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The Ruby Rod is the most important part
of this kind of Laser. The rod used for this project has
caracteristics as follow:
Overall lenght : 75mm Both ends are
flat,parallel, polished and mirrored. This means the rod doesn't need
any resonant cavity to lase, but there isn't any chance to introduce
any other optical component (eg. etalons, polarizer,q-switch, ect.) in
the resonant cavity; on the other hand mirrors alignment is not
required. Less work for me... Minimum
Threshold Energy (Emin)
: 5 J /mm (375 J for the entire rod) The cost for a similar bar is from
several hundreds of euros. Check on ebay.com
if somebody sells one.
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