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Old 06-19-2010, 11:57 AM #33
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Default Re: List of 445nm diodes

Updated first post

EDIT: Missed your post, brtaman, I'll add you soon



Last edited by Grix; 06-20-2010 at 12:26 AM.
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Old 06-19-2010, 12:09 PM #34
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Default Re: List of 445nm diodes

Since there is no flexdrive yet, I 'll post here when i complete my build.

Peter
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Old 06-19-2010, 05:29 PM #35
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Default Re: List of 445nm diodes

Here is a photo of my 445nm host:

Operating parameters:
Current= 600ma
Power = 518mw
Lens = 445 Hi-Power w/Steel Aperture
Heatsink = 2.5 oz. Aluminum w/ Fins
Battery = 2800mah #18650
Driver = Direct Drive
Operating minutes = 90
Run Time > 1 Hour between charging

Source= AJ-X130

LarryDFW

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Old 06-19-2010, 05:36 PM #36
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Default Re: List of 445nm diodes

Quote:
Originally Posted by lazerov View Post
Isn't the Microboost a boost driver? If so, the current you are measuring at the tailcap and the current flowing through the diode will be completely different values.

(somebody correct me if I'm wrong)
Correct. When using a boost driver, you cannot measure the diode current by measuring on the battery side. The current drawn from the battery and the current delivered to the diode are NOT the same. The driver pulls more current to create the needed voltage boost. Plus, it draws more as the battery is drained.

His numbers are impressive, but not reliable

Peace,
dave
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Old 06-19-2010, 05:45 PM #37
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Default Re: List of 445nm diodes

Laserov is right I think(if he is using a boost). That's just the current draw from the battery, and not the current going to the diode.
Edit: Daguin beat me to it!
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Old 06-19-2010, 06:43 PM #38
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Default Re: List of 445nm diodes

Updated it again. I assumed all diodes were alive.
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Old 06-19-2010, 08:56 PM #39
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Default Re: List of 445nm diodes

Quote:
Originally Posted by daguin View Post
Correct. When using a boost driver, you cannot measure the diode current by measuring on the battery side. The current drawn from the battery and the current delivered to the diode are NOT the same. The driver pulls more current to create the needed voltage boost. Plus, it draws more as the battery is drained.

His numbers are impressive, but not reliable

Peace,
dave
In that case, how should I measure it? I'll redo them.

Thanks!!
Jose
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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):

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Crystal Laser:
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Old 06-19-2010, 08:58 PM #40
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Default Re: List of 445nm diodes

Nice host Larry!!
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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):

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Old 06-19-2010, 08:59 PM #41
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Default Re: List of 445nm diodes

You'd have you desolder the diode, and test it with a dummy load.
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Old 06-19-2010, 09:02 PM #42
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Default Re: List of 445nm diodes

Quote:
Originally Posted by jmgallego View Post
In that case, how should I measure it? I'll redo them.

Thanks!!
Jose

The way to set a boost driver is to create a test load out of four 1N4001 diodes and a 1-ohm resistor all in series. You connect the test load to the output of the boost driver and measure the output by reading the voltage across the 1 ohm resistor. It will read 1mV for each mA of current the driver is supplying to the load. Once the current is set where you want it, you connect the laser diode (after shorting the output pads of the driver together to drain any capacitor charges) and measure optical output. The boost driver you're using only provides up to 1A of current to the diode I believe, so with these diodes you can probably just turn the current all the way up.
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Old 06-19-2010, 09:28 PM #43
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Default Re: List of 445nm diodes

Ah... the dummy load thingie, I complete forgot about it. I was doing like I was measuring it before and with flashlights! Agh! How "dummy" of me I just felt it was too easy, too good. I should buy me an LPM, that way I would had a hint that there was something off. Still is really powerful!!

I'll work on tonight, just need to them diodes, got the resistor.

Thanks guys,
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.
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Old 06-19-2010, 10:32 PM #44
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Default Re: List of 445nm diodes

https://spreadsheets.google.com/ccc?...h5cFE&hl=en_GB

Thought this might help a little? Had some time so I organised all the current data into power/current order and also drew a little scatter graph Gives us a rough idea of what current gets what power.

Current is on the bottom axis, power on the side.
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Old 06-19-2010, 11:08 PM #45
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Default Re: List of 445nm diodes

Nice that is really beginning to look like we have 2 distinct types of diodes.
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Old 06-19-2010, 11:27 PM #46
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Default Re: List of 445nm diodes

I built a 445nm with a maxed out microboost at 1200mA and it outputs >1050mW (my laserbee wont measure greater than 1050mW)

not very accurate numbers but it says something about these diodes. About an hour worth of burn time on it.


P.S. My first build you have listed uses a microboost, 405-g-1, and an igorT host/heatsink v3 and this build uses a 405-g-1 and a jayrob 18650 kit with a microboost.
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Old 06-20-2010, 01:45 AM #47
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Default Re: List of 445nm diodes

Quote:
Originally Posted by heruursciences View Post
Nice that is really beginning to look like we have 2 distinct types of diodes.

If we could just find the origin of each one posted. Are any of those plotted 140?
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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; 06-20-2010 at 07:50 PM.
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Old 06-20-2010, 12:23 PM #48
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Default Re: List of 445nm diodes

Quote:
Originally Posted by jmgallego View Post
I should buy me an LPM, that way I would had a hint that there was something off. Still is really powerful!!
I recommend checking this out for a simple LPM. I don't know how well this would work with such a high power diode, but it's worth a shot, should only cost about $17 to build.

Simple Laser Power Meter Using IR Thermometer
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