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Old 04-09-2013, 11:01 PM   #1
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Default Osram PL520 50mW 520nm Laser Diode

Osram PL520 50mW 520nm Laser Diode









Ok so I got my PL520's in stock today and got some quick testing done on these tonight. Now I was really surprised how bright they really are and am very pleased with these diodes. They are the begining of a new era here for sure. I want to start off by saying these run extremely stable from what I have seen so far and they appear to be pretty damn tough as I have doubled the datasheet recommended current and have not seen any degradation on the diode. They can double the datasheet output or more but it is yet to be determined if it is good to run them that hard yet.


Anyway here we go. They seem to have a lasing threshold of 70mA and there you will see about 15mW. This test was done with a G-2 lens.









Next on to 100mA and it gets about 28mW.








Next to 150mA and it jumped to 55mW. 27mW gain for 50mA.








Next to 200mA max recommended current via the datasheet and we are seeing just under 80mW. 30mW gain for 50mA. This really may be the sweet spot.








Now to 250mA and a jump to 96mW. Only a 16mW gain for 50mA.







Next to 300mA and 107mW. So we are falling off the efficiency curve at this point. 11mW gain for 50mA.








Next to 350mA and 116mW. 9mW gain for 50mA.







And just for good measure on to 400mA and 118mW. 2mW gain for 50mA.










So there we have it. With an acrylic lens you are probably looking at a 15-20mW decrease so looks pretty solid 80mW with a G-2 and probably 50mW with an Acrylic. There are still wavelength and controlled temperature experiments that can be done but I think that about sums up the output capabilities.


Now on to divergence and different lens tests.

Last edited by DTR; 04-08-2014 at 03:07 AM.
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Old 04-09-2013, 11:05 PM   #2
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Default Re: Osram PL520 50mW 520nm Laser Diode

The PL520 seems to have an optimum on 50mW. Thanks for the test.
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Old 04-10-2013, 12:01 AM   #3
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Default Re: Osram PL520 50mW 520nm Laser Diode

How easily is the color to differentiate from 532nm? Is it a clearly different wavelength or is it very similar?

EDIT: So it looks like for 200mA, the voltage draw will be about 7V? So either run with 2 Li-Ion batteries and a linear driver(?) or 1 and a boost? I don't know a lot about that stuff so please correct me if I am way off there!

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Old 04-10-2013, 12:41 AM   #5
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Default Re: Osram PL520 50mW 520nm Laser Diode

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How easily is the color to differentiate from 532nm? Is it a clearly different wavelength or is it very similar?
It's very similar but it's quite different at the same time. It's easy to tell side-by-side, otherwise it's a bit harder.
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Old 04-10-2013, 08:32 AM   #6
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Default Re: Osram PL520 50mW 520nm Laser Diode

Great work Jordan.
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Old 04-10-2013, 08:51 AM   #7
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Default Re: Osram PL520 50mW 520nm Laser Diode

Anyone that wants to put one together with a host, shoot me a pm!
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Old 04-10-2013, 08:51 AM   #8
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Default Re: Osram PL520 50mW 520nm Laser Diode

Am I seeing correctly that the dot on the LPM isn't round? Nice Job!
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Old 04-13-2013, 03:16 PM   #9
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Default Re: Osram PL520 50mW 520nm Laser Diode

Do you think we'll see the prices of these going down in the near future?
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Old 04-13-2013, 08:29 PM   #10
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Default Re: Osram PL520 50mW 520nm Laser Diode

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Do you think we'll see the prices of these going down in the near future?
I would say so they've already went down a good amount
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Old 04-13-2013, 08:51 PM   #11
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Default Re: Osram PL520 50mW 520nm Laser Diode

Excellant work Jordan-- but a suggestion..

" Next to 200mA max recommended current via the datasheet and I would say for this diode that is about right. Pretty much dead on 50mW."

DEAD?? ooh no!!!,, -- WAIT WHAT??
you mean 'spot'... on right? .. When read fast thats what I thought--dead as in DOA- zombied-LEDed- kilt- No Mo pretty colors-- Kaput!

My Q is when will they be 'more affordable??-
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Old 04-14-2013, 03:44 PM   #12
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Default Re: Osram PL520 50mW 520nm Laser Diode

OP updated with new results after getting my Ophir back up and running.


Quote:
Originally Posted by svdr View Post
Am I seeing correctly that the dot on the LPM isn't round? Nice Job!
You do not want to focus to a spot on a LPM that is how they get damaged. It is a bit past focuesed so the light is more spread on the sensor.

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Old 04-14-2013, 03:59 PM   #13
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Default Re: Osram PL520 50mW 520nm Laser Diode

So 250mA for nearly 100mW? These are looking better and better by the day!
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Old 04-14-2013, 05:02 PM   #15
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Default Re: Osram PL520 50mW 520nm Laser Diode

That looks distinctly 532nm , compared to your other photo's , assuming its the same camera?
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Old 04-15-2013, 10:53 PM   #16
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Default Re: Osram PL520 50mW 520nm Laser Diode

I can't tell the difference between my 520 and 532.. Honestly the only thing that looks different is the dot. 532 has a BIT of a lime tinge to it, even the beams side by side look the same. Other than that, they look exactly the same... I could post a pic and take bets on which is which, and it'd be 50/50...can't say I'm not disappointed :/
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Old 04-15-2013, 11:00 PM   #17
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Default Re: Osram PL520 50mW 520nm Laser Diode

Quote:
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I can't tell the difference between my 520 and 532.. Honestly the only thing that looks different is the dot. 532 has a BIT of a lime tinge to it, even the beams side by side look the same. Other than that, they look exactly the same... I could post a pic and take bets on which is which, and it'd be 50/50...can't say I'm not disappointed :/
Might be that you just got a higher wavelength diode?

I really want to see this for myself, there's been so many different descriptions of the difference in hue.
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Old 04-15-2013, 11:03 PM   #18
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Default Re: Osram PL520 50mW 520nm Laser Diode

That's my theory. This has to be 525+. There is honestly no difference but a slight one with the dot. Nothing like DTR's pics. I almost want to get another hoping it's lower... Or get a <515 wherever they're hiding.

Just stuck it in the freezer so we'll give that ship a sail.
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Old 04-17-2013, 01:25 AM   #19
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Default Re: Osram PL520 50mW 520nm Laser Diode

much more impressive test with this lpm. Was something wrong with the other lpm causing it to read low?
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Old 04-17-2013, 01:45 AM   #20
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Default Re: Osram PL520 50mW 520nm Laser Diode

Nice results. I just threw a 520 into a C6 from JayRob. 520 is a lot better than 532 IMHO. Now they just need to release some 500mW SM diodes.
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Old 04-17-2013, 03:12 AM   #21
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Default Re: Osram PL520 50mW 520nm Laser Diode

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Now they just need to release some 500mW SM diodes.
that's amusing

hmm, though you do get close to that with the S06J's
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Old 04-17-2013, 03:50 AM   #22
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Default Re: Osram PL520 50mW 520nm Laser Diode

500mW of SM 520 would be ***y and a great addition to a projector. Seeing 514 or 520 next to 532 makes 532 look yellowish. I never though 532 looked yellowish until I compared it to 514 and 520.
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Old 04-17-2013, 04:40 AM   #23
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Default Re: Osram PL520 50mW 520nm Laser Diode

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Originally Posted by Dr_Evil View Post
500mW of SM 520 would be ***y and a great addition to a projector. Seeing 514 or 520 next to 532 makes 532 look yellowish. I never though 532 looked yellowish until I compared it to 514 and 520.
that's crazy
At selem 2 years back when comparing 543nm and 532nm the 543nm made the 532 look blueish this makes me want to see a 520nm 532nm and 543nm.
I guess we need another beamshot room this year at selem
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Quote:
22:37 <jeffreythe00 ... All colors are nice though so it is really hard to choose
22:38 <lazerman121> yea i want an ajustable wavelenth pointer
22:38 <jeffreythe00> that would be EPIC! too bad they dont exist yet
22:39 <lazerman121> U scroll a nob and it goes through the wavelenths ONe By one
22:40 <jeffreythe00> that would be AWESOME! though i only see one downfall...
22:40 <lazerman121> what
22:41 <jeffreythe00> you would have to change your pants after every use :O!
>>Click Me<< Go on I dare you
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Old 04-17-2013, 11:13 AM   #24
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Default Re: Osram PL520 50mW 520nm Laser Diode

It's similar when I compare 473 to 488, 488 automatically looks green. Eyes are so strange
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Old 04-18-2013, 02:30 AM   #25
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Default Re: Osram PL520 50mW 520nm Laser Diode

520nm may work better than dpss with 650nm in the beam combiners to make yellows and oranges. Someone should try it soon. Also would like to see how it combines with the Osram 450 50mw, it should mimic 488nm.
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