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See attached. Most of the YB host crystals cannot make it out to 575 nm.. YAB's efficiency is so poor at that wavelength, that it is unlikely to be used. Most likely SVAP. Chart deleted, I do not feel like angering a copyright holder. Steve

Working on it. See my reply in the other thread. Steve

I have the later papers in front of me, so I have a bit of advantage. SVAP is the only published material so far that has the full 46 nm tunable range we see on these devices, with the 565/575 yellow. and the occasional flash of short wavelength green during warmup on mine is at the other end...

if your willing to kiss goodbye 565 to 575 from YB:SVAP (yep, I had it right long ago) and just go for the greens, then these YB based crystals are close to commercial use. However they need 2x to 4x the pump power vs a ND:vanadate green system at 532... However if your willing to pay 100$ a...

see page 23:.. https://apps.dtic.mil/dtic/tr/fulltext/u2/a389442.pdf Steve

If you think this is easy: https://apps.dtic.mil/dtic/tr/fulltext/u2/a389442.pdf Note the date of those notes... Steve

Looks like some one might have known a bit in advance. From a paper I'm trying to obtain, I quote: "However the Yb:xxx laser displays a slow degradation in power over the …" I cant get the whole paper yet. Steve

They knew: Quoting a paper I'm trying to access "However the Yb:xx laser displays a slow degradation in power over the …" I'm still trying to get the paper, I can only see part of the quote... Looks like you got that small group of lasers due to a known, published, crystal degradation. Steve

Because I can? Seriously, you are barking up the wrong tree with changing wavelengths and trying to go gas. You want to reinvent the studied to death, physically huge, dead end, high power gas dynamic laser? Go ahead and waste your money. Because any funding agency worth it's salt has access...

The guy who knows Gas, over at the other forum, just pulled his elaborate post on how to find laser wavelengths. I am he, and after reading this I have determined that you just don't need to know what your asking. Mainly for your own safety and that of others in airspace. Gasses other then CO2...

Many of the recent Chinese CO2 PMs are copies of Peter Laakman's design. Laakman is a Synrad Founder. https://patentimages.storage.googleapis.com/3c/2c/53/d9af122a4e1572/US5409314.pdf Note Novantia, Synrad's parent company has the patent assignment ACTIVE..., which means you can build one...

Please see attached from Univ. of Missouri and Laser-Professionals.com Nice chart. Should be a sticky here.. Very few know what OD means in non-scientist terms. I'd getting tired of explaining it year after year. Please credit and sticky the attached pDf.

In the US that crystal run would cost 35,000-50,000$. So even converted to Riminbi, That is a NOT a cheap growth shot. I've got a dying one, my friend has a dying one and one better engineered one that is almost stable. Mine is developing a color center in the crystal. I'll move the crystal...

1121 nm has 1/20th the gain of 1064. 1121 in ND:YAG s really one line out of three 112x nanometer lines very close together, so you need a etalon intracavity to select the most powerful line on a big 561. unless you like frequency hopping. So a 20 mW 561 yellow needs the same pump and frame...

The 60X sled was designed for the Xerox 9700 family of printers. 2 pages per second at 300 dpi In 1977... Steve

When it takes three months to a full year some times to run a Czochralski batch, no one will be in a hurry to grow these, as the only use is medical and low end medical analysis, and lifetimes have NOT been promising with the very high energy densities the Chinese are using. Other then for eye...

I also picked up a linear shit ton of REO developmental mirrors from an Estate Sale on Ebay. About twenty boxes of various multi-line hene developmental mirrors. FUN. I picked what looked to be winners from the package codes and made up a box for DZ. I fear many of the have radius that are too...

My current record is 18 lines, IR, Red, Orange, Yellow, Raman Red, Raman Orange, and 4 wave mixing lines from one VERY HEALTHY three mirror REO particle analyzer cavity. Getting precious access to a FFT based spectrum analyzer that covered 550 to 1.8 um in one swoop was the trick. I...

Also if you can get it to run, you can then pop your radius and distance data for both cavity mirrors, into PSST!'s cavity calculator and see how well you fill the bore, your probable divergence if your not clipping the bore walls, and if your cavity design is possible or impossible, stable...

All you need is a mercury or low pressure sodium lamp filtered to emit one line and a optical flat.... Helium is also often used but the yellow line is weak.. I'm at work and I don't have the math with me, but it is a simple jump from the interference fringe count to the radius if you know...