FAKE 150mW Nichia diodes being sold

themandalorian said:

Wait does this mean possibly these knockoff didoes could be showing up in lasers from yagoo, viasho, and CNI? Some high grade blu ray diodes would be pretty cool.

Sorry about your problem and I hope you get it resolved, must be cool to have a LPM

Click to expand...

The heat is different between AMD CPU and Intel CPU. Is it the higher heat one is not a true CPU? Different brand with their different spec. and price. we need to find out its model is true or not but not comper which one is batter in this case.

Michael

Thats confusing sources. I'm just saying I haven't seen any companies selling GOOD blu ray lasers, o-like has some pens but meh, can't burn with them. If companies did start producing 405nm diodes I'd be very optmistic and happy. 500mw of blu ray!

themandalorian said:

Thats confusing sources. I'm just saying I haven't seen any companies selling GOOD blu ray lasers, o-like has some pens but meh, can't burn with them. If companies did start producing 405nm diodes I'd be very optmistic and happy. 500mw of blu ray!

Click to expand...

Sorry for the misstake. The max. output is 600mw for 405nm but very shortage for 500mw and 600mw. We still trying to get it. Pls. send me a mail to michael@it-sourceshk.com. I will let you know when we get that offer.

Michael

it sources;

I commend you for making bare diodes available to the U.S. market ...
and posting on our LPF board.

There is a large demand for a true 150mw LD which peak @ 280mw.

Nichia makes quality laser diodes.

Obtain the Nichia LD's ...
and you will have many loyal customers here on this board.

I am under the belief that Nichia laser diodes are made in Japan.

Can you post photos of the original packaging ??

LarryDFW

Wait, are you saying Nichia diodes are made in Korea? :thinking:

Or are you saying your source for other diodes is in Korea?

ETA: This is speaking to "it sources", not you Larry. I am in agreement with you that Nichia is most definitely located in Japan. That doesn't mean diodes couldn't be coming from Korea, but it certainly complicates things as far as saying these are definitely Nichia diodes.

Hey Guys... I saw this over there and it applies to any member that
purchased the 150mW Nichia Diodes from L-S-P...

Due to the automatic Software lockouts you will need to remove all [ * ] in
names and addresses below...

RETURN POLICY for the 150mW Nichia Diodes ONLY.

Since this has been posted on the LPF, there will be people who will attempt to abuse my offer as well as the supplier will only refund me with the return of the diodes in question.


The following must be done before any exchanges will be made.

• The original diodes must be shipped back to me.
• Once I receive them, I will ship replacement SF-AW210 sled(s) per diode returned.
• Diodes will be checked to confirm they are the same as what where sold to you.
• You must include the original order number. or a copy of your receipt.

This will keep everyone honest and will meet the suppliers request as well.

Failure to meet any of the above and you will not receive anything! Please follow the instructions carefully.


If you have any questions, E-Mail me at sales@laser*surp*lusp*arts.com with 150mW Nichia Diodes in the SUBJECT line!



Ship the diodes to be exchanged to:

Steven K. Wa*gn*er
Wa*gn*er*Tech LLC
8640 State route 163
Belleville, IL. 62223

Again just passing info on to LPF members...
Don't shoot the messenger...


Jerry

Having dealt with "the public" in online sales for awhile, I completely agree with Steve's requirements.

Peace,
dave

pullbangdead said:

Wait, are you saying Nichia diodes are made in Korea? :thinking:

Or are you saying your source for other diodes is in Korea?

ETA: This is speaking to "it sources", not you Larry. I am in agreement with you that Nichia is most definitely located in Japan. That doesn't mean diodes couldn't be coming from Korea, but it certainly complicates things as far as saying these are definitely Nichia diodes.

Click to expand...

Yes. their have some mistake here. The Nichia is a Japen company but our goods is Nichia OEM goods for Samsung that the goods is come from Korea. Pls. send me a mail to michael@it-sourceshk.com if you want to see the original packing with their part no. We have 980nm 100mw-300mw laser pen, 593nm 0.6mw-2mw yellow laser, 405nm 500mw laser module will be coming soon (150mw diodes x 4)

Michael

Thanks It Sources for the information! We are really looking forward to testing the 500mw 405nm diodes. You will find many interested parties on the forum. Thanks again!

Hey it sources....

It would be helpful if you could posts prices for the Lasers/LDs you are
selling...

Jerry

Wow, a lot happened here, while i wasn't looking...

First of all, i said it many times, and i'll repeat it here, just to make sure everyone understands it: I DO NOT believe Steve to be of ANY fault here! He got ripped off much worse, than those of us, who bought a few diodes from him....


Also if you just bought ONE DIODE, you really don't have much to complain about. Even buying the three, i was fully aware, that there is a risk involved! I explained the reasons i was hopeful - the spec sheet and the previous good experience - but i knew i was taking a risk buying them. Especially buying three - but i wanted my tests to be thorough, which is impossible with only one.. But i should probably have bought one first, and only continue the testing if the initial results were encouraging...


Had i only bought one, i wouldn't be making a fuss about the cost. I have wasted (or invested into - depends on how you see it) INFINITELY more money than that on various research so far - it's the only way to learn, and the results benefit everyone... But i would of course still have posted the test results, even if it was just one. In my case, it was also the triple express shipping, that compounded the problem, but that was on my own request (i wanted results fast)...


What i'm trying to say is, if you buy a new untested diode, you should be aware, you are taking a risk - if you buy a new untested diode you should be buying it for testing! If you are unwilling to buy it for testing, you should probably wait for someone else to do it... And if you only bought one, you should be happy.



In any case, you should keep in mind, that in the end, Steve pulled the shortest straw here, no matter how many diodes anyone bought from him.... He bought an entire stock, and now he has problems because of it, while he was only trying to get us all something good. Don't make it harder on him, than it has to be!


Besides, his offer to replace them with SF-AW diodes is really commendable! I wanted to test those for a while now, and it would be amazing, if the money i put into this wouldn't go to waste! It's more than i was hoping for! As for his replacement requests, they are simply a necessity...

I should also mention, that thus far i have not requested any refunds or replacements from Steve - i was waiting to hear what the suppliers would do about it. I would not feel good demanding anything, if i didn't know Steve was being compensated by the suppliers...


But it would seem, that the actual diode suppliers are starting to work with him to solve this problem (it sources)... In fact, they seem very motivated to do something about it!

That is great news for everyone! I sure hope Steve gets fully compensated for any finantial losses these diodes are causing him. But i also hope he gets access to real high power diodes through this in the end! And if the suppliers are willing to cooperate, that is actually a good possibility!




it sources: From what you said, i take it you are the supplier, and it would seem that you got ripped off in this transaction as well...

But making an appearance here and taking responsibility and action is making a VERY good first impression, regardless of the first diodes being bad, and will ultimatelly be beneficial for you as well!


I mean, it is obvious, that you have a "foot in the door" with actual diode suppliers or even manufacturers... And i have high hopes, that in the end you will be able to get real high power diodes from them!

And once you do, Steve is going to be selling MANY for you, you can be sure of that! If you get actual 150mW Nichia diodes (or ANY manufacturer's 150mW 405nm diodes for that matter) at this price, you are going to sell hundreds here easily. And if you can eventually get us even higher powers, by all means please do! We are going to buy even more of those..


From one of your posts, it would seem you are offering two diodes from the next (higher power?) batch for testing, and are even willing to supply photos of the packaging with the specifications and all...

This is great news! I would absolutelly love to test them on my equipment! A simple PIV plot like the ones above will immediatelly show if they are over 100mW, and a lifetime-test on my cycler-circuit would show HOW MUCH over 100mW they are very quickly...

These tests would also help you make sure you don't get ripped off again!

I would post the test results, and if they are good, you won't have any problems selling the diodes... But from past experience, it would be best to approach any "new" diode with a smaller sample order first and do extensive tests on them, before buying more.

I would love to offer my services in the testing of any new diodes you can find. :angel:



I am actually very excited by this opportunity! If it ends in an actual high power diode supply, the bad diodes would have been worth it by themselves! (at least to me)


Anyway, i'll get back in touch with Steve, and await further news from you. Hopefully it will be good news!

In any case, the fact that you posted here, and are willing to cooperate to find a solution is a very good sign, and i am hopeful, that even if we have to go through several bad diodes with incorrect power ratings, we can eventually get to the real deal.


You should also make sure, that your diode supplier or manufacturer knows, that you won't be fooled again, and that you have a way of knowing if the ratings of a diode are correct! I'd gladly supply you with as many test results as it takes..

Hear Hear... Igor is our man!
Jay

jayrob said:

Nice comparison graph!

That's one to copy and save in my documents...

Thanks Igor!
Jay

Click to expand...

Thanks!

I made a higher resolution version for Steve to show to the supplier, but had to reduce it here for the forum to accept it. I also have just the plots without the text of course..

I'll send them to you in an email.




I also want to make sure it is clear what the problem is with these diodes...


They can not survive their rated pulsed power. Not even in pulsed mode, while they should survive it in CW, like all other 405nm diodes, for a sufficient number of hours to be a "reliable" laser pointer - at least in the terms of this forum.. We set all diodes to their pulsed ratings. Sometimes even MUCH higher...

But these diodes could not even survive their rated CW power for more than a small number of hours. And if nothing else, that clearly prooves that the ratings are false.

That's the problem.


Real 150mW Nichia's could easily be set to 300mW and live for a decent amount of time in a laser pointer. Just like the real 100mW Nichia went above and beyond 200mW in a straight line, they should go above and beyond 300mW in a straight line.

In fact, the real 150mW Nichia's could probably even survive 500mW after short FL/high NA glass lenses for the same amount of time as the 8x's.


But these diodes pop in a second at 220mW, just like PHRs.


Maybe i should put the live one on my cycler circuit, set to 150mW raw power (before the lens), just to proove the point? The test would be over in one day i'm afraid.



It's really about what you expect from them. I expected powers higher than those i reach with GGWs but with the same reliability. But i didn't get it. I knew as soon as i saw the kinks, that the ratings are false, but i continued the plot anyway and the first diode popped after only a second at just 220mW. GGWs don't die during plotting even if you go much higher than that. And they are of lower CW ratings than 150mW. Even the 100mW Nichia went further than that without a problem.


And that is the problem - the ratings are three times too high.
And this is not an oppinion, it's a fact. I wouldn't say it if i wasn't sure.


But if now both Steve and even the suppliers are working hard to fix the situation and find diodes actually rated for that power, i'm VERY happy!

I'd gladly lose the $200, if it resulted in being able to buy real 150mW diodes in the end!

jayrob said:

Hear Hear... Igor is our man!
Jay

Click to expand...

Haha, i just want to test new diodes... :angel:

You know how much i love "torturing" them... :yabbem:

I just thought I'd chime in:
Looking 100% solely from the information on the datasheets I've managed to dig up:
Nichia DO NOT make a 150mW 405nm diode (CW)
They DO however make a 120mW 405nm diode (CW)
LASER DIODEs : NICHIA Corporation

Now...
BEGIN FACTS:
(as per the Chinese 150mW datasheet)
The threshold current for the 150mW diode is stated to be 50mA typical.
The operating current for the 150mW diode is stated to be 150mA to produce 150mW
The typical slope efficiency is 1.2mW per mA

Therefore 100mA is supplied after the threshold, and assuming their typical slope efficiency of 1.2; means 1.2 x 100 = 120mW CW output power.
Now that's assuming ALL TYPICAL VALUES

Taking the lowest values (where appropriate), results in a minimum power output of: (150 - 70) * 0.8 = 64mW
Taking the highest values (where appropriate), results in a maximum power output of: (170-50) * 1.2 = 144mW

Those values are calculated from the data the Chinese supplier has written in the datasheet!

So a claim of 150mW CW isn't equal to the maximum mW value suggested by their own data.
END OF FACTS


OPINION:
I think these are genuine Nichia 120mW diodes, but the Chinese suppliers have fudged the datasheets promising false hope. Simply; telling people to push the diode further than it should, thus resulting in an early death.
As for pushing the diode to 280mW; that's ridiculous. Unless they mean PULSE. Still seems a bit high...

I reckon the supplier has marked up the diodes on the premise that no one will know!
END OF OPINION

When Steve was selling them in the LSP store, he wasn't to know!

A car dealership buys car 'X' from a manufacturer that is listed in the catalogue to do 300bhp. What the dealership doesn't know is that the car is really a 200bhp car with a 300bhp sticker on it. A customer buys the car and tests it out, finding it's only doing 200bhp. Who's at fault?
THE MANUFACTURER!

Dan

Well I tested one in June it LEDed at 300mA I though I was getting a 8x. Not sure if this qualify for refund.:undecided:

http://laserpointerforums.com/f38/150mw-cw-nichia-diode-lsp-41536.html

So I put the 150mW blu-ray Diode from LSP to the test.:angel:

Lens: 405nm G-1 glass
Heatsink: 1-1/4" x 3" alumimun
PS: 18V 3A bench
Meter: Knimrod DIY Thermopile calibrated

Here is the results:evil:

mA mW Volt
------------
40 18 4.2
50 33 4.4
60 46 4.5
70 62 4.7
80 77 4.9
90 94 5.0
100 108 5.1
110 125 5.2
120 140 5.3
130 154 5.4
140 155 5.5
150 167 5.5
160 180 5.5
170 195 5.7
180 205 5.7
190 214 5.7
200 225 5.7
210 236 5.8
220 249 5.9
230 258 5.9
240 270 5.9
250 283 5.9
260 292 5.9
270 302 6.0
280 314 6.0
290 323 6.0
300 LEDed:banghead:

I was planning to push it to 300mA.:cryyy: