US PATENT SUBCLASS 359 / 287
.~.~.~.~ Frequency modulation

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

237  DF  OPTICAL MODULATOR {3}
238  DF  .~ Light wave temporal modulation (e.g., frequency, amplitude, etc.) {3}
240  DF  .~.~ Changing bulk optical parameter {5}
285  DF  .~.~.~ Acousto-optic {2}
287.~.~.~.~ Frequency modulation

DEFINITION

Classification: 359/287

Frequency modulation:

(under subclass 285) Subject matter wherein the frequency of a constant amplitude optical wave (i.e., carrier wave) varies in synchronization with the amplitude of the applied signal (i.e., modulating signal).

SEE OR SEARCH THIS CLASS, SUBCLASS:

278, for electro-optic frequency modulation.