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Re: combining laser beams

I forgot to add the obvious, the "amplifier" must received
energy to populate excited levels. I suppose this can
be done with visible non-coherent light.

On Wednesday, Dec 11, 2002, Ludwik Kowalski wrote:

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."