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Old 11-23-2016, 05:37 PM #33
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Default Re: 5000mw(5 watt) green laser emitting dim red light

welp, then it's a DPSS... What's the diffrence between Diode and DPSS if i may ask?


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Old 11-23-2016, 05:40 PM #34
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Default Re: 5000mw(5 watt) green laser emitting dim red light

Lol, I can't believe we've gotten this far and you don't know. A diode uses a chip like an led flashlight to create one wavelength of coherent light. DPSS also know as diode pumped solid state use an infrared diode which produces invisible light. I believe it starts with 808nm and a neodymium doped yttrium aluminum garnet Nd: YAG or a neodymium doped yttrium orthovanadate Nd:YVO4 crystal converts it to 1064nm while another crystal doubles the frequency of the wave to 532nm.
It's a tricky process that results in temperature and physical shock sensitivity.
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Old 11-23-2016, 05:47 PM #35
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Default Re: 5000mw(5 watt) green laser emitting dim red light

Quote:
Originally Posted by TroyRedstone View Post
alright, ive ripped out the entire laser diode from my dead cheapo laser, and it seems there is only a small diode(like any other laser) and a small circuit board(no potmeter, just an LM358 chip and some other stuff. Again, the laser that was in question here. Are you guys sure about ther fact that it was a DPSS laser? And by the way, that laser from gearbest needs 35 days to ship... There goes my hype XD I actually want to spend all money in the shipment so it may arrive in 3-5 days...

Yes, we're sure it's DPSS. There's more than just a diode there.

You can get the same lasers on eBay and a few other places for similar prices, those places may ship faster. They may not. They come from China. That's how it is with cheap Chinese goods and free shipping.

Quote:
Originally Posted by Crazlaser View Post
Lol, I can't believe we've gotten this far and you don't know. A diode uses a chip like an led flashlight to create one wavelength of coherent light. DPSS also know as diode pumped solid state use an infrared diode which produces invisivle light. I believe it starts with 808nm and a crystal converts it to 1064nm while another crystal doubles the wavelength to 532nm.

You are correct, mostly. The KTP (second crystal) halves the wavelength, doubling the frequency. Doubling the wavelength would get you 2128nm.

Cheap Chinese pointers look much like this inside (Actually, even simpler):



The diagram labeled "Second Generation" in this image is more accurate for a cheap Chinese laser these days, although they usually leave out the microlens too in my experience, and the IR filter. The 301s have an expanding lens after the crystal and before the collimating lens.

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Old 11-23-2016, 06:16 PM #36
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Default Re: 5000mw(5 watt) green laser emitting dim red light

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You are correct, mostly. The KTP (second crystal) halves the wavelength, doubling the frequency. Doubling the wavelength would get you 2128nm.
Ahh, corrected. I forgot that. Been a while since chemistry.
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Old 11-23-2016, 06:26 PM #37
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Default Re: 5000mw(5 watt) green laser emitting dim red light

wow, didnt expect that much. anyway, my problems solved itself: it died. so, i want to thank you all for the support and i know im a dick buying shit stuff and asking help here. Again thanks for all the help.
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Old 11-23-2016, 06:33 PM #38
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Default Re: 5000mw(5 watt) green laser emitting dim red light

Quote:
Originally Posted by Crazlaser View Post
Ahh, corrected. I forgot that. Been a while since chemistry.
Physics*...

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wow, didnt expect that much. anyway, my problems solved itself: it died. so, i want to thank you all for the support and i know im a dick buying shit stuff and asking help here. Again thanks for all the help.
No problem!
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Old 11-24-2016, 04:12 AM #39
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Default Re: 5000mw(5 watt) green laser emitting dim red light

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Originally Posted by Crazlaser View Post
Ahh, corrected. I forgot that. Been a while since chemistry.
Did... Did you actually take chemistry?
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Old 11-24-2016, 04:34 AM #40
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Default Re: 5000mw(5 watt) green laser emitting dim red light

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Originally Posted by H2Oxide View Post
Did... Did you actually take chemistry?
Yes. AP chemistry in highschool.

Diachi, not physics. It's taught in physics but also in chemistry to understand atomic structure.

Proof it was in chemistry and not physics. We actually went into quite a lot of detail and I struggled to grasp the concepts.



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Old 11-24-2016, 04:59 AM #41
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Default Re: 5000mw(5 watt) green laser emitting dim red light

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Yes. AP chemistry in highschool.

Diachi, not physics. It's taught in physics but also in chemistry to understand atomic structure.

Proof it was in chemistry and not physics. Sorry the pictures are upside down.
I guess that makes more sense.

Typically not associated with chemistry though, considering how NLO is a branch of optics, which itself is a branch of physics.
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Old 11-24-2016, 06:27 AM #42
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Default Re: 5000mw(5 watt) green laser emitting dim red light

To be totally honest, that chemistry textbook looks like a physics textbook. Technically all sciences eventually crossover each other anyway.
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Old 11-24-2016, 01:17 PM #43
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Default Re: 5000mw(5 watt) green laser emitting dim red light

Certainly is chemistry. Stoichiometry and electron orbits are not covered in physics if I remember correctly.
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Old 11-24-2016, 03:02 PM #44
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Default Re: 5000mw(5 watt) green laser emitting dim red light

Quote:
Originally Posted by CurtisOliver View Post
To be totally honest, that chemistry textbook looks like a physics textbook. Technically all sciences eventually crossover each other anyway.
That's right!

Quote:
Originally Posted by Crazlaser View Post
Certainly is chemistry. Stoichiometry and electron orbits are not covered in physics if I remember correctly.
An understanding of waves and such may be required for Chemistry, but it's usually a physics subject. I certainly don't remember covering it, and I was the top of my year and the year above me at Chemistry (Only A+ that year too ), although I think they just assumed we knew it from the physics classes we had to take at the start of highschool.

Electron orbits come up in physics too actually, electron energy levels are important in many areas - and specifically laser physics, but in other areas too.

Stoichiometry is definitely a purely chemistry sort of thing though.

Science is a wonderful thing that way. As Curtis said, all sciences eventually cross over somewhere.
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Old 11-24-2016, 07:50 PM #45
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Default Re: 5000mw(5 watt) green laser emitting dim red light

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wow, didnt expect that much. anyway, my problems solved itself: it died. so, i want to thank you all for the support and i know im a dick buying shit stuff and asking help here. Again thanks for all the help.
Now you have a new problem, what build to put in that host....
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Old 11-28-2016, 04:45 AM #46
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Default Re: 5000mw(5 watt) green laser emitting dim red light

Quote:
Originally Posted by Crazlaser View Post
If it's the one in his avatar it's a laser 303 and I've never heard of a laser 303 emitting close to 500mw.
Lazerer used to sell a 1W 445nm in a 303 host. I suspect it was probably close to spec back in the days when it was still a good company. I have no idea if they still sell them now. It's a shame I didn't get one.

Be careful with DPSS because the usual safety glasses won't stop the IR component. They only stop the shorter wavelengths. If you use a digital camera to view the IR dot you can see it generally passes right through and is usually well-collimated. Proper safety glasses have to be rated for the IR component as well or else you might be at risk when you think you're safe.
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808nm : SkyLaser HL808 820mW
650nm : [C6] LPC-826 215mW - SkyLaser HL650 175mW - Radio Shack <5mW
638nm : Opnext HL63603TG 190mW - AtlasNova <5mW
632nm : Metrologic ML-868 <5mW - Uniphase 155ASL-1 HeNe 0.95mW
543nm : Melles-Griot 05-LGR-193-497 HeNe 2.4mW
532nm : SkyLaser HL532 w/ IR filter 200mW - Fasttech SD-301 120mW - Lazerer LZCS 105mW - Laser 301 custom mod 85mW - various Laser 301's
520nm : [C6] Osram PL520 110mW - SkyLaser HL520 50mW
450nm : [C6] Osram PL450 260mW - Lazerer LZCS 145mW - SkyLaser HL450 95mW - SkyLaser LP450 90mW
405nm : Laser 303 85mW - Laser 301 90mW

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Last edited by Marco Polo; 11-28-2016 at 04:45 AM.
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Old 11-28-2016, 05:35 AM #47
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Default Re: 5000mw(5 watt) green laser emitting dim red light

Craz Laser, are you CrazyJay back here to play us? Maybe not, but the guy once called me on my cell phone and forgot to turn off his paid for IP fake out service which showed his call coming from Skype in Germany.

Like your avatar showing different colored keys, is that a hint? I am convinced the guy is coming back in here answering his own questions, LOL.... so now I suspect completely innocent newbies to the forum for being him! Imagine that, because I know you aren't doing that, but the choice of name you have here did make me think so at first.
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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.

Useless troll fighting.
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