Frequency Doubling Silicon Nitride Laser Diodes for Deep UV Production

[kecked]

The idea is a direct optically pumped 445nm->222nm conversion.

Zinc Oxide doped with fluoride has been pumped with 1064nm and it shows there is a possible pumping path for what I want to do because they used it for making UVC leds. I am hoping to convert this LED action to laser action. It also looks like this material should be tunable by imposing an electric field on the band gap to stretch the transition. As a second topic, some materials act linearly and observe super position as a doubler hence SHG. I was talking about three different approaches. Sorry to confuse. If this involves anything more complex than a dpss green it is too complex. I'm looking for a cheap quick way to get into the far UVC range at significant power with significant conversion efficiency. Hence starting with cheap 445nm diodes seems a good way to pump in 5w and get out at least a few hundred mw. Now these new leds might make this a dead project. Plus the leds are probably safer to work with.

So yes optically pumped crystals that double 445nm without the requirement for feedback mirrors or heating/cooling.

[planters]

Zinc Oxide doped with fluoride has been pumped with 1064nm and it shows there is a possible pumping path for what I want to do because they used it for making UVC leds.

So, is this an up converter as with the lanthanides? If so, then this two photon process will require very, very high intensities, is inefficient and if an inversion could be achieved then a separate laser cavity will have to be built to allow this to lase. I suspect that this will be extremely difficult, but if you are up to it you could probably generate a paper.

Steve's crystals would work but you will need 532nm power.

So yes optically pumped crystals that double 445nm without the requirement for feedback mirrors or heating/cooling.

I doubt you will find this.

[kecked]

That is the reason for the look about to generate a paper.

I see these leds in the UVC but the prices are through the roof. Once they fall to production pricing some amazing stuff will happen. 50,000 hour Hg free Fluorescent lighting for one. Affordable gemidicals for the home. Like a bread box that kills mold spores. Florida cooling with mold killing. Clean the air in a car or plane. Self sterilizing showers... UV generation for water treatment to replace Chlorine/amine. AHH AND THE SELF STERILIZING TOLIET.

I'm think to look at aluminum/selenium/Zn2O I have high hopes for the selenium variety to push the far end of the UV. I am looking to avoid more toxic compounds and even selenium is low on my list of desired compounds. HOWEVER. IF the power goes up and the price down on the leds, there will be no point in making the laser variety. I see they already have 355nm laser diodes so it's coming sooner or later. I'd bet on an x-ray diode sooner or later... THZ is the next big thing I think going the other way. Well either way it will make for some interesting CVD.