[Laser] DPSS Laser weirdness

[Chuck Hast]

On 7/12/07, Sresal <sresal at gmail.com> wrote:
> -In some cases, I've seen the pump diode tune out of the optimal
> absorption band of the Nd host if the diode gets too hot, then the
> output power drops because it is wing-pumping the crystal.

OK, this would certainly explain some of what I see, I did notice that the
rapid dropping of power with no real on time corrected it's self when I lightly
tapped the head. Then at that point it would run about a minute without
dropping in power, which is what I had expected.

I had not seen the term "wing-pumping" before, I looked it up, but did not
get a clear understanding of the meaning. In some information it appeared
that they used it to describe a position of the pump diode with respect to
the crystal. In others it appeared to describe pumping of the crystal off
freq, which is what your explanation appears to mean.  Thanks for the
info.



-- 
Chuck Hast  -- KP4DJT --
To paraphrase my flight instructor;
"the only dumb question is the one you DID NOT ask resulting in my going
out and having to identify your bits and pieces in the midst of torn
and twisted metal."