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Old 03-05-2017, 11:55 AM #81
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

High power DPSS sure beats the pants off of direct to wavelength diodes for beam divergence and quality.


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Old 03-05-2017, 01:02 PM #82
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

It sure does. I'm interesting in the quality of the 532.
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Old 03-05-2017, 05:44 PM #83
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Yeah itll go well above its ratings. its hard on the diodes though. They can each take probably 40 A if theyre the 40W version, but thatd generate crazy heat and may thermal shock the crystals.

I have a couple of these diode bars and it takes alot of effort to cool one properly.
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441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
457.9nm: Argon Ion Line

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Last edited by ultimatekaiser; 03-05-2017 at 05:45 PM.
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Old 03-05-2017, 07:18 PM #84
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

I think you will be very happy once you can get into this and start trying to get all three to work. Even though you were mainly interested in the 561nm, 5 watts of 532nm is nothing to turn your nose up at either. It may be easier to get that one running first before you tackle the 561nm.
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Old 03-05-2017, 08:55 PM #85
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Thank you for running this thread, I've read it with big interest. High power yellow lasers are really very rare, and I am looking forward to seeing how it will work when you make it running.

By the way, the laser lab of our Ophthalmic Research Institute has a 2.2W 578 nm Coherent DPSS laser, it is rumored that in the past there was a CVL machine instead, because the wavelength is identical to yellow CVL line. That is a huge contrast -- the device with the size of a big book does the same as the huge metal cabinet with 3 phase electrical supply, 25 kV inside and water cooling.
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Old 03-05-2017, 09:46 PM #86
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Yeah i know what you're talking about. Probably has an OPSL genesis taipan stuffed in it. Theyre used quite frequently in those machines now in place of CVLs, sometimes with other wavelengths.
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520nm: Trustfire A8 Custom

532nm: CNI MGL-F-3W, Coherent Genesis MX Taipan OPSL, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
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561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm: Coherent Genesis MX Taipan OPSL
583.8nm: DPSS line
586.2nm: DPSS line
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591nm: DPSS line
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594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm: Raman HeNe line?
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632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
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641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
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671nm: CNI PGL-III-C-100
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Old 03-06-2017, 07:07 AM #87
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Laserbuilder, I would like to see that big machine, sounds wonderful, maybe big, but cool. Paul, 5 watts of 532nm is a lot, I don't know what the duty cycle would be at that output, I'd be very happy with half that amount out of this unit.

The 561 is what interests me the most. RHD's relative brightness calculator shows 561 nm as being about 90% as bright as 532, being it is closer to 555 nm which is supposed to be where our eyes are the most sensitive, I don't understand that number.

I am looking forward to working with this and seeing what it can do For now, all I can do is look and learn, produce better photo illustrations:



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Old 03-06-2017, 03:25 PM #88
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

How are those lasers cooled down?
Looks that every crystal and diode mount have own TECs. Where heat dissipates from them? Just a huge case with a fan or fans under?
Do you know the material of the housing?
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Old 03-06-2017, 03:40 PM #89
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Each 808 nm laser diode and KTP crystal has its own TEC under them to regulate their temperatures, there are aluminum heat sinks below the platform but I haven't seen what is happening yet, I assumed each TEC has its own heat sink below the platform, but I don't really know. I purchased this and had it sent home to Alaska, my wife took the pictures. I haven't had a chance to see it except through photographs.
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

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Old 04-06-2017, 02:53 PM #90
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Damn, I wanted to stop spending money on these things for awhile, I guess next month: Lumenis Varia: Loaded Laser Chamber Setup - Coherent LASER setup | eBay
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To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

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Old 04-06-2017, 03:15 PM #91
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

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Originally Posted by Alaskan View Post
Damn, I wanted to stop spending money on these things for awhile, I guess next month: Lumenis Varia: Loaded Laser Chamber Setup - Coherent LASER setup | eBay

...Did you buy the second one? I saw that yesterday, briefly considered it, then remembered I don't really have $1250 (CAD) to spend on toys.
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Old 04-06-2017, 03:48 PM #92
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Yea, he accepted $650 USD for it. Damn it!
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Old 04-06-2017, 04:03 PM #93
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Quote:
Originally Posted by Alaskan View Post
Yea, he accepted $650 USD for it. Damn it!

Damn, you're going to have an absurd stack of parts waiting for you when you get back!

Here, throw this in too: Laser Export LCM-DTL-374QT LASER HEAD AND POWER SUPPLY | eBay

Q-switched 355nm laser, can be converted to 532/1064nm fairly easily as well as 355/532/1064 all at once.

Made the seller an offer and he countered with $600, too high for me just now though I'd love to get my hands on one of those.
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405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



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Old 04-06-2017, 04:21 PM #94
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Don't tempt me, I've done enough damage already. However, isn't that kind of low power, even at 10 ns? What is inside those?
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"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

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Old 04-06-2017, 04:31 PM #95
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Quote:
Originally Posted by Alaskan View Post
Don't tempt me, I've done enough damage already. However, isn't that kind of low power, even at 10 ns? What is inside those?

Krazer actually has one, and there's some information about them on the FAQ.

Link: LCM-DTL-347QT

Seems they'll do 100mW 355, 100mW 532nm, 100mW 1064nm all at once once you take out the separation prism on the output.

If you take out the 355nm stage the 532/1064 power goes up, and if you take out the 532 stage the 1064 power goes up even more, up to around 0.5W average. Not a ton of power, but seeing as it's Q-switched it'll allow for some uses that a CW laser of the same power wouldn't.

These were going really cheap a few years ago, annoyed that I missed out back then!
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405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<


Last edited by diachi; 04-06-2017 at 04:31 PM.
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Old 04-06-2017, 04:40 PM #96
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Default Re: 561nm Yellow YAG (?) from Lumenis Varia Eye Laser

50 kilowatt peak pulsed 1064nm is cool, I guess it is a find after all. I want it, but no way, spent too much this month already, I should be ashamed of myself, came over to Iraq to make money for saving, not spending.
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To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

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