Holy @#$%... $100 488nm diode!!

Re: Holy @#$%... $120 488nm diode!!

diachi said:

This image H2Oxide posted actually is a reasonable representation of the colour - at least on my monitor.

Will depend on the dichro - may be able to angle tune for best efficiency too. Might end up with another custom dichro GB if these are popular...

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I agree that's pretty close, but anybody seriously wondering needs to see one in person.

Now the question is how stable the diodes are around 488nm. I don't think I'd be mad if they fluctuated up around 500nm or down in the 470s, but 488nm is definitely a narrow color on the spectrum.

Re: Holy @#$%... $120 488nm diode!!

Rivem said:

I agree that's pretty close, but anybody seriously wondering needs to see one in person.

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Agreed!

Curious as to W/L variation too - some of the diodes we have just now vary quite a bit either by current/temperature/batch. A few nm on either side of 488nm would be OK IMO.

Re: Holy @#$%... $120 488nm diode!!

I am also curious about the price for the 375nm diodes.

Laser Diodes | Semicom Visual

I wonder what the intended application of these is? DNA sequencing uses 488nm but I thought they needed other wavelength and better beam quality and spectra.


I was just browsing their diode product page, and saw this: http://www.semicomvisual.com/product/nubm05/. Here they said 30mW for what is clearly a 30W block. Strange.

Re: Holy @#$%... $120 488nm diode!!

I have a pretty decent color shot here:

http://laserpointerforums.com/f40/spectra-physics-scientific-488nm-slm-decsl-laser-96506.html

Sadly I was just going to post the pic but I can't copy image location on my phone. Since I'm at work.

Re: Holy @#$%... $120 488nm diode!!

I'm also interested in the 375nm!

Re: Holy @#$%... $120 488nm diode!!

Damn! It's been awhile since I've had the urge to build another laser but I'd love to have a handheld 488 to go with my argons.

Re: Holy @#$%... $120 488nm diode!!

Atomicrox said:

I'm also interested in the 375nm!

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I was looking at 70mW 375nm diodes on Thorlabs just earlier - they were priced at $4300.

Re: Holy @#$%... $120 488nm diode!!

diachi said:

I was looking at 70mW 375nm diodes on Thorlabs just earlier - they were priced at $4300.

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Sounds reasonable.

Re: Holy @#$%... $120 488nm diode!!

The prices of these diodes are driven by supply and demand.

405nm diodes are in very high commercial demand for blu-Ray burners. 488nm diodes are in incredibly slim demand by universities with grants or big hospitals that don't care whether the diode is $4 or $4000.

It comes down to us not being important.

They don't market to us even though a lot of people will claim, "but we are a giant forum, this is a huge market." That's...sadly not the case.

They don't make diodes for the common man. If they did, and we happened to be a large market for them, can you think of the kind of credibility they'd lose? Big name diode seller, once known for supplying equipment to the top medical research facilities in the country, now selling laser diodes cheaply to hobbyists.

We just have to wait for the tech to be used in a consumer product. Then it's go time, until then, there really isn't much of an "unreasonable" price under $10,000.

Re: Holy @#$%... $120 488nm diode!!

Now I can't stop checking here for updates...oh man I want one so badly. Dear laser gods, please let this go through!! Hopefully they have a lot of variation in center wavelength because they're new...I'd love to do a batch test on a spectrometer and then cherry pick the extremes.

I want to put one in a minisabre...

diachi said:

I was looking at 70mW 375nm diodes on Thorlabs just earlier - they were priced at $4300.

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There were a few coherent cube 375nm units that went for $500-$600 a piece that showed up on eBay a while ago. They were all just under 20mW IIRC. If they were just a bit lower in price I would have bought one and gutted it for a sweet UV pointer. I couldn't bring myself to dropping the cash though...more will show up before long anyway...

Re: Holy @#$%... $120 488nm diode!!

styropyro said:

There were a few coherent cube 375nm units that went for $500-$600 a piece that showed up on eBay a while ago. They were all just under 20mW IIRC. If they were just a bit lower in price I would have bought one and gutted it for a sweet UV pointer. I couldn't bring myself to dropping the cash though...more will show up before long anyway...

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I actually mentioned such deals in the other thread. Cheap (relatively...) UV lasers come up on eBay in various forms - a while back there was a bunch of small 266nm Q-Switched DPSS THG (Third Harmonic Generation for those that don't know, also known as frequency doubled 532nm) units that were going for fairly cheap. One actually came up fairly recently, would have grabbed it in a flash if I had cash. Both of my 325nm HeCds were less than £100.

I never did find a whole lot of use for 325nm though. Still, wouldn't mind another HeCd!

Re: GUIDE: Which company should I buy from?

Jordan, did you get the invoice yet?

styropyro said:

Dear laser gods, please let this go through!!

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Is this the laser god you're praying to?


:crackup:

Re: Holy @#$%... $120 488nm diode!!

styropyro said:

Now I can't stop checking here for updates...oh man I want one so badly. Dear laser gods, please let this go through!! Hopefully they have a lot of variation in center wavelength because they're new...I'd love to do a batch test on a spectrometer and then cherry pick the extremes.

I want to put one in a minisabre...



There were a few coherent cube 375nm units that went for $500-$600 a piece that showed up on eBay a while ago. They were all just under 20mW IIRC. If they were just a bit lower in price I would have bought one and gutted it for a sweet UV pointer. I couldn't bring myself to dropping the cash though...more will show up before long anyway...

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DIBS now on highest WL diode you are willing to part with. I said it. Single, double, triple, and quadruple dog dibs.

I'm buying my own anyway, but I like what you're saying here.

As for a UV diode...honestly, really, they aren't that exciting. It's basically a 405nm diode, but you only get the illumination it gives to dyed fabrics and GITD material. However the spot is near-invisible like IR.

It would be cool to have, but I can't justify spending $500-600 on a laser that I can't see, CO2 aside of course because reasons.

However. Using the 337nm output from a low-torr, vacuum sealed, N2 laser pumping a set of five servo-mounted front-surface mirrors going to five separate dye cells with different dyes, allowing me to select which portion of light from uv to blue, blue to green, green to orange, and orange to red, and red to IR? Then sending that output through a prism and then a spatial filter? In order to get broadband tunability from UV to IR? Yeah. That's something I'd be willing to play ball with.

*eye-balls schematic scribbled on a napkin at SELEM*

Re: GUIDE: Which company should I buy from?

bloompyle said:

DIBS now on highest WL diode you are willing to part with. I said it. Single, double, triple, and quadruple dog dibs.

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I do believe that I discovered this diode... I think that overrides your quadruple-dog-dibs. Highest wavelength is mine! :eg:

Re: Holy @#$%... $120 488nm diode!!

I suppose....but you're going against the creed of dog daring/dibsing. Though I suppose you've earned it.

Re: Holy @#$%... $120 488nm diode!!

Here's a couple pictures of the 488 in my signature. I actually need to see about getting it repaired or finding another one.




The 488 with my 589.