Can LASORB protect a BLU-RAY laser diode?

[sugeek]

Ditto, bring them forth! If I have to wait much longer I might have to design my own

The last thread he was threatening to hire you....

-Adam

[Laserman532]

Dr Lava cant be bought. But if we keep getting strung along we should finance Dr. to incorporate it into his drivers. He can do it.

[Pangolin]

OK guys,

We just love to test and test and test, and make sure that the parts really do what we say they do, and can't be improved any further.

Most recently, a client sent three BLURAY. We blew all three (purposely). One of them was as you saw in the video. We wanted to see how static sensitive these things are when they are not protected. Another one was blown by us trying other "competitive" strategies (seems like they work about as well as nothing at all). And the last one we wanted to see the effects of a corona discharge.

This particular client needs a relatively large number of LASORB, so it basically forced us to take the time and develop a part that was optimized for BLURAY. I figured it would work pretty well, but even I was surprised to see that we can protect the BLURAY even against 16kV positive ESD while lasing.

Ok Bill, we all know this is slicker than snot on a doorknob, but when the heck can we get these?!?!?!

Hehe. Soon .

Actually the hold up has mainly been encapsulation. We need a special tool to encapsulate them. But we finally got encapsulation tools during this past week (but the company forgot to send the epoxy...). Probably be another week or so. I'll put a post up here once we are ready to go, and also once we have finalized the pricing.

That brings up a good question. How much stupidity do they protect against?

EXCELLENT QUESTION!!! One thing I am afraid of is that people will think this is a magical solution to protect against all kinds of grief. LASORB is like a bullet-proof vest for the laser. But a bullet-proof vest won't do you any good if you step on a land mine...

LASORB protects against reverse bias and from fast negative or positive pulses. If you have a crappy laser diode driver (and I am afraid to say we haven't seen many we like), and the crappiness is in the form of overshoots and fast pulses, then LASORB may solve this (and also protect the laser diode from ESD). But if the crappiness is thermal drift, such that over a long period of time the current increases beyond a maximum amount, then LASORB will not protect against this kind of crappiness.

One thing we really encourage everyone to do before using LASORB is to send us a driver. We will examine it, crank it up on our 10GHz scope, identify any problems and make suggestions for solutions, and then make sure the LASORB is optimized for the particular drive requirements.

We have a few clients that have LASORB who don't modulate the laser at all, and another client who modulates a laser at 350MHz. These are entirely different requirements. You get the best result with a LASORB optimized for a particular application.

Ditto, bring them forth! If I have to wait much longer I might have to design my own

Hehe. This is the kind of thing where, even if you knew exactly what was inside (in terms of the type of individual parts), it would be difficult to get it to work. It's like how Kentucky Fried Chicken is 11 herbs and spices. The question is, which herbs and spices, in what ratios, and where do you get the best herbs and spices! Just knowing the composition of the part is not enough....

Beyond that, you would need test equipment to verify that the part will perform as expected. (As amusing as 300 Evil's vaccuum cleaner is, it's not going to give you much quality data. ) We have pretty expensive and unusual test equipment at Pangolin, some of which was purchased specifically to test this part.

The part you see in the video is really the end-result of our development. The fundamental idea and type of components used have not changed since around last May when we invented this, and yet the performance is much better than last May. What has changed are the choice of manufacturers, specific parts and connection strategy. It has taken us nearly a year to perfect this, even knowing everything that we know and having test equipment to make sure it works.

So, bottom line if someone else started today, it would take them at least as long as us.

Anyway, if that's how you want to spend your time, sure, go for it! And I hope you've got a lot of money to spend on laser diodes to test!

Bill

[decix]

I'd need at least 2 of those LASORBs to protect my 642nm diodes. Had 3 of those diodes and already lost one... reason probably ESD. That really got me angry because those cuties ain't cheap.

[ljk]

Looks really great Bill, keep up the excellent work.

[dave]

Nice vid Bill,

As Adrian stated above, we are itching to get a few of these

[Blulaser]

Hi!!!

For buy lasorb exist internet store or link for request?
I need 4 lasorb for my blu ray diode and for red laser open can...

[keeperx]

Blulaser, not yet.. soon

Bill, its quite obvious that a lasorb designed to work with a FlexMod driver would be very useful to us, bluray and long open can diodes would be the norm.

Im sure there are plenty of DPSS greens with 2-5 watt 808 c-mounts that could be retrofitted.

Does the lasorb work for DPSS and could it be built retrofitted in.

Could the lasorb be on the driver itself?

is the principle similar to electrostatic absorption by NNCD?
http://www.necel.com/nesdis/image/D11663JJ6V0PF00.pdf

[Things]

Well DPSS lasers do just use laser diodes, so i'm sure it can be fitted to them if you want to, though unless your pulling the head apart or screwing around with the head connection cable, I don't see how it would be needed.

[Pangolin]

Hi guys,

Some folks over on LaserFreak will be putting together a kind of group buy scenario. That was mentioned here too by DZ I think... You guys should start a separate thread and figure out how many you want, and of what type.

In general, there are two formulations we have right now: one for red/IR use, and one for blue-ray.

Yes, these will work for higher power and IR diodes. In fact, we are making a custom little circuit board for Bridge to put into his lasers, with LASORB integrated onto the custom board.

We will probably offer these on eBay for a single-piece price of $8. We haven't fully settled in on the price breakdown in quantities right now, but it is likely to be in the $2 to $3 range for quantities.

is the principle similar to electrostatic absorption by NNCD?
http://www.necel.com/nesdis/image/D11663JJ6V0PF00.pdf

No, it's nothing like this. These are pretty classic techniques. Unfortunately, they won't work for a laser diode. We tested all of these classic and known techniques -- assuming that they would work. They don't... It surprised us. Since none of these classical things work, that's really why we had to develop something that did work. And actually, since none of the classical things worked, I was worried that we might not even be able to solve this problem. 50 Amps in 1 nanosecond is pretty tough...

Bill