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Old 01-12-2014, 12:57 AM #17
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Default Re: Science fair

That's what he meant. An argon runs at 4-10 amps. It fryeth thy operator easy. And a hene.is safe as long as you don't touch the anode while charged/running.


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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: Argon Ion Line

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

483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser, Coherent Sapphire 488-20 OPSL

496.5nm: Argon Ion Line
501.7: Argon Ion Line
514.5nm: Argon Ion Line
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
Melles Griot LGB-563 HeNe

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
588.6nm: CNI PGL-M-80

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

604.6nm: LOR-150 HeNe line
609nm: Raman 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
659.6nm: Laser Quantum IGNIS DPSS laser 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
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 01-13-2014, 02:54 PM #18
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Default Re: Science fair

HeNe for transparency, can show parts, point them out, see the plasma. HeNe out of teh box is often enclosed in a metal enclosure, though :-/ Upside is that they rarely come in powers high enough to burn or damage anything without some external lenses. You can then focus on other interesting properties of lasers. You could set up a single slit setup, or an interferometer or something cool like that. No danger involved!

TEA N2 laser, high voltage dangers, but very simple laser that you build yourself. Downside, no cavity mirrors, so not the best teaching aid. Also, loud, can produce ozone, produces UV radiation.
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Old 01-13-2014, 05:44 PM #19
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Default Re: Science fair

I think that perhaps a cavity mirror setup deal would be a good idea the variable of location/distance and then the output effect, the type of laser to use would be the next question, and again it would be necessary to locate some equipment. I believe there is a spectrometer I could find at school but laser power meter would be the unknown. I think that it would be best for it to be a visible laser so that brings in a frequency doubler unless there is a better source. Also if gas laser, since is power by electricity is okay, then would it be better to use flashlamp or pumping laser to power it? Again depends on item. What would be the best to show and explain?
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Old 01-13-2014, 11:30 PM #20
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Default Re: Science fair

Quote:
Also if gas laser, since is power by electricity is okay, then would it be better to use flashlamp or pumping laser to power it? Again depends on item. What would be the best to show and explain?
This statement scares me.
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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: Argon Ion Line

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

483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser, Coherent Sapphire 488-20 OPSL

496.5nm: Argon Ion Line
501.7: Argon Ion Line
514.5nm: Argon Ion Line
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
Melles Griot LGB-563 HeNe

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
588.6nm: CNI PGL-M-80

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

604.6nm: LOR-150 HeNe line
609nm: Raman 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
659.6nm: Laser Quantum IGNIS DPSS laser 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
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 01-14-2014, 12:42 AM #21
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Default Re: Science fair

Yea sorry that does not sound right. I meant to say that a gas laser is obviously powered by electrical discharge. A solidstate laser is not. Is it better to use flash/arclamp or diode pumping. I get that the are perks to each but which would be best in your opinion. I messed up and mixed up what I was trying to say, please don't judge me);
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Old 01-14-2014, 01:16 AM #22
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Default Re: Science fair

a pulsed solid state laser is dangerous and definitely not a beginner's laser (speaking with experience) ...but getting over that fact, diodes are generally better if you can afford them for most general cases, they're smaller, lower power and cooler and thus more efficient, allowing for longer run times. Flashlamps have a few advantages, but as a general whole...diode arrays are better if you have good alignment. aligning PSS YAG lasers is difficult though to say the least, and I'd discourage this as an idea, as they're very unforgiving. they blind and scald instantly, and many components can't be touched with your bare hands, high voltages are present, and the optics have to be absolutely pristine at all times, and if they're even slightly misaligned, you can even blow holes in the mirror coatings on the first try.
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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: Argon Ion Line

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

483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser, Coherent Sapphire 488-20 OPSL

496.5nm: Argon Ion Line
501.7: Argon Ion Line
514.5nm: Argon Ion Line
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
Melles Griot LGB-563 HeNe

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
588.6nm: CNI PGL-M-80

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

604.6nm: LOR-150 HeNe line
609nm: Raman 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
659.6nm: Laser Quantum IGNIS DPSS laser 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
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 01-14-2014, 11:33 AM #23
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Default Re: Science fair

That sounds good.
Would it be better to be pulsed or cw or quasicw?

Last edited by DoctorEvil; 01-14-2014 at 11:34 AM.
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Old 01-14-2014, 02:32 PM #24
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Default Re: Science fair

Get some 532nm lasers, take them apart and setup a nice display of them in action. From this point your nearly limitless on what you can make your project about. Current regulation, mechanics of the diode, optics, frequency changing in the crystal, light interference, ect.... Plenty to fill some poster board. Inexpensive and practical.
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Old 01-14-2014, 02:59 PM #25
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Default Re: Science fair

The issue though is he is entering into a SCIENCE fair, it's not an ENGINEERING or TECHNOLOGY fair.

Not the same thing. We need to help DoctorEvil come up with a hypothesis, and then a method to test it.





Now, with the nominal state of the education system these days (as it was when I was in it in the 70's, 80's and first year of the 90's) if you just have enough whiz-bang flim-flam and display knowledge, but no actual hypothesis, experimentation, observation, controls, and results, sometimes you still just a squeal of approval from the teachers.

However, I've seen it where the kid with the worst backboard, and the sloppiest presentation, and the most boring subject got the best grade, because he at least had a testable hypothesis.
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Old 01-14-2014, 05:54 PM #26
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Default Re: Science fair

Thanks ah that is exactly my point/problem.
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Old 01-14-2014, 08:50 PM #27
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Default Re: Science fair

Well, what are some interesting myths or urban legends about lasers? You can attempt to prove or disprove it. You don't want to get so scientific that you bore your classmates and teacher.
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Old 01-15-2014, 03:23 PM #28
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Default Re: Science fair

I highly doubt that they will be bored due to that.
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