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Alot of places round it up to 9. it's actually 8.5 according to most spec sheets I found. I looked them all up and verified they're all correct. though ultimately it doesn't matter as quartz still gives the desired effect. as would a razorblade most likely.

I believe you are correct. IIRC quartz is a 7, most borosilicate glass is about 5.5 (depending on the type) and yag is 8.5 i think.

do a moh's hardness test. you can very lightly scratch the (non optical) side at one end a bit with something hard enough to scratch glass. YAG is hard like sapphire and fairly hard to damage so if it's a yag rod, then you'll know quickly as it wont scratch easily. glass is soft and doesn't dump...

you dont wanna know how long its been for me. lol too long.

It has to do with the way it was aligned-the OC is curved so if it isn't spot on then the beam leaves at a slight angle. though you shouldn't have opened that module, a lot of CNI's modules are moisture sensitive so you shouldn't have unsealed it except for repairs...they've got sealant on the...

Good stuff! Lots of good news coming in lately. I’m actually busy myself fixing a bunch of coherent lasers. Exciting new year looks like.

Using a helium neon laser as a reference is actually a good idea, The problem is is that in order for it to be a valid reference they have to all go in at exactly the same angle, which can lead to some complications depending on how you do it. Though overall it’s not hard just time-consuming...

Yeah I know bob. He's a good guy-he actually has a couple of my former lasers in his collection somewhere. I kinda want to visit him sometime.

lol yeah. my oldest one is from '68 I think if I remember correctly. It's incredibly old-so old in fact it has a filament in it instead of a cold cathode.

well if you got lucky, yeah you could do a nitrogen laser, or maybe find a UV HeCd, alot of those have been floating around ebay, but they are very fragile and hard to ship. those are your cheapest uv options.

Yeah this is great stuff. I need to finish mine...man I've been lazy. keep us updated on what you do with this massive beast!

I got some cool stuff to post too, but it'll have to wait as i haven't got pictures uploaded yet

yeah you can use Ti:sapph mirrors too. since they're tunable about 675-1100nm, my last one used a ti:sapph oc and a ruby HR iirc. I've also used a silvered mirror. both planar makes it hard to align though, but is typical for a high power laser like this.

Lol it is cool! I just find that realistically you can get the same effect from a lot of other sources for far cheaper. I find the 325 from a hecd is more interesting in many cases.

It's not a cube, it's an RCS. Though, yeah I remember those when they were on sale too...though frankly that'd be a waste tearing something like that apart, assuming you could even get it out. (probably) The cube is small enough though frankly to be made into a somewhat large handheld in that...

The diode doesn’t, the power supply I’m using does. If it detects a current surge that takes it higher than I allow, it shuts down the diode current source to keep it from popping. I had a hard limit of 200mA set. Yes. :) I mentioned this earlier.

Tested my 375 labby. Just for reference I have it set at 75mA, and it is doing 9.6mW at a very slightly chilled temp. so maybe you can find something with that info? I haven't yet.

I believe it. I was considering calling them and asking if they could rebuild mine into a different configuration myself, but it's not pressing so I haven't done it.

Did you swap parts in it again? It was much wider than that last time. If you have data to back it up, then sure, you're a smart guy and I know you'd not post something inaccurate on a whim. the reader was only 2048 I think wide, so the range you have set up for it can only go so far. I been...

That may be somewhat part of it, but not much. Keep in mind your spectrometer is not as accurate as mine is. yours is +/- a couple nm, mine is +/-0.1nm. your range is much wider than mine, so your accuracy and drift are much more worse. yours may not always be quite perfect. These don't change...