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Directly-injected orange-yellow diode lasers soon?

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Yes, you heard that correctly folks!

This article in Laser Focus World magazine's July 2018 issue is what us laserists dream about!!!

An orange-yellow (599 to 605nm) directly-injected laser diode will allow for laser radiation in this part of the spectrum to be generated directly, without the need for expen$ive nonlinear crystals or cryogenic equipment! :drool:
 
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I'm happy to hear you say that, great andhow long they will mass produce them?
Thank you for share information
 

steve001

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Yes, you heard that correctly folks!

This article in Laser Focus World magazine's July 2018 issue is what us laserists dream about!!!

An orange-yellow (599 to 605nm) directly-injected laser diode will allow for laser radiation in this part of the spectrum to be generated directly, without the need for expen$ive nonlinear crystals or cryogenic equipment! :drool:
I beat you by a few days. https://laserpointerforums.com/f40/...e-emitting-599-605-nm-103293.html#post1543780

In addition these two threads if you haven't been keeping record. Both are chartreuse yellow and yellow lasers using a pumped diode and a seemingly single self frequency doubling crystal.

https://laserpointerforums.com/f40/565nm-dpss-labby-102862.html

https://laserpointerforums.com/f40/574nm-36-mw-yellow-laser-102893.html
 
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RedCowboy

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Direct yellows have been in the works and there are working examples, in time the efficiency will improve, how fast that happens depends on how much is put into research and development which of course id dictated by the market/need.

Low-threshold yellow laser diodes
 

paul1598419

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I was going to say that we just had a thread about this same article. Getting the yellows (this article was about an orange diode) at room temperature has been one of the problems to overcome. I'm sure we will see direct diode yellows in numbers that will make it possible for us to get them. The real question is when?
 

RedCowboy

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Maybe as projector greens get more efficient and move further away from blue we may see advancements in yellow producing substrates as well, one industry use may lead into another.

I can see the difference between 520 and 525 in my 1w diodes, maybe a 1w 535nm next ? 1w of 535nm should look brighter than 1w of 520nm
 
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paul1598419

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I would like nothing better than to see PJ yellow diodes. That would be when we will be able to get high power yellows at a reasonable price. It is still anyone's guess when that might be.
 

Benm

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There are benefits to having direct yellow for projectors and such, so i'd give it some chance at least.

Having yellow as a color can increase the efficiency of a display or projector quite a bit - for now it's mostly Sharp developing this for screens, but others could very well tag along.

It doesn't add that much to the gamut of a display system since our eyes aren't that impressed by monochromatic yellow as they are by monochromatic cyan, but you could achieve more brightness at lower cost if you had yellow in the mix.
 
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OMG Will my dream of owning an amber laser diode actually come true?

:eek: :eek: :eek:

Probably not.

They will most likely be extremely expensive if produced and I don't have that type of income :(

But I am hopeful that they will be made more available for us all to enjoy!
 

RedCowboy

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In time they will be available and cheap, just stay healthy and live a long time. LOL

But seriously, I expect a lot will happen in the next 5 years, the strong economy is in our favor.
 

Benm

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Well, economic growth will not make laser diodes of random wavelengths suddenly being produced, unless there is an actual market (not enthusiasts, but mass consumer) for them.

Yellow would probably very useful in projection though. You can get there by mixing red and green, but you need a heck of a lot more red power than green to make something look yellow.

So yeah, if the technology works i can see RGBY commercial projectors being produced to get more brightness from a given amount of power... and we'll be there to harvest the diodes :D
 

steve001

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Well, economic growth will not make laser diodes of random wavelengths suddenly being produced, unless there is an actual market (not enthusiasts, but mass consumer) for them.

Yellow would probably very useful in projection though. You can get there by mixing red and green, but you need a heck of a lot more red power than green to make something look yellow.

So yeah, if the technology works i can see RGBY commercial projectors being produced to get more brightness from a given amount of power... and we'll be there to harvest the diodes :D
I believe the overarching impetus driving direct yellow lasers isn't for projectors, instead it's the varied medical applications
 

paul1598419

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That is the article that is in the OP of this thread. It was also in a thread two days earlier than this one started by steve001.
 

RedCowboy

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Yep, I looked for info about that event " 2018 Advanced Research Workshop Future Trends in Microelectronics " but not finding specifics about this research.

I read that yellow laser light is good for stopping blood leakage during eye surgeries as well as cosmetic procedures and others, that's an important use that should move this research forward, once the medium is grown successfully and refined to be reasonably efficient I would expect to see it in the peripheral marketplace, it will likely be expensive at first like the 488nm were.

---edit---
[(AlxGa1–x)0.5In0.5P]
 
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