US PATENT SUBCLASS 359 / 331
.~ Optical laser acoustic delay line type


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

326  DF  OPTICAL FREQUENCY CONVERTER {5}
331.~ Optical laser acoustic delay line type


DEFINITION

Classification: 359/331

Optical laser acoustic delay line type:

(under subclass 326) Subject matter wherein the output from a laser is mode-locked and passed through an acoustic cell in which a radio frequency acoustic wave has been generated; the laser beam is diffracted, and one of the frequency shifted diffracted modes is heterodyned at a detector with an unshifted mode to produce a time delayed radio frequency output signal lower in frequency than the input signal.