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Old 07-19-2010, 01:26 AM #1
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Default Strange effect with 445nm diode and driver.

So, I finally managed to pull off a 445nm in a MAXSINK. WOW!
I am impressed, however my driver went nuts trying to drive it at 400mA. I used a 6v PSU rated for 2.5Aamps. The diode pulled so much out of the driver the pot started getting too hot. At full power on the driver I got 4.6v @ 410mA. The output can burn/scortch dark paper at 15ft after about 4 seconds!
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Strange effect with 445nm diode and driver.-p1020860.jpg  


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Old 07-19-2010, 01:45 AM #2
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Default Re: Strange effect with 445nm diode and driver.

'S purty blue, ain't it?

Peace,
dave
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Old 07-19-2010, 05:04 AM #3
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Default Re: Strange effect with 445nm diode and driver.

A little note for safey. This is an example of what can happen with an unfocussed beam.

I used a black binder as a temp beamstop.

Voltage to diode was 4.6v at 405-410mA here. Shows you even at this power why eye protection and ALL flammables need to be well away from the beam. Output Iam guessing is around 390-400mW? If you know correct me.
I was using a 405nm coated o-like glass lens.
Attached Files
File Type: mov P1020867.MOV (3.5 KB, 89 views)
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Old 07-19-2010, 10:59 AM #4
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Default Re: Strange effect with 445nm diode and driver.

Nice job, I wondered what that type of psu would do with this diode. It's a current monster. Probably run ok at twice that rating.
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Old 07-20-2010, 01:50 AM #5
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Default Re: Strange effect with 445nm diode and driver.

What is "that" rating? Do you mean run it at 2W? or run it at 800mA?
I'd heard that the A103s would gladly take 1100mA at 4.3-4.5vdc
__________________
650nm ~350mW DVD 20x diode RyanSoh3 Class IIIb
650nm ~350mW DVD 22x 3.5mm labby build 2010 Class IIIb
532nm 10mW-15mW DPSS Module IR filtered(S.Korea)RyanSoh3 Class IIIb
450nm CarbonFiber ElectricPlasma build 9mm +6W Class IV
445nm 3.49W pk ~3.15W av. Sinner Cypreus II +DTR 9mm 445nm Class IV
445nm RHD Saber Twins 2.7W ~2.35W pk Class IV
445nm A140 module x2 Maxsink Class IV
405nm Daguin Kryton Groove SO6J 700mW build. Class IV
405nm Olike 560mW-600mW pen sold Scopeguy20
Class IV
337.1nm TEA Nitrogen laser project 2011 Class IIIb
---------------------------------------------------
Die4Drivers 1.3v lab laser/projector driver

Laserbee 3.2W Deluxe LPM
ARGMeter 1.1v
Ophir 20C-A sensor

Peregrine 1.5.0 is working now on MacOSX Yay!!
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Old 07-20-2010, 08:32 AM #6
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Default Re: Strange effect with 445nm diode and driver.

No, I mean if your psu was rated for double it's capacity, 6V at 5A, as well as a higher powered pot. The current demand might have been met, and therefore keeping the forward voltage of the LD within specification as well. Still, we all enjoyed your experiment! kudos
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650nm - 260mw in MXDL host with brass heatsink
650nm - 325mw in stainless Raygun host. The dot is so bright it's
PINK/ORANGE!
Thanks Jay! Thanks Drew! Thanks Larry! Thanks Glenn! Thanks Dave!

Pink - 500mW (white w/red , ok not till later)
Please don't dazzle aircraft! You wouldn't hit someone in the face normally would you?
Home of the stainless RAYGUN !

Last edited by millirad; 07-20-2010 at 08:35 AM.
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