Appeal No. 2005-0616 Page 8
Application No. 09/661,653
Figure 1 shows a schematic representation of a circulating liquid laser. A
circulating liquid laser is one in which the liquid active material continuously flows
through a closed system. The liquid active material is an inorganic solution of a
compound containing an active ion, an inorganic solvent and a Lewis acid. Although
many such solutions may be employed, in the preferred form of Kocher's invention the
active ion is tri-valent neodymium, the inorganic solvent is phosphorus oxychloride and
the Lewis acid is zirconium tetrachloride.
The circulating liquid laser consists of a resonant cavity 10 having a longitudinal
axis 11 and containing a cell 12 and mirrors 14 and 16 located adjacent the opposite
end of laser cell 12. Mirrors 14 and 16 may either be mounted externally to cell 12, as
shown in Figure 1, or may take the form of reflective coatings placed directly on the end
faces 18 and 20 of the cell. One of the mirrors, for example, mirror 14, is totally
reflective, i.e., it reflects substantially all of the light impinging upon it. The other mirror,
mirror 16, is only partially reflective in that it reflects only a portion of the light impinging
upon it while permitting the remainder of the light to be transmitted there through as the
output beam of the laser.
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