Old 08-27-2015, 05:50 AM #1
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Default Need advice on how to test Liconix HeCd with 4240ps

I acquired, by accident really, a Liconix HeCd laser (I think it is a 4207, but I am not at all sure) with a 4240ps. I also have a Scientech power meter (362). I am going to sound like a total n00b, but I am not sure I know how to test the power on the laser with the power meter. Could someone point me to a how-to on that?

Photos make it look pretty straightforward, but I am a metal-milling-CNC-guy. Other than buying a blue laser a while back for fun, I am completely in the dark in this area. Any help would be greatly appreciated.


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Old 08-27-2015, 04:20 PM #2
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Default Re: Need advice on how to test Liconix HeCd with 4240ps

Quote:
Originally Posted by CNC Fanatic View Post
I acquired, by accident really, a Liconix HeCd laser (I think it is a 4207, but I am not at all sure) with a 4240ps. I also have a Scientech power meter (362). I am going to sound like a total n00b, but I am not sure I know how to test the power on the laser with the power meter. Could someone point me to a how-to on that?

Photos make it look pretty straightforward, but I am a metal-milling-CNC-guy. Other than buying a blue laser a while back for fun, I am completely in the dark in this area. Any help would be greatly appreciated.
Set the power meter to the correct range, point the beam at the sensor, read the meter.

Got any pictures of your HeCd? They are great lasers. Make sure you do proper warm up/shut down on it though. They take ~15 minutes to warm up to a proper temperature for lasing and ~15 minutes to cool down properly. Not allowing for a complete cycle can damage the tube.
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Old 08-28-2015, 12:18 AM #3
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Default Re: Need advice on how to test Liconix HeCd with 4240ps

generally true more of the omnichromes than the liconix lasers. the liconix use indirectly heated cathodes, and don't have a shutdown or standby sequence like the omni sort. but I do agree. rapid starting and shutdown wears on the tube faster. Omni tubes have a shutdown cycle to allow the cadmium to vacate the bore and condense in a proper area before the tube extinguishes to keep it off the optics, but liconix claims it doesn't matter and just turns off immediately and relies on a advanced cold trap design to keep it from condensing on the optical surfaces. (which doesn't work as well as they'd like to claim in my opinion)

Be aware that Liconix lasers tend to all be over pressure or out of alignment by this day and age, so don't be surprised if it lights but doesn't lase. most HeCds don't take kindly to being left sitting and hanging out to dry for years at a time. very high quality 441.6nm dark blue-violet beautiful beams unlike anything you can get any other way though. (like with a diode unless you spend some serious money, and even then its debatable) some even lase in the ultraviolet.

I have two Omnichrome HeCds that I love (a series 56 and a series 74). they're among of my absolute favorites. I've worked on quite a few of them so I'll be happy to help anyway I can. I believe Diachi (above) and a couple other members are pretty knowledgeable on them too.
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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
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611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

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641nm: Melles Griot RCS
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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; 05-21-2016 at 03:08 AM.
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