http://www.youtube.com/watch?v=g9z5ioZhNjE

[planters]

I just uploaded a new video where I evaluate the high power "650" nm, C-mount diodes that have been available from DTR for a month or two. The single diode that I test may not be representative of these diodes as a whole, but does give some values. You will also see some of the techniques I used and this may have applications for installing these diodes and for testing and taming other high power diodes as well.

I hope you enjoy it.

http://www.youtube.com/watch?v=g9z5ioZhNjE

[polishedball]

Off to take a look, thanks in advance. I know it will be worth a watch.

[steve-o]

Another excellent vid Eric! I now know which diodes I will be using for red, and which one I will not !
Thanks a bunch for the excellent review of the "650" "4-5W" (-ish) diode lol ..
Please keep these great vids coming ! I know we all appreciate you doing this !!
Happy Holidays to you and yours

[Galvonaut]

Great video Eric. Thanks for sharing

Keith

[Vidal Wolf]

Excellent and very educational video!
I appreciate the effort and detail you put into your reviews and experiments.

~Nate

[kl79]

Shure we enjoy it ! Thank for this rewiew, as said it a very good educational video.

And for this diode, ok the end of expensive high power red is not for now.

Mickael

[helium]

Great review, thanks. Nice looking workshop you have there.

[planters]

An interesting thing I mentioned in the video, but did not demonstrate very well is how good the vertical axis is. If you look carefully at the 90 degree bounce mirror, the core of the stripe's light in the vertical dimension is much less than the 3mm I state and is more like 1 mm. If these diodes were substantially less expensive it would be pretty straightforward to stack 6-8 of them and with a PBS 12-16 into a 9mm x9mm beam. This could place 36-48 W into a beam that would be better than a Laserscope and an easily modulated red compliment to that laser for big beam/big power outdoor shows. It is just too pricy to that for now.

[dnar]

Nice video as always. Thanks!

Thought, how could you split the Y axis into 2 and then combine back to a single beam with PBS?

[logsquared]

Great video. Thanks for posting.

The sample I bought from dtr had greater raw divergence as we discussed in another thread. In my sample the divergence was roughly proportional to the drive current.

My sample definitely made 4 watts at under 5 amps drive at room temp.

Most of my tests used a simple positive spherical lens. I dont remember being able to make the "wings" like yours. I wonder if your FAC is a bit off?