 1nm
532nm: 500mw CNI PGL-III-C
515nm: 36mW laserBtB
514.5nm/501.7nm/496.5nm /488.0nm/476.5nm/457.9nm 2214-40MLA Argon Ion
462nm: 2W M462 Kryton Groove
450nm: 94mW laserBtB
445nm: 2.5W NDB7875 Kryton Groove - 40mW Pen laser using NDB7242E diode
405nm: 100mW PHR-805T

Building: 337.1nm: TEA laser

"Fiat Lux" - preferably laser light.
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Old 12-17-2014, 03:36 AM #12
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Default Re: Long term project...FINISHED [pic heavy]

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Originally Posted by Mattronium View Post
Very nice, Thanks for warning us all before you started the announcement
Thanks, I thought it was funny and would give people a smile before reading so much

Last edited by ultimatekaiser; 07-14-2015 at 11:46 PM.
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Old 12-17-2014, 11:24 AM #13
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Default Re: Long term project...FINISHED [pic heavy]

Very nice laser head! I especially love the history behind it.

in the past I had a Melles Griot 643 Whitelight-Laser ArKr. It was a beauty, but I gave it away to another laser-freak, because I didn't had the time for periodic runs and the tube pressure got higher and higher. Nevertheless, some argon ion lasers I still have and of course the HeNes and DPSS lab-lasers.

Wish you a lot of fun with your white beam :-)

Best regards
argon
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Last edited by argon; 12-17-2014 at 11:25 AM.
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Old 12-17-2014, 02:12 PM #14
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Default Re: Long term project...FINISHED [pic heavy]

White beam with better specs than a knife-edged diy! Congrats, on the hard work paying off.
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650nm - 260mw in MXDL host with brass heatsink
650nm - 325mw in stainless Raygun host. The dot is so bright it's
PINK/ORANGE!
Thanks Jay! Thanks Drew! Thanks Larry! Thanks Glenn! Thanks Dave!

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Old 12-17-2014, 06:28 PM #15
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Default Re: Long term project...FINISHED [pic heavy]

Quote:
Originally Posted by argon View Post
Very nice laser head! I especially love the history behind it.

in the past I had a Melles Griot 643 Whitelight-Laser ArKr. It was a beauty, but I gave it away to another laser-freak, because I didn't had the time for periodic runs and the tube pressure got higher and higher. Nevertheless, some argon ion lasers I still have and of course the HeNes and DPSS lab-lasers.

Wish you a lot of fun with your white beam :-)

Best regards
argon
Thanks. It's nice to have an appreciation for these. I love them. I enjoy running labbies, but they're expensive to get a lot of the time. Gotta get lucky.
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325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

405nm: Melles Griot RCS
430nm: Coherent D3 430-10
441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
457.9nm: Uniphase 2214-40MLA Argon Ion Line

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, CNI GLP-473
476.5nm: Uniphase 2214-40MLA Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Uniphase 2214-40MLA Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser

496.5nm: Uniphase 2214-40MLA Argon Ion Line
501.7: Uniphase 2214-40MLA Argon Ion Line
514.5nm: Uniphase 2214-40MLA Argon Ion Line
520nm: Trustfire A8 Custom

532nm: CNI MGL-F-3W, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm
583.8nm
586.2nm
588.6nm: CNI PGL-M-80

591nm
593.5nm CNI MGL-H-50 Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm REO LHYR-250M HeNe line
611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.3nm: Laser Quantum IGNIS 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1153nm: SP-120 alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 12-19-2014, 03:46 AM #16
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Default Re: Long term project...FINISHED [pic heavy]

Quote:
Originally Posted by ultimatekaiser View Post
Thanks. It's nice to have an appreciation for these. I love them. I enjoy running labbies, but they're expensive to get a lot of the time. Gotta get lucky.
From your list in the sig, it seems you get lucky a lot. No pun intended
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