US PATENT SUBCLASS 372 / 39
PARTICULAR ACTIVE MEDIA

Current as of: June, 1999
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372 /   HD   COHERENT LIGHT GENERATORS

39PARTICULAR ACTIVE MEDIA {7}
40  DF  .~> Amorphous (e.g., glass)
41  DF  .~> Insulating crystal {1}
43  DF  .~> Semiconductor {1}
51  DF  .~> Liquid {3}
55  DF  .~> Gas {6}
66  DF  .~> Active media with particular shape {1}
68  DF  .~> Plural active media or active media having plural dopants

DEFINITION

Classification: 372/39

PARTICULAR ACTIVE MEDIA:

(under the class definition) Subject matter wherein the media in which most of the atoms can be placed in an excited state (i.e., population inversion state), so that an electromagnetic wave of the proper frequency passing through the media can stimulate a cascade of photons, is specified.