Firsts Casio diode hologram @ 445nm

dave battin · Post by **dave battin** » Wed Jul 28, 2010 8:48 pm

OH Boy, here we go again! :doh:

Danny Bee · Post by **Danny Bee** » Wed Jul 28, 2010 8:59 pm

this is only the Beginning ther is more to come stay tune !!!!!!!!!!!

dave battin · Post by **dave battin** » Thu Jul 29, 2010 1:28 pm

here's a quick video of this hologram showing no banding at all !

Thieu · Post by **Thieu** » Thu Jul 29, 2010 7:05 pm

Congratulations Dave, this is great news!

dave battin · Post by **dave battin** » Fri Jul 30, 2010 11:17 am

Thank you all, it was quite exciting to see these little suckers work! This weekend i plan on doing a few DCG tests,and i am sure it will pass with flying colors!

Dutchelm05 · Post by **Dutchelm05** » Fri Jul 30, 2010 1:20 pm

Really wonderful stuff Dave.
So the Casio diode is it rated for TEM00 and has a long coherrence length? Or did you get one that was a freak of nature?
Did you build your own heatsink and driver?

Good luck this weekend
Look forward to seeing great stuff as always...

T

dave battin · Post by **dave battin** » Fri Jul 30, 2010 5:06 pm

In one word "yes"! here is the laser unit im making now it looks to be putting out 50mw with a coherent length of up to 20 inches ................

Dutchelm05 · Post by **Dutchelm05** » Fri Jul 30, 2010 5:20 pm

Thanks Dave, very nice work.

Are these lasers rated for like a 1 watt? Did you just turn it down or is this a different model that the one I've seen?

Best of luck,
T

Joe Farina · Post by **Joe Farina** » Fri Jul 30, 2010 5:33 pm

Nice, Dave.

Hi Tony. I don't mean to upstage Dave's reply, but these diodes are rated at 1 watt. They can't be run nearly that high for our purposes, or else they will have multimode output. So they need a much lower current. In free-running mode (no feedback) I think Wler was able to go up to around 60mW (take a look at Wler's blog, which is linked in the first post on "blue frenzy hits the holographer too." I'm not sure what the output is with microscope-slide feedback (see the recent posts by Thieu, and his blog). Both Wler and Ahmet are hard at work with ECDL versions, which are more complex, but might provide much higher powers.

Dutchelm05 · Post by **Dutchelm05** » Fri Jul 30, 2010 6:26 pm

Thanks Joe, good to hear from you.
I am excited about Dave's work and hope it is fruitful
What is ECDL versions??
Are you buying one??