New Laser Build Oclaro 700mW 638nm

[Alien Laser]

This is a new build Oclaro 700mW 638nm

 

[Isaac Clarke]

i'm seeing red...

 

[AniWon]

:drool: soooo pretttyyyy. Beam looks kind of wide on one of those pictures? Is that an expander?

 

[Isaac Clarke]

nope it's just the diode have a very bad divergence... all multi mode red have bad divergence for some reason... worse than blues and green..

 

[Alien Laser]

The beam is wide regular 600nm Lens

 

[AniWon]

Ohhh okay, well it looks great!

 

[Isaac Clarke]

lolz there's no way you manages to push a 700mw rated diode to 2watts...

 

[Alien Laser]

i fixed it not 2W (2A) it turned yellowish and never turn on again

 

[RedCowboy]

It's a good looking little red monster, really bright.
Too bad about the diode, but at least they are cheap, my collection of dead nubm's are expensive magnet ornaments.

It's interesting the backing is ferrous, maybe the gold color coating helps move heat? But they act like steel, not the cans but the backing is ferrous, I would have thought it would be copper alloy or brass.

 

[Pman]

Nice I always find it interesting that when we take pics showing the laser and beem a lot of the time the beem doesn't look straight. Optical illusion most of the time.
I've got plenty of magnets too Red Hate to figure out the cost of all my dead diodes.

 

[RedCowboy]

Oh I hear ya, I have easily over 100 dead counting 532's.
But 15 and 40 dollar dead diodes hurt a lot less than 140 dollar dead diodes.

I just thought it was interesting that the backing is not some hard copper alloy or brass/aluminum for heat transfer.

 

[GSS]

It's a good looking little red monster, really bright.
Too bad about the diode, but at least they are cheap, my collection of dead nubm's are expensive magnet ornaments.

It's interesting the backing is ferrous, maybe the gold color coating helps move heat? But they act like steel, not the cans but the backing is ferrous, I would have thought it would be copper alloy or brass.

It reminds me of a sticky roach trap Are all diodes regardless of wavelength magnetic that you have seen?

 

[paul1598419]

I imagine that one that you pushed to 2A was quite brief before death.

 

[Benm]

I'm mostly curious why it turned (more) yellow during that. When heating a laser it normally red-shifts, so it should just have gone a dimmer and deeper shade of red.

I presume at the point where it turned yellow it wasn't actually lasing anymore and already led'ed.

As for these things being ferromagntic: That might actually not be caused by iron, but by nickel. Brass is sometimes nickel plated to help avoid corrosion, but that would make little sense if the brass is visible on the surface. One option could be that it's actually doubly plated - nickel onto brass and a thin layer of gold on top of that.

 

[Dutch67]

This is a new build Oclaro 700mW 638nm
Dtr's like always

-
This is my old video of my old build Oclaro 700mW 638nm
we will remember you hehe i pushed the diode over 2A the diode turned yellow almost op:

I'm planning on building a red Oclaro 700mw and I had a few questions.

Does it get hot fast?

And what lens did you use?

 

[Alien Laser]

I'm planning on building a red Oclaro 700mw and I had a few questions.

Does it get hot fast?

And what lens did you use?

No its not getting hot very fast and i used a blue lens for the red lasers
i only used it to make the video i only keep it on my display i thing it shod be
40 seconds on and 1 minute off i will test one i will just keep it on until something happen since have 4 of this diodes