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Its about size of emitting point as well, Laser diodes have a very very small emitting point. Without taking other considerations (coherent etc) this is also the reason spot will be smaller when focused than with other light sources. You can't get so small emitter with that huge amount of...

Yes, ok, but these bluray diodes are multimode. Even if you get stable WL this is not a narrow band so I don't expect any coherent emission with SHG. Maybe 1-2mW of UV if lucky for a 1,5W 405nm? So if you need cooling control for just couple mW UV (or maybe nothing) I can't see the benefits for...

Why not 450nm for SHG? But I can't imagine how you could get SHG phase matching from a M2>5 MM blue TO Can diode. Moreover peak WL is going to change depending of current and temp, but also, from one diode to another.

nice! did you measured 640nm power output? efficiency? thanks, great work!

Too big NF...

I purchased 2 units 638nm TO-5 1,2W FAC Square spot. Not useful for me. I can sell at lower price. PM if interested. Thanks!

Is that a NUBM44 with a can? So did you removed G-BALL and a added a can?

It seems this divergence is measured after Gball lens. Otherwise have no sense for me. It could be great to know divergence before Gball to compare with G84. I purchased one G84 (dual beam) direct from mitsu to test, and divergence from each beam is worse than even NUBM44. So maybe for pointer...

and what collimator? dot will be about the same if 3elem on red (say p73) and G2 on blue. Is that the trick? Nice host btw

Side or End pump with a 808nm diode

OMG! what a beauty! awesome work guys!

Hey! this is the place! Welcome

Yep, right. However dummy load is not exactly the same load than a Laser diode. So this is not 100% accurate, but yes, maybe the better approach. There are some drivers with current balance resistor on the output. On this drivers, Another way is to measure voltage falling across this resistor...

or measure current on the dc input. Reading is almost the same.

woooow! what an awesome work! High tech art. A pleasure for my eyes, thanks for sharing!!

Agree. Thanks for the drawing. On side-to-side diode setup this is (as I know) the only way to get the same divergence/beam size each beam. A single cyl set is possible but beam length path for each diode must be the same when reaching the 1st CV. Because all we know distance from cyls affects...

This is why I go with achromatics doublets/triplets positive lenses on my RGB SF, to minimise focal shift because of refractive index. They work pretty good..of course lenses must be high quality.

I've been done lots of SF with combined wavelengths on my modules and yes, it clips 638 (if required) but also cleans both wavelengths, granted (you have to get a perfect NF/FF alignment first). You must go with achromatic lenses and find which aperture diameter better suits your needs (usually...

It is possible to get a solid yellow on multimode diodes with a pair of PBSed P73 and one 700mW or 1W 520 green Nichia. You have to expand green until about 3mm to get 1mrad (better with cyls), and about 5mm for combined red to get 1mrad as well (cyls again). Accurate NF-FF beam measuring is...

Great!! go go CDBeam! clap-clap-clap