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ArcticMyst Security by Avery

Build quote? ~1W 635nm

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Im looking for a build quote for a completed 900-1100mw 635nm, preferably in

an 18650 host, that allows a 120+ second duty cycle. I'm not going to want it

until January, however, but I would really appreciate a quote!


Thanks a ton!
-Cameron
 





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That's rather far away.... I could do one, will look at the parts and the prices and will pm you with a quote
 
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That sounds really expensive. A 500mw 638nm would be easy enough but a 1W not so easy I think. I don't think there is a 1W regular diode in 635nm or 638nm, I know there is a 1W C-mount diode in 635nm. You could do a dual diode build with two of the Mitsubishi 500mw 638nm's. If there is another way hopefully someone will post it here.

Alan
 

Tmack

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The mitsu 500 638 is capable of being driven to 1w. Many members have this setup.
 

Blord

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An output of 1 Watt is possibe with the 500mW 638nm Mitsubishi diode. You will need an excellent heatsink for the laserdiode because at this overdrive the power will drop fast and I doubt it will sustain for 120+ seconds.
 
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What's the maximum power that would still be really visible and bright at night outside, but that could sustain, and not strain the diode too much? I plan to have it built into sinners MS-Envy, so heat-sinking shouldn't be an issue.
 
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500mW



What's the maximum power that would still be really visible and bright at night outside, but that could sustain, and not strain the diode too much? I plan to have it built into sinners MS-Envy, so heat-sinking shouldn't be an issue.
 

Tmack

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My 680 has been running well for a while now and it in a 501b . It doesn't get too warm terribly fast. But at this power the beam nice and visible.
 
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This is interesting, does anyone know what current the driver should be set at to reach 1W? When using a G2 lens of course. I did a search and found a video of one running at 1W:


Here is one styropyro built thats only 450mw and it looks like it would be incredibly bright outside at night:


Alan
 

Blord

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Like Flaminpyro said. If you want to play safe then set the output on 500mW, the nominal value.

I have build a 1.4A 638nm laser for borgqueenx and it did 1191mW peak on the LPM.
LPM%20borgqueenx%20638nm%20501B.jpg
 
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Thanks Blord I didn't know we could overdrive them that far, I suppose its a risk though. OK to be safe then 800ma or 850ma. I was just reading the data sheet for this diode, it can be found here: http://www.mitsubishielectric.com/s.../laserdevice/ldindis/638nm/ml501p73_p1245.pdf
and it can be CW or Pulse, when pulsed at 50hz and 33% pulse duty its rated at 1W, someone should make a driver for this. It has a chart showing it reaching 1W at between about 1A to 1.4A depending on the temperature, but for CW it says max current 800ma. DTR drives them at 850ma.

CameronJP I am sure you will have no problem getting what your looking for. There are enough people here that are capable. Good luck and its nice to see someone else from Washington here.

Alan
 
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Ive built a couple at 1 W too, so its possible. The laser can be run for 1 min with no issues and the power stays above 1 W - this has to be done anyway due to the slow response time of my LB USB 2.5 W LPM...:(

I will have one for sale, when I finally get round to it...;)

Heres a link to the graph. :beer:
 
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@ Pi R Squared- remember that styropyro uses fog in all the vids I've seen by him to enhance the beams brightness. without fog 450mW of 635-638nm is not really too bright. I mean too bright compared to many other common high powered lasers

I am sure that it would be easily visible at night though

@Op

Have you considered getting a single mode 638nm? If you dont need to burn and just a nice visible-at-night beam is all you're after, I'd spring for an opnext buid instead. sometimes I consider offering to trade my multi-mode 638 for an opnext build. the divergence of the mitsubishi 638nm 500mW diodes can only be described as terrible. if you are more into burning and a plane of red-orange light as opposed to a thin line and minimal burning, get the mitsubishi 500mW or 1000mW build. otherwise get someone to make you a single mode opnext diode laser

@Tmack. your eyes must pick up red light better than mine if <300mW of 680nm has a nice visible beam to you. my 660nm 280mW beam is visible, but not bright unless in fog. even at night it's possible not to see it if you are at a 90 degree angle especially
 
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Tmack was talking about his 680mw 638.

Could one of those opnext be built into a standard 12mm module host? Also, are they more expensive? Minus the cost of the host, I don't REALLY want to spend more than about $100. Less obviously preffered
 
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the mitsubishi diode is 5.6mm and the opnext is 3.8mm. if the diode is pressed into a module that fits your host, heat sink, and driver setup, it should work. a builder would know more particulars and what driver pairs well with each diode. Under $100 may be tough regardless of diode choice, though the opnext is less expensive. here are the diode costs from DTR's shop:

https://sites.google.com/site/dtrlpf/home/diodes/mitsubishi-635nm-500mw-diodes

https://sites.google.com/site/dtrlpf/home/diodes/mitsubishi-635nm-110mw-single-mode-diodes

I think the most power you can hope for on the single mode opnext build is maybe around 240-250mW, and if I'm correct thats driven pretty hard. I might be wrong about the exact figures, dont quote me
 
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The thing with those Opnexts is that they're only spec'ed at 120mW, which you means you might be able to push to 200mW or so for longer duty cycles. That's still about half what you'll get from those low-end Mitsubishi 638nm laser diodes (300mW) with moderate overdriving. I'm not sure if the tighter beam will overcome the lack of raw power. The Mitsubshis do widen out quite a bit, but in some ways that makes them seem even brighter. I have a ~600mW or so 638nm in a Kryton Groove and it is very visible at night, and extremely visible when there's a lot of dust in the air. I'd probably just go with the 500mW variant first.

CC2ggoH.jpg
 




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