US PATENT SUBCLASS 359 / 342-- .~ Particular active medium (e.g., crystal, plasma, fluid, etc.)

US PATENT SUBCLASS 359 / 342
.~ Particular active medium (e.g., crystal, plasma, fluid, etc.)

Current as of: June, 1999
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359 /	HD	OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

333	DF	OPTICAL AMPLIFIER {11}
342		.~ Particular active medium (e.g., crystal, plasma, fluid, etc.) {2}
343	DF	.~.~> Glass (amorphous)
344	DF	.~.~> Semiconductor

DEFINITION

Classification: 359/342

Particular active medium (e.g., crystal, plasma, fluid, etc.):

(under subclass 333) Subject matter wherein a specified type of active medium, which uniquely causes the amplification of the light input, is used to change the number of atoms or atomic system in a set of energy levels as a result of the absorption of light incident on the material of the medium.

(1) Note. The examples of crystal, plasma, and fluid define the physical state of the active medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

343, for a glass (amorphous) medium.

344, for a semiconductor medium.

SEE OR SEARCH CLASS

372, Coherent Light Generators,

39+, for a particular active medium which is not used for amplification of a light beam input.