(under subclass 333) Subject matter wherein the laser material does not have to be continually pumped since the laser stays in a lasing state for multiple traverses of light throughout the lasing medium to produce amplified light beams that last longer than the period for the pumping itself.
SEE OR SEARCH CLASS
356, Optics: Measuring and Testing,
350, for ring lasers with interfering different frequency beams.
372, Coherent Light Generators,
94, for ring configuration folded resonant cavity.
