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I remember reading about laser beam amplifiers. For the
low power used in communication optical fibers doped
with rare earth atoms do this very well. Power-out is much
higher than power-in and no loss of the encoded
information. The "amplifier" is designed for one specific
wavelength, such as 1.3 or 1.5 microns. I guess you can
call it a "second laser."
Ludwik Kowalski
On Wednesday, Dec 11, 2002, at 17:37 US/Eastern, Carl E. Mungan
wrote:
Thanks for the replies so far. I can see I need to say more. Aof
half-silvered mirror won't do because I want to combine the power
the beams, not throw half of it away.power
One reason to try to do this coherently is that you end up with 4
times the power of the original beams (say both have the same
for simplicity) rather than just 2 times. Also, you wouldprobably
have better beam quality.laser
Specifically, I was thinking of combining the outputs of the
stripes off a semiconductor bar. This would then be used as an(F)
optical pump source for stimulated emission experiments, hence
another need for high beam quality not just raw power.
--
Carl E. Mungan, Asst. Prof. of Physics 410-293-6680 (O) -3729
U.S. Naval Academy, Stop 9C, Annapolis, MD 21402-5026http://physics.usna.edu/physics/faculty/mungan/
mungan@usna.edu