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Firsts Casio diode hologram @ 445nm

Posted: Wed Jul 28, 2010 8:48 pm
by dave battin
OH Boy, here we go again! :doh:

Firsts Casio diode hologram @ 445nm

Posted: Wed Jul 28, 2010 8:59 pm
by Danny Bee
this is only the Beginning ther is more to come stay tune !!!!!!!!!!!

Firsts Casio diode hologram @ 445nm

Posted: Thu Jul 29, 2010 1:28 pm
by dave battin
here's a quick video of this hologram showing no banding at all !


Firsts Casio diode hologram @ 445nm

Posted: Thu Jul 29, 2010 7:05 pm
by Thieu
Congratulations Dave, this is great news!

Firsts Casio diode hologram @ 445nm

Posted: Fri Jul 30, 2010 11:17 am
by dave battin
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!

Firsts Casio diode hologram @ 445nm

Posted: Fri Jul 30, 2010 1:20 pm
by Dutchelm05
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

Firsts Casio diode hologram @ 445nm

Posted: Fri Jul 30, 2010 5:06 pm
by dave battin
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 ................

Firsts Casio diode hologram @ 445nm

Posted: Fri Jul 30, 2010 5:20 pm
by Dutchelm05
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

Firsts Casio diode hologram @ 445nm

Posted: Fri Jul 30, 2010 5:33 pm
by Joe Farina
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.

Firsts Casio diode hologram @ 445nm

Posted: Fri Jul 30, 2010 6:26 pm
by Dutchelm05
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??