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Old 02-10-2010, 11:39 PM #17
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Default Re: Dropped laser. Now not working. Help?

It looks like the crystal was glued on. If you can get the remnants of the glue 'lined up', you might be okay.

I'd be interested to see if it'll generate any green light if you do that. Be careful with the 808nm IR though; thats going to be a LOT higher power than the 50mw that laser was originally rated at.

Do not look into it. Even a very dim dot of 808 may be 200mW. You can get IR blocking goggles for around $25, -- especially with IR, don't mess with that, since you don't even know if you're getting a specular reflection at the time, and there is no blink reflex.


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3392nm:REO LHIP HeNe 2mW ∙ 980nm:OLIKE 155mW

808nm:OLIKE 200mW ∙ JETL PLC 600mW(682pk)
780nm:OLIKE 120mW
685nm:18650 47mW
671nm:PGL3M 281mW DPSS ∙ PGL3C 278mW
655nm:LOC 254mW ∙ OLIKE 221mW ∙ Yob 320mW
638nm:Sanyo 40mW ∙ HL63133 200mW ∙ PGL3C 463mWpk ∙ ML520 700mW
633nm:JDS1145 HeNe 28mW ∙ JDS1145 HeNe 26mW
612nm:MG 05LOR151 HeNe 3mW ∙ REO LSTP 3mW
609nm:REO LHOR 1mW
604nm:REO LSTP 2mW
594nm:Rigel 3mW ∙ LG PGL3C 15mWpk ∙ Lasos 7512 3mW ∙ CNI MGL3 58mWpk
589nm:CNI PGL3C 106mW ∙ CNI PGL3C 85mW
561nm:CNI PGL3C 30mW(41pk)
556nm:CNI PGL3C 20mW(22pk)
544nm:JDS1675P HeNe 2mW ∙ REO LHGR 2mW ∙ Lasos 7786 2mW
532nm:PGL3C 150mW(180pk) ∙ PGL3C 578mWpk ∙ PLC 440mWpk
515nm:JDS 221420GL ArI 30mW
510nm:52mW DG#2 ∙ 50mW 26650 DG
488nm:Nlx DPSS 7mW ∙ JDS 2214 ArI 40mW ∙ JDS FCD488 DPSS 25mW
ML:MG 65A106025 ArI ML 115mW
476/480nm:Nichia Diode 28mW
473nm:PGL3A 45mW(80pk) ∙ PGL3C 110mWpk ∙ PGL3C 95mWpk ∙ RPLB-25 60mWpk
465nm:DTR NDB7676 2.03w
458nm:JDS 2214VL ArI 8mW ∙ JDS 2214VL ArI 12mW ∙ RHD Diode 1.7W
452nm:Osram SM 47mW
445nm:Yob 1410mW ∙ Polaris 156mW ∙ PGL3C 1200mW ∙ DTR-EHG 32650 2136mW
405nm:Yob 630mW ∙ Qfox 750mW ∙ JETL PLC 780mW
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Old 02-11-2010, 10:19 PM #18
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Default Re: Dropped laser. Now not working. Help?

Yeah, it was definitely glued. Peice of crap.


Does that mean it's unsafe to look at the dot it produces on matte surfaces?

Because it's... maybe a little late for that

Alright, i confess! I've been trying to make it burn. I set up a small cardboard radiation sheild out of a cardboard box which i cut a hole in the size of my cellphone screen. I set my phone on camera then celotape it to the hole so i can see the screen. I've lined up a match on a little stand and wrapped a cabletie around the laser button to hold it down. It's on as i type this, and doesn't seem to want to burn... guess it's not that powerful. Or really divergeant. Or, most likely, both. Mehh...

Any other fun uses for an IR laser? I will try to get green from it as soon as i have the time and energy.
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Old 02-11-2010, 10:31 PM #19
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Default Re: Dropped laser. Now not working. Help?

It's not unsafe to look at the dot. Just don't stare into it to 'see if it's working' (something i've seen people do with broken greens ... ) But be careful of specular reflections. You won't see them happening.

Unless something else was knocked out of alignment, it's probably not that divergent. You can check it by looking at it via a cel phone camera or a digital camera with 'night shot' mode, if you have one. While the output from a pump diode for 532 should be enough to burn, it still may have to be focused somewhat more for that to happen.

Depending on what crystals were removed, you're probably getting 1064nm, not 808nm. If you can see a dim red dot, that's 808. If you can only see it on a camera, that's likely 1064, but the ability of CCD sensors to 'see' stops at about 1100, so it'll still be fairly dim.

You can also get an indicator card which will respond to IR. But unfortunately, as far as I know, beyond burning, and beyond 808nm, IR gets pretty dangerous and boring at the same time.
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3392nm:REO LHIP HeNe 2mW ∙ 980nm:OLIKE 155mW

808nm:OLIKE 200mW ∙ JETL PLC 600mW(682pk)
780nm:OLIKE 120mW
685nm:18650 47mW
671nm:PGL3M 281mW DPSS ∙ PGL3C 278mW
655nm:LOC 254mW ∙ OLIKE 221mW ∙ Yob 320mW
638nm:Sanyo 40mW ∙ HL63133 200mW ∙ PGL3C 463mWpk ∙ ML520 700mW
633nm:JDS1145 HeNe 28mW ∙ JDS1145 HeNe 26mW
612nm:MG 05LOR151 HeNe 3mW ∙ REO LSTP 3mW
609nm:REO LHOR 1mW
604nm:REO LSTP 2mW
594nm:Rigel 3mW ∙ LG PGL3C 15mWpk ∙ Lasos 7512 3mW ∙ CNI MGL3 58mWpk
589nm:CNI PGL3C 106mW ∙ CNI PGL3C 85mW
561nm:CNI PGL3C 30mW(41pk)
556nm:CNI PGL3C 20mW(22pk)
544nm:JDS1675P HeNe 2mW ∙ REO LHGR 2mW ∙ Lasos 7786 2mW
532nm:PGL3C 150mW(180pk) ∙ PGL3C 578mWpk ∙ PLC 440mWpk
515nm:JDS 221420GL ArI 30mW
510nm:52mW DG#2 ∙ 50mW 26650 DG
488nm:Nlx DPSS 7mW ∙ JDS 2214 ArI 40mW ∙ JDS FCD488 DPSS 25mW
ML:MG 65A106025 ArI ML 115mW
476/480nm:Nichia Diode 28mW
473nm:PGL3A 45mW(80pk) ∙ PGL3C 110mWpk ∙ PGL3C 95mWpk ∙ RPLB-25 60mWpk
465nm:DTR NDB7676 2.03w
458nm:JDS 2214VL ArI 8mW ∙ JDS 2214VL ArI 12mW ∙ RHD Diode 1.7W
452nm:Osram SM 47mW
445nm:Yob 1410mW ∙ Polaris 156mW ∙ PGL3C 1200mW ∙ DTR-EHG 32650 2136mW
405nm:Yob 630mW ∙ Qfox 750mW ∙ JETL PLC 780mW

Last edited by aryntha; 02-21-2010 at 10:11 PM. Reason: misspelled, and meant stopped, not peaked.
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Old 02-21-2010, 09:16 PM #20
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Default Re: Dropped laser. Now not working. Help?

CCD's already quit after about 1100nm. If you want to burn, remove the crystals if they aren't aligned anyway and directly focus the 808nm pump diode. Even a 1mW pointer pump diode can burn.
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Old 02-21-2010, 09:21 PM #21
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Default Re: Dropped laser. Now not working. Help?

I tried re-aligning the crystal assembly. It works, but is a lot less powerful and the point it produces is now a lot more... smudgy. Not sure about more divergent but the point it produces is bigger and messier. I used the residue glue from the joint that was present before, which there wasn't much of, meaning it's very fragile. What's the best way to stick it back (that's easy to do)? Tape? ...lol...
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Old 02-21-2010, 09:21 PM #22
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Default Re: Dropped laser. Now not working. Help?

Quote:
Originally Posted by JaiNobeZ View Post
my Physics teacher said glass has a really high IR absorbancy so (my reasoning is) a magnifying glass wouldn't work.
Glass is actually quite transparent up to and beyond 1200nm, it's only when you start reaching much deeper into the IR spectrum that it is absorbed by glass. A CO2 laser operating at 10,600nm will melt glass, but to all diode wavelengths I know of, glass is pretty transparent.
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Old 02-21-2010, 09:23 PM #23
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Default Re: Dropped laser. Now not working. Help?

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CCD's already quit after about 1100nm. If you want to burn, remove the crystals if they aren't aligned anyway and directly focus the 808nm pump diode. Even a 1mW pointer pump diode can burn.
I did. What should i use to focus it? As it is i can't get it to burn.
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Old 02-21-2010, 09:33 PM #24
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Default Re: Dropped laser. Now not working. Help?

Add a lens. You can remove everything after the diode and use a strong positive lens. Be carefull with the open can diode, it's fragile.
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Old 02-23-2010, 08:06 PM #25
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Default Re: Dropped laser. Now not working. Help?

Tried that. My problem wasn't (necessarily) that it didn't work, but that i couldn't tell whether it was more focussed, less focussed, where the focal point was, etc. I did it when i was using my afformentioned cardboard radiation shield.

And thanks for telling me it's fragile. I'd probably have broken it permanently sooner or later if you hadn't told me.
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Old 02-24-2010, 09:31 PM #26
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Default Re: Dropped laser. Now not working. Help?

Alright, my current question is, what's the best way to reattach the crystal assembly to the diode? I'm tempted to use tape temporarily (like i did for the infrared filter & the button that fell out) but it seems like it might do something bad that's beyond my understanding. My dad suggested Epoxy resin, but he's a carpenter so he would. Atm that's my choice.

Any better suggestions?
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