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Old 06-20-2010, 10:50 PM #33
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Thanks Gryphon, I am working on updating the first post, hopefully it will make sense as to what I have learned about the 445nm LD


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Building Laser Pointers Using the 445nm Laser Diodes
Diode Lasers:
405nm: 15 and 35mW built, PHR 405nm, 100mW, Dagin's Dorcy built ~200mW
445nm: Built ~3W and Jayrob Built - 445nm <1W
532nm: 70mW and ~200mW
635/650nm: 200mW, and several builds
Gas Lasers:
337nm: Nitrogen (N2) laser, 3mW, 175uJ/pulse, peak @ 30kW and a 6mW, 260uJ/pulse, peak @ 75kW
632nm: Melles Griot HeNe, 0.5, 1. 0 5 0 and 15. 0mW
Dye Laser(s):

380-~1000nm: Different laser dyes, different wavelenghts, different laser powers.

Crystal Laser:
Holmium YAG (Ho:YAG) laser, 2.1 μm, 53W

Assorted laser accessories, including LPM, optics, and a holography table.
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Old 06-21-2010, 01:46 AM #34
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Just a quick note on the lens I am using.

I tried Jayrob's 405nm lens but it did not look to good for me. Others have found this too, including Jay http://laserpointerforums.com/f64/fs...tml#post720940.

For now I am using a regular Aixiz glass lens which gives a nice "roundish" point. Here is focus and zoomed in from about 24ft away from the wall:


And here, expanded or out of focus from the same distance.
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Building Laser Pointers Using the 445nm Laser Diodes
Diode Lasers:
405nm: 15 and 35mW built, PHR 405nm, 100mW, Dagin's Dorcy built ~200mW
445nm: Built ~3W and Jayrob Built - 445nm <1W
532nm: 70mW and ~200mW
635/650nm: 200mW, and several builds
Gas Lasers:
337nm: Nitrogen (N2) laser, 3mW, 175uJ/pulse, peak @ 30kW and a 6mW, 260uJ/pulse, peak @ 75kW
632nm: Melles Griot HeNe, 0.5, 1. 0 5 0 and 15. 0mW
Dye Laser(s):

380-~1000nm: Different laser dyes, different wavelenghts, different laser powers.

Crystal Laser:
Holmium YAG (Ho:YAG) laser, 2.1 μm, 53W

Assorted laser accessories, including LPM, optics, and a holography table.
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Old 06-21-2010, 01:57 AM #35
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

I updated the original post...
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Building Laser Pointers Using the 445nm Laser Diodes
Diode Lasers:
405nm: 15 and 35mW built, PHR 405nm, 100mW, Dagin's Dorcy built ~200mW
445nm: Built ~3W and Jayrob Built - 445nm <1W
532nm: 70mW and ~200mW
635/650nm: 200mW, and several builds
Gas Lasers:
337nm: Nitrogen (N2) laser, 3mW, 175uJ/pulse, peak @ 30kW and a 6mW, 260uJ/pulse, peak @ 75kW
632nm: Melles Griot HeNe, 0.5, 1. 0 5 0 and 15. 0mW
Dye Laser(s):

380-~1000nm: Different laser dyes, different wavelenghts, different laser powers.

Crystal Laser:
Holmium YAG (Ho:YAG) laser, 2.1 μm, 53W

Assorted laser accessories, including LPM, optics, and a holography table.
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Old 06-21-2010, 12:27 PM #36
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

You shouldn't run your laser with the cap on, because it could damage the diode. Although that's quite rare.
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Old 06-23-2010, 10:42 AM #37
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Fantastic guide jmg, really helpful cheers

As buildabluraylaser said, the only issue with it is that you run it with the cap on, I've done it a few times with my PHR and not had an issue but a few members have had an issue with this killing the diode.

Thanks again for the detailed write up, a little rep coming your way
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Old 06-23-2010, 01:32 PM #38
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

@ jmgallego

Great pics!! Could you add some smoke to the room and once again compare the 200mw 532nm with the 445nm?
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Old 06-24-2010, 12:09 AM #39
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

This makes me think of the 445nm laser pointers on the various advertised websites. I do have to admit the high price tag keeps this out of the hands of irresponsible people.
Regardless they still have hand held lasers with more power than would be considered safe and would surely be far outside of the classification of "toy"
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Old 07-01-2010, 11:05 AM #40
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Thumbs up Re: Building Laser Pointers Using the 445nm Laser Diodes

@ jmgallego excellent thread on how to press the diode in, I bought almost the same kit from Jayrob. I had him set the current to 800ma used a copper extended heatshink and drill out the pill. Following your guide seating the A140 diode was a snap, Thanks for that, I hope this thread becomes a sticky....my first 445nm build has went very well. +1rep
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Old 07-03-2010, 05:57 AM #41
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Hi Xtrm2Rick, BuildAbluraylaser and Asherz,

You guys are right, I should have use to demo the difference in intensity of the two lasers. Although it difuses the light and makes the silicone cap fluoresce, it is not a good idea to turn on the laser with the cap. I made a note on that post.

What I do recommend, as a precaution, to put a cap over the laser in case of one accidentally turns the laser on. And, as I mention, I do not care if the laser diode gets killed, I am more concern about accidentally turn it on and hurting someone.

Besides the caps will also protect the lens from getting dusty

Jose
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Building Laser Pointers Using the 445nm Laser Diodes
Diode Lasers:
405nm: 15 and 35mW built, PHR 405nm, 100mW, Dagin's Dorcy built ~200mW
445nm: Built ~3W and Jayrob Built - 445nm <1W
532nm: 70mW and ~200mW
635/650nm: 200mW, and several builds
Gas Lasers:
337nm: Nitrogen (N2) laser, 3mW, 175uJ/pulse, peak @ 30kW and a 6mW, 260uJ/pulse, peak @ 75kW
632nm: Melles Griot HeNe, 0.5, 1. 0 5 0 and 15. 0mW
Dye Laser(s):

380-~1000nm: Different laser dyes, different wavelenghts, different laser powers.

Crystal Laser:
Holmium YAG (Ho:YAG) laser, 2.1 μm, 53W

Assorted laser accessories, including LPM, optics, and a holography table.

Last edited by jmgallego; 07-03-2010 at 06:37 AM.
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Old 07-03-2010, 06:31 AM #42
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Quote:
Originally Posted by jbtm View Post
So driving the diode with a FlexDrive at 600mA will be no issue? I wasnt sure if there was a difference between the micro boost and the Flexdrive in performance as to how much power the thing can output, to run the laser safely.

Also, when using the dummy load of 1N4001 diodes and 1 ohm resistor, Is it best to connect it and adjust the power according to red lasers or bluray lasers?
So far, I have not had any problems running the 445nm laser diode at currents from 600 to approximately 1200mA.

Yes, just to make sure that you DO NOT overload the laser diodes, it is best to use a dummy load, measure the current before using the laser diode.

I am in the process of building a dummy load but instead of using the 1N4001 diodes, I will be using 1N5001’s. The reason is the 1N4001 diodes have a maximum rating of 1A while the 1N5001 diodes have a maximum of 3A. Also, I may need to use a resistor with a higher rating so it can stand the current and the heat.

Also, I placed an order for a laser power meter from Kenom, this way I will be able to know what current I am using and how much power I am getting out.

I post my notes once I have these two items.

Jose
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Building Laser Pointers Using the 445nm Laser Diodes
Diode Lasers:
405nm: 15 and 35mW built, PHR 405nm, 100mW, Dagin's Dorcy built ~200mW
445nm: Built ~3W and Jayrob Built - 445nm <1W
532nm: 70mW and ~200mW
635/650nm: 200mW, and several builds
Gas Lasers:
337nm: Nitrogen (N2) laser, 3mW, 175uJ/pulse, peak @ 30kW and a 6mW, 260uJ/pulse, peak @ 75kW
632nm: Melles Griot HeNe, 0.5, 1. 0 5 0 and 15. 0mW
Dye Laser(s):

380-~1000nm: Different laser dyes, different wavelenghts, different laser powers.

Crystal Laser:
Holmium YAG (Ho:YAG) laser, 2.1 μm, 53W

Assorted laser accessories, including LPM, optics, and a holography table.

Last edited by jmgallego; 07-21-2010 at 03:16 AM.
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Old 07-03-2010, 06:33 AM #43
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Quote:
Originally Posted by Asherz View Post
Fantastic guide jmg, really helpful cheers

As buildabluraylaser said, the only issue with it is that you run it with the cap on, I've done it a few times with my PHR and not had an issue but a few members have had an issue with this killing the diode.

Thanks again for the detailed write up, a little rep coming your way

Thanks Asherz, I really appreciate your support. I did make some additional comments to the original post.
Jose
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Building Laser Pointers Using the 445nm Laser Diodes
Diode Lasers:
405nm: 15 and 35mW built, PHR 405nm, 100mW, Dagin's Dorcy built ~200mW
445nm: Built ~3W and Jayrob Built - 445nm <1W
532nm: 70mW and ~200mW
635/650nm: 200mW, and several builds
Gas Lasers:
337nm: Nitrogen (N2) laser, 3mW, 175uJ/pulse, peak @ 30kW and a 6mW, 260uJ/pulse, peak @ 75kW
632nm: Melles Griot HeNe, 0.5, 1. 0 5 0 and 15. 0mW
Dye Laser(s):

380-~1000nm: Different laser dyes, different wavelenghts, different laser powers.

Crystal Laser:
Holmium YAG (Ho:YAG) laser, 2.1 μm, 53W

Assorted laser accessories, including LPM, optics, and a holography table.

Last edited by jmgallego; 07-21-2010 at 03:17 AM.
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Old 07-03-2010, 06:39 AM #44
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Quote:
Originally Posted by blrock View Post
@ jmgallego

Great pics!! Could you add some smoke to the room and once again compare the 200mw 532nm with the 445nm?
Sure, I will use the potassium nitrate and sugar technique. I will try to post them tomorrow evening. Keep an eye for the post then.
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Building Laser Pointers Using the 445nm Laser Diodes
Diode Lasers:
405nm: 15 and 35mW built, PHR 405nm, 100mW, Dagin's Dorcy built ~200mW
445nm: Built ~3W and Jayrob Built - 445nm <1W
532nm: 70mW and ~200mW
635/650nm: 200mW, and several builds
Gas Lasers:
337nm: Nitrogen (N2) laser, 3mW, 175uJ/pulse, peak @ 30kW and a 6mW, 260uJ/pulse, peak @ 75kW
632nm: Melles Griot HeNe, 0.5, 1. 0 5 0 and 15. 0mW
Dye Laser(s):

380-~1000nm: Different laser dyes, different wavelenghts, different laser powers.

Crystal Laser:
Holmium YAG (Ho:YAG) laser, 2.1 μm, 53W

Assorted laser accessories, including LPM, optics, and a holography table.
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Old 07-03-2010, 06:41 AM #45
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Quote:
Originally Posted by electron View Post
@ jmgallego excellent thread on how to press the diode in, I bought almost the same kit from Jayrob. I had him set the current to 800ma used a copper extended heatshink and drill out the pill. Following your guide seating the A140 diode was a snap, Thanks for that, I hope this thread becomes a sticky....my first 445nm build has went very well. +1rep

Glad to hear that it help you Thanks for the rep!

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Old 07-13-2010, 04:43 PM #46
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

+ rep...

I just say your pictures and tutorial...

I would like to add that there are a lot of options for my 18650 build kit.

Copper heatsink upgrade is very popular...

And one of the other most popular (and recommended) options is to have the pill drilled out, so that I can mount the driver inside the pill. That way, I can leave the heatsink a little longer...



This option gives extra room inside in case you need to position your module farther into the heatsink to adjust your lens (or EzFocus adapter) position...
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Old 07-13-2010, 10:36 PM #47
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

in this part you said


2. Although there are several ways to “press-fit” the diode into the Aixiz, I prefer the way someone described here a while back. Place the small hole of the back half of the Aixiz housing on top of the diode. Make sure the pins of the diode are inside and that is properly aligned as in this photo and press it slightly, enough to hold in place:



After this you will not ned the back half of the Aixiz housing, CORRECT?
right?
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Old 07-14-2010, 03:28 AM #48
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Default Re: Building Laser Pointers Using the 445nm Laser Diodes

Pretty much covered all the bases--good emphasis on safety-gotta +rep you on this sir!!!

one question tho--any advantage or disavantage to removing the pink plastic part from the diode pins, in your opinion?

Does it help to seat the diode in the AixiZ module properly?

for a job well done.
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