Old 02-16-2012, 08:21 PM #1
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Default Osram PL450 450nm 80mW power chart

I am posting my data on the Osram PL450 450nm 80mW TO38S

My diode is mounted in the aluminium module and heat sinked with a big CPU cooler.
Lens is standard acrylic lens and 405nm/445nm G2 lens.

Test equipment:
Bluefan Basic LPM.
DC powersupply YH-305D






I hope this information helps us all learn more about this diode.
Attached Thumbnails
Osram PL450 450nm 80mW power chart-450nm-setup.jpg   Osram PL450 450nm 80mW power chart-osram.png  


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Old 02-16-2012, 08:44 PM #2
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Default Re: Osram PL450 450nm power chart

Are you direct-driving that diode right off the power supply?

Is it OK to do this for every diode in every case?

Thanks.

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Old 02-16-2012, 08:50 PM #3
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Default Re: Osram PL450 450nm power chart

Yes, the diode is direct driving by the DC power-supply. You have to dial the current knob to zero and short the terminals before hooking up the diode. Works for every diodes. It is a very handy tool for the laser hobbyist.
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Old 02-16-2012, 08:55 PM #4
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Default Re: Osram PL450 450nm power chart

So the PSU essentially acts as the driver to regulate constant current?

Glenn
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Old 02-16-2012, 09:04 PM #5
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Default Re: Osram PL450 450nm power chart

With the bench PSU you can omit the driver. It acts like a variable driver and power supply in one.


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Old 02-16-2012, 09:10 PM #6
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Default Re: Osram PL450 450nm power chart

Glad to be of help on the 1,000 posts!

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Old 02-17-2012, 02:56 PM #7
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Default Re: Osram PL450 450nm power chart

Quote:
Originally Posted by Blord View Post
I am posting my data on the Osram PL450 450nm 80mW TO38S

My diode is mounted in the aluminium module and heat sinked with a big CPU cooler.
Lens is standard Acrylic and 405/445 G2

Test equipment:
Bluefan Basic LPM.
DC powersupply YH-305D

I hope this information helps us all learn more about this diode.

This is great info to have for anyone building a blue laser using this doide, thanks!
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Old 02-17-2012, 03:14 PM #8
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Default Re: Osram PL450 450nm power chart

Thanks for doing this. Do you have a duty cycle to report? It also helps to know your measurement methods.

Do you let the diode cool down between every data point? Or were all the point taken in < 5mins time?

Was the any active cooling on the heatsink like a fan?

Have you considered making a higher resolution plot to work out some of those noticeable "wiggles"?

Just giving you some ideas. You got a good setup, and proper measurement tools, and I think you've got the ability to go even further!

Nice work!

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Old 02-17-2012, 03:29 PM #9
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Default Re: Osram PL450 450nm power chart

I didn't took 5min between the readout. It is more like 10sec. I dailed the current to the next step and waited 10sec. Maybe i got sloppy in the last measurement, there is some up and down at some points.
The aluminium heatsink barely heatup during the test. It could be easily cooled passively.
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Old 02-17-2012, 04:05 PM #10
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Default Re: Osram PL450 450nm power chart

Quote:
Originally Posted by Blord View Post
I am posting my data on the Osram PL450 450nm 80mW TO38S

My diode is mounted in the aluminium module and heat sinked with a big CPU cooler.
Lens is standard Acrylic and 405/445 G2

Test equipment:
Bluefan Basic LPM.
DC powersupply YH-305D






I hope this information helps us all learn more about this diode.

Wow I thought you needed a driver because of voltage spikes, so the psu regulates current/voltage? Where did you buy it? I've used them before in highschool engineering class. I need to get me one

btw I have the same LPM
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Old 02-17-2012, 08:14 PM #11
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Default Re: Osram PL450 450nm power chart

I updated the chart with more G2 measurements and with 30sec readout after adjusting the current.

Maybe I should murder the diode to know its limit ?
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Old 02-17-2012, 08:35 PM #12
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Default Re: Osram PL450 450nm power chart

Quote:
Originally Posted by Blord View Post
I updated the chart with more G2 measurements and with 30sec readout after adjusting the current.

Maybe I should murder the diode to know its limit ?
Did you manually create the graph?
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Old 02-17-2012, 09:04 PM #13
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Default Re: Osram PL450 450nm power chart

I put the numbers in MS Excel and the software makes a nice graph for me.
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Old 02-17-2012, 09:28 PM #14
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Default Re: Osram PL450 450nm power chart

Thanks for the testing.

I need to get one of these for a keychain build. If you could squeeze 250mW-300mW out of it that would be sweet. I see you topped it @ 1A. What does the data sheet recommend on these?

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Old 02-17-2012, 09:41 PM #15
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Default Re: Osram PL450 450nm power chart

Noway it can be run at 1A. I stopped testing it at 200mA and that is already 50% overdriven.



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Old 02-17-2012, 10:41 PM #16
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Wink Re: Osram PL450 450nm power chart

Valuable resource. I sold the diode I had, may need to get another one...
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