Dpss yag laser

[mixedgas]

Anything in particular you guys would like to see it unleashed on before I head back to school? I want to let it drill a hole through a nice chunk of aluminum just to see how deep I can go and keep a clean edge, but I am open to suggestions [/QUOTE]

GLASS please...

Steve

[Laser57]

Raising the dead here, been a very long time since this thread has been active.... but, might anyone know what the CW output of one ND:YAG is and what can be had with two, as originally configured?

[VDX]

... my two old ones had 120W and 150W (salvaged and sold) ... actually have a "medical" with 60W ... but not "CW" but "averaged"

[Laser57]

You could get 120+ watts out of one single ND:YAG from the Avia Thor when pumped at 300 watts? Impressive, especially 150W. Just wanted to confirm this is possible from a three diode ring Avia Thor ND:YAG, thanks.

[VDX]

... the two old ones (120W/150W) were not DPSS, but flas-lamp pumped ... much lower efficiency, as with diodes -- I'll estimate something like 3-5%, instead of around 35% with DPSS.

I've stored one of the resonator chambers and got some water-cooled 405nm-LED's with 9W and 100W output, to pump ruby-rods -- I have two rods, but "old style", not doped for DPSS but flash-lamps ...

[Laser57]

Ah, 120+ with flash lamp. Best I've come to find for the ND:YAG output of the diode pump driven 300W Avia Thor head is about 40 watts for a single head, but when searching online for typical output percentage of the pumped power for 1064 nm output, estimates are much higher. Appears I have a bad resource or didn't ask the question properly on x.ai - I know, ai gives bad answers frequently, depends upon their source and ai "thinking" process.

[VDX]

... for typical power-efficiency with diode pumped lasers, here some numbers:

Sometimes around 2005 I had a "disk"-laser with 20Watts averaged, which was pumped with a 60Watt IR-laserdiode-module.

Modern fiberlasers too needs around 3x the later "averaged" output power as combined IR-pump-laserdiodes -- output efficency specified as 35% ... so not much efficiency development in 20 years

[Laser57]

The donut diode rings are each 100 watts, I believe this is likely DC watts into the diodes, three 100 watt rings producing 300 watts at 50% efficiency would be 150 watts of IR pump power, so it stands to reason the output of the ND:YAG is 1/3, or 50 watts, perhaps 60. Is my reasoning valid?

[VDX]

... sounds reasonable

On the other side - when only shortly activated (and with massive cooling), diodes can be "overpowered" with up to 50% for some millisconds and up to several 100% for microseconds ... then they'll need some seconds for cooling down.

So for "pulsing" applications this could be much more

[Laser57]

Pulsed high current DC to the diodes, I don't have a power supply capable of doing so but for now, want to use them at a constant current with a AOM or something to produce short bursts, high peak power out of the ND:YAG to produce more efficient SHG conversion to green.

I was wrong about the IR power of these donuts, 100 watts output is what they are rated to produce, so I'm hopeful to get at least 75W CW out of a three donut head. Anyone believe this expectation to be high?