US PATENT SUBCLASS 372 / 22
.~.~ Frequency multiplying (e.g., harmonic generator)

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372 /   HD   COHERENT LIGHT GENERATORS

9  DF  PARTICULAR BEAM CONTROL DEVICE {10}
21  DF  .~ Nonlinear device {1}
22.~.~ Frequency multiplying (e.g., harmonic generator)

DEFINITION

Classification: 372/22

Frequency multiplying (e.g., harmonic generator):

(under subclass 21) Subject matter in which the nonlinear device provides an output beam whose frequency is a multiple of the frequency of the input beam.