Not quite yellow but it seems equally complex to produce 550nm, the article describes it as a solid state fiber pumped tunable laser, pumping at different powers between 1080nm-1100 creating a range from 540nm-550nm. Fiber doped with ytterbium. Its a bit beyond my grasp of understanding but i get the idea of the whole process for the most part, however can anyone clue me in on what exactly a necsel is? Is this the same process with a trademarked label or is it a different way of producing 550nm? I saw this 2w 550nm laser that you can order with a development kit and ive been obsessed with desire ever since. (Unfortunately will not be buying anytime soon unless i win the lottery) Green Developer's Kit - Necsel
Also i remember reading in a really old photonics book about experiments with optical storage in the 90s with yellow wavelength diodes but the research didnt go anywhere, and for the longest time i searched unsuccessfully for more info about yellow diodes. Then i came across this II-VI semiconductor green laser diode achieves lower current threshold
even though reading about semiconductor crystal growth processes is like putting a bunch of big words that i have little understanding of beyond vague recognition of sci-jargon techspeak into my brain and having them bounce around my head like rubber balls in a box leaving me confused and feeling slightly dimwitted....im still super excited for 560nm diodes to hit the scene, (though again its unlikely ill own one anytime soon unless i hit that lottery jackpot)
I've seen research into making a RGB diodes for a while now. But i'm glad to see an actual product at last. I saw a couple of chinese sellers claiming to have rgb diodes but they were nothing of the sort. This is great news.