| 摘要 |
A plurality of flowing (or nonflowing) sheets of active liquid laser media, generally having different color emissions, are each optically excited along at least one of its major surfaces to produce a plurality of coherent electromagnetic radiations each characteristic of the liquid medium employed. In one embodiment, single sheets of a plurality of the liquid laser media are produced in superposed orientation in a liquid-tight chamber, and a multi-color colinear beam of coherent electromagnetic radiation having the combined radiation characteristics of the plurality of liquid laser media, longitudinally transverses the superposed liquid laser media sheets in an off-axial direction to effect multiple total internal reflections of the beam and cause each ray thereof to pass through substantially identical thermal environments thereby substantially reducing distortion of the beam wavefront. In another embodiment, spaced refracting prisms are positioned in a liquid-tight chamber and a plurality of separate zig-zag patterns of the laser liquid sheets are formed in the spacings between adjacent prisms to produce a like plurality of spatially separate laser beams. The pumping radiation is incident on the refracting prisms and is refracted and reflected through the prisms to produce substantially uniform pumping along the major surfaces of the sheets of liquid laser media. The pumping means is laterally positioned with respect to the laser beam axes which coincide with the longitudinal axes of the zig-zag patterns. In this case also, each ray of a beam of coherent electromagnetic radiation experiences the same temperature distribution as it passes through a sheet of liquid laser medium, thereby substantially reducing distortion of the beam waveform.
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