Appeal No. 2005-0616 Page 7
Application No. 09/661,653
a lasing liquid containing trivalent titanium ions dissolved in a liquid host
within said first lasing chamber and said second lasing chamber,
a first semiconductor pumping device operatively connected to said first
lasing chamber for optically exciting said trivalent titanium ions dissolved in a
liquid host within said first lasing chamber, said first semiconductor pumping
device comprising at least one semiconductor diode for optically exciting said
trivalent titanium ions in the 800 to 900 nm region,
a second semiconductor pumping device operatively connected to said
second lasing chamber for optically exciting said trivalent titanium ions dissolved
in a liquid host within said second lasing chamber, said second semiconductor
pumping device comprising at least one semiconductor diode for optically
exciting said trivalent titanium ions in the 800 to 900 nm region,
a closed loop circulation system for circulating said trivalent titanium ions
dissolved in a liquid host, said closed loop circulation system comprising
a first portion for circulating said lasing liquid containing trivalent titanium
ions dissolved in a liquid host into and out of said first lasing chamber in a first
direction, and
a second-portion for circulating said lasing liquid containing trivalent
titanium ions dissolved in a liquid host into and out of said second lasing chamber
in a second direction that is opposite to said first direction, said closed loop
circulation system including a pump and a heat exchanger.
The teachings of the applied prior art
Kocher
Kocher's invention relates to lasers and in particular to cells for lasers
which utilize a flowing liquid as the active material. Kocher teaches (column 1, lines 6-
11) that:
Solids, gases and liquids have been used as active materials in lasers.
Lasing is initiated by raising the energy levels of the atoms in the active material
from the level which they normally occupy to a higher energy level or excited
state. This process of excitation is generally accomplished in a liquid laser by a
high intensity light source.
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