05:30 <bofh_> 16:29 < SpeedEvil> Anything homecmos doesn't require red lasers

05:30 <bofh_> 16:30 < SpeedEvil> never-mind UV

05:30 <bofh_> a 1.4W 445nm laser diode cost me $45 on ebay, incl. shipping.

05:30 <bofh_> the LM317T cost me $1 on Newark, the resistors I needed for it were <$0.01

05:31 <bofh_> the most expensive part were the OD4 laser safety goggles, which were a whopping... $50

05:32 <bofh_> getting high-power blue-to-UV solid-state LDs has not been an issue for awhile, 445nms are almost always Casio projector pulls (they're also apparently up to 3W now! in the same 5.6mm can! holy jesus), 405nms are bluray drive pulls usually (and often much weaker, 300mW is a common limit there).

05:33 <bofh_> pretty much as long as you can confirm it's a Nichia part you're good.

05:34 <bofh_> (also you need a proper collimating lens, the exact nature of which will vary based on task. also heatsink the everliving fuck out of the LD if you're going to run it at anything approaching full power, I once ran it at 500mW unheatsinked for a fraction of a second, touched the can immediately afterwards and burned myself).

05:35 <bofh_> (also this goes without saying that with Class 4 lasers, "do not look into laser with remaining eye" is no longer a joke. be careful. wear eye protection).

05:37 <bofh_> amusingly enough 650nm would be *harder*, since the GaAs substrates there don't lend themselves as nicely to high power output (250mW is often basically the upper bound).

05:37 <bofh_> it's really somewhat remarkable how powerful solid-state LDs have become in the UVA - Deep Blue part of the spectral band (315nm - 475nm)

07:34 <Sync> more amazing imho are those uv curing lasers

07:35 <Sync> they come in 20x20x8mm water cooled housings and are pushing over 100W optical power

07:41 <Sync> my prof has one of the first SiC blue diodes at his desk and also a prototype wafer of nakamuras InGaN ones

08:56 <SpeedEvil> bofh_: yes, I've got one too.

08:57 <SpeedEvil> bofh_: actually 3W - which was somewhat more

08:57 <SpeedEvil> http://www.ebay.co.uk/itm/6W-NUBM44-450nm-Laser-Diode-In-Copper-Module-W-Leads-Glass-Lens-/171841778046?pt=LH_DefaultDomain_0&hash=item280291717e

08:57 <SpeedEvil> But as I understand it, those actually have multiple dies

09:00 <SpeedEvil> http://www.photonlexicon.com/forums/showthread.php/24338-NUBM44-blue-New-Video

09:00 <SpeedEvil> I then tested the NUBM44 with only the G-9 collimator and the maximum output is 5.6W at4.4A. Increasing the current further causes the power to decrease. I also measured the beam dimensions of the two blue diodes and this is eye opening. At 50cm from the front of the collimator lens, the "3W", 9mm beam is 3mm high and 2mm wide. The beam from the NUBM44 at the same distance from its collimator is 3mm high and 7mm wide. In the far field and at the

09:00 <SpeedEvil> same 14M distance the 3W is 9mm high and 58mm wide while the NUBM44 is 12 mm high and 180mm wide!

09:01 <SpeedEvil> Or maybe just one wide die

09:33 <Sync> I suppose they have a side emitting stack

11:35 <SpeedEvil> yeah

17:42 <bofh_> 02:41 < Sync> my prof has one of the first SiC blue diodes

17:42 <bofh_> cool, I have one of those that was actually run into production

17:42 <bofh_> it's very interesting shade of blue. very weak light though.

22:17 <pie_> so whats the hard part of homecmos?

22:22 <SpeedEvil> All of it?

22:22 <SpeedEvil> Sourcing reagents isn't fun, purity is really hard, masking at fine geometries, ...

22:23 <pie_> ah well ok then

22:32 <nats`> and toxicity

22:32 <nats`> it's talking about deadly product

22:59 <Sync> toxicity is just an issue of good lab hygiene

22:59 <Sync> the real kicker for cmos is metal ion contamination

23:02 <pie_> something something copper?

23:02 <pie_> Sync: what does the contamination do?

23:23 <SpeedEvil> Stops stuff working, for no apparant or easily measurable reason

23:23 <SpeedEvil> Imagine if normal electronics fabrication failed if there was a lemon in the street.

23:28 <pie_> heh i suppose

23:28 <pie_> i mean like what does it do physically?

23:44 <Sync> well

23:44 <Sync> it gives you atoms in the middle of the band gap

23:44 <Sync> which kills off your semiconductors semiconducting

23:46 <pie_> ah i guessed as much

23:46 <pie_> now to figure out how that works exactly :P

23:47 <pie_> it turns it into a conductor?

23:47 <Sync> well, as I said

23:47 <Sync> it will give you a step in the middle of the band gap

23:48 <Sync> which charge carriers will happily go to

23:48 <pie_> right. ill study it a bit more later anyway