Old 04-08-2016, 07:45 PM #1
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Default So is 473nm DPSS just obsolete now?

As far as the hobbyist community is concerned of course. I'm sure they must still have some lab uses.

I recently picked up this 5W 465nm build from alien laser and my eyes honestly cannot tell the difference between this color and the color my blue RPL put out(before I re purposed the host) It's pure bright blue without a hint of purple. Looks indistinguishable from 473 except for being several hundred times more powerful.

Pros of 465nm:
Better stability.
Cheaper.
Much much much higher output.
No need for exotic crystals that go bad over time or anything like that.

Cons:
Bad beam specs.
Higher power units like this one heat up quickly and only have a duty cycle of around 30 seconds.

I suppose I would need to see what this wavelength looks like in the more conservative 1 watt range. I understand that the wavelength drifts upwards at higher output levels.


Blasting a tree 150-200 feet away with 5 watts of blue



Last edited by Razako; 04-08-2016 at 07:46 PM.
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Old 04-08-2016, 08:06 PM #2
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Default Re: So is 473nm DPSS just obsolete now?

You choose the tool for the application they're both very important.

473 has lots of uses, including high speed printing, spectral references, holography and image reproduction, scanning and interferometry, bioflorescence, spectroscopy, forensics, and more....

457 and 488 are also often used as well for these applications. mostly florescence an imaging stuff though with these shorter wavelengths. They're mostly Argon Ion and Helium Cadmium (442nm) laser replacements.

And with -lots- of work, both can be stabilized to various degrees and cleaned up, its just often not practical with diodes; and too expensive as diodes are meant to be lower cost in the first place...so it defeats the purpose in many cases to make these big fancy electronics when you can generally make a DPSSL that's close in wavelength for similar cost and get the superior beam out of it. I digress though, as really it just depends on what your application is, and what its tolerance limits are.
__________________
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-473-5
476.5nm: Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics Cyan 488-20 DECSL, 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: 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 561-100
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

Last edited by ultimatekaiser; 04-08-2016 at 08:36 PM.
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