New high power 405nm diode?

IgorT · Dec 12, 2008

Well, turns out Susie just doesn't know anything about diodes. Definitelly not enough to fake a datasheet, not even badly. She also doesn't know what a "harvested diode" means. So she isn't selling PHRs as 120mW diodes..

She just posted the data she found on the suppliers web page. I asked why it's incorrect, and she asked for correct data, and posted it on her web page now. She doesn't understand the data, so she couldn't have noticed inconsistencies, if she tried.

The supplier (a laser factory, which uses diodes, but doesn't usually sell them), doesn't allow posting the Nichia datasheet. Even if it may sound like an excuse to some of you, it is not rare that datasheets are kept secret. I have some datasheets with "CONFIDENTIAL" stamped all over them in big red letters..

I don't think Susie is lying..

TheMonk · Dec 12, 2008

Version 3 of the ????Sheet ;D

New_Reverie · Dec 12, 2008

IgorT said:
Well, turns out Susie just doesn't know anything about diodes. Definitelly not enough to fake a datasheet, not even badly. She also doesn't know what a "harvested diode" means. So she isn't selling PHRs as 120mW diodes..

She just posted the data she found on the suppliers web page. I asked why it's incorrect, and she asked for correct data, and posted it on her web page now. She doesn't understand the data, so she couldn't have noticed inconsistencies, if she tried.

The supplier (a laser factory, which uses diodes, but doesn't usually sell them), doesn't allow posting the Nichia datasheet. Even if it may sound like an excuse to some of you, it is not rare that datasheets are kept secret. I have some datasheets with "CONFIDENTIAL" stamped all over them in big red letters..

I don't think Susie is lying..

So are we talking 6x here? Better? It seems like we can get 6x for $55 now with minimum orders of 50. Anything in those secret sheets that may make this worth the extra $20?

IgorT · Dec 12, 2008

I think this diode should be similar to the 6x. At least in it's power ratings. But as we all know by now, 405nm diodes are a little crazy. It could be better than 6x, or it could be a little weaker.

I am interested in it, because it would finally be one diode with a datasheet. That would help me establish a baseline, to compare other diodes to. It would help me figure out what 4x's could be rated for and what 6x's could be rated for. At least approximatelly, of course.

I think this would be a good alternative to 6x's if 6x's were not available. But now i am mostly interested in it, for what i can learn from it..

Kage · Dec 12, 2008

So, is she selling just 1, or would she be able to get us (meaning you, Igor) just one to test, or does it require a GB?

Kage · Dec 12, 2008

TheMonk said:
Version 3 of the ????Sheet ;D

This one is starting to look more real!

the one at the bottom, that is..

IgorT · Dec 12, 2008

Actually, the first one looked the most realistic to me. The 5V reverse voltage rating is something i can't quite believe.. I'm pretty sure no diode can survive that.

I might get a sample, i don't know yet.

amihov · Dec 12, 2008

What is the the diffrence between this diod and 803 ? Isn't 75 $ per peice to much for someting that is not proven to work and get 0 support from the manufacture?

daguin · Dec 12, 2008

amihov said:
What is the the diffrence between this diod and 803 ? Isn't 75 $ per peice to much for someting that is not proven to work and get 0 support from the manufacture?

In order to learn these things we have to take these kinds of chances. I am assuming you are to new to remember some of us paying $285 for a 6X drive just to try the diode or that we used to happily pay $50 for an XBOX 360 HD DVD add-on player to "get the chance" to get an 803 diode.

It is we that do most of the "proving" of the diodes we use. The only way that we "know" that the "12X" diode isn't one is that AMK paid for a couple and sent them to IgorT to test and I bought a batch of the eBbay sleds to burn up.

Peace,
dave

IgorT · Dec 12, 2008

amihov said:
What is the the diffrence between this diod and 803 ? Isn't 75 $ per peice to much for someting that is not proven to work and get 0 support from the manufacture?

What is the difference?

The PHR is a ~50mW reader diode of unknown specs and ratings. This diode is a 100-120mW diode from Nichia with KNOWN specs!

This diode should be as good as the 6x diode. But that is just a guess. Why? Cos we don't have ANY specs for the 6x diode, except for some guesses and some datasheet raping.

This diode, with a known power rating, would help me compare it to other diodes we use (PHR, 4x, 6x), and figure out what they are. This diode would help me establish a valid 100mW 405nm diode baseline, for comparison with other diodes. That way i could then figure out if the 105mW Sharp datasheet might belong to the 6x diode or the 4x diode or none of them.

It would give me VERY useful info from which i would learn A LOT! It's research. I do a lot of that.

Kage · Dec 12, 2008

IgorT said:
Actually, the first one looked the most realistic to me. The 5V reverse voltage rating is something i can't quite believe.. I'm pretty sure no diode can survive that.

I might get a sample, i don't know yet.

Interesting. I think we could verify that V(r) spec one way or the other without damaging the diode, if we are careful about limiting the current to a very small amount like microamps, using a curve tracer. I still wonder if they are guessing about the actual datasheet just as much as we are...

amihov · Dec 12, 2008

Thank you for the info . This will be a good diod then

IgorT · Dec 13, 2008

Kage said:
[quote author=IgorT link=1228867955/60#70 date=1229115807]Actually, the first one looked the most realistic to me. The 5V reverse voltage rating is something i can't quite believe.. I'm pretty sure no diode can survive that.

I might get a sample, i don't know yet.

Interesting. I think we could verify that V(r) spec one way or the other without damaging the diode, if we are careful about limiting the current to a very small amount like microamps, using a curve tracer. I still wonder if they are guessing about the actual datasheet just as much as we are...

[/quote]

Kage, the maximum Vr rating is DEFINITELLY NOT something i want to risk testing on a 120mW Nichia diode! ;D

Kage · Dec 13, 2008

IgorT said:
Kage, the maximum Vr rating is DEFINITELLY NOT something i want to risk testing on a 120mW Nichia diode! ;D

Okay, granted, a new one would be risky, but say you should accidentally COD one during testing, it might still be electrically viable for this test...

IgorT · Dec 14, 2008

In my experience, when a 405nm diode commits COD, it stops being a diode, and becomes a resistor with a broken laser on it's back..

Instead of 5.4V it suddenly only neds 3.1V for the same current, and puts out a pathetic amount of incoherent light..

But i don't know how to test the max reverse voltage survivability, without killing a bunch of GOOD diodes. Afterall, that's how the manufacturer does it...

Besides, it really doesn't matter to me..

What matters is, how much light will come out and for how long....

suiraM · Dec 18, 2008

It might be the diode used by Olympus in their fluorescent imaging scanners, which could certainly be a Nichia. If someone has a contact in Olympus, it might be worth checking out. Otherwise, there's nothing to do but to wait for a test.

New high power 405nm diode?

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