Abstract: Devices for deflecting an optical beam under the action of an ultrasonic beam propagating in a block of active acousto-optical material and operating under Bragg tangential conditions, with the acousto-optical interaction being anisotropic. The devices also include entry and exit faces into this material blocks which are inclined at angles .alpha. and .beta. such that the incoming beam and the emerging beam after the interaction are significantly parallel, keeping operation under Bragg tangential conditions. The devices can also be used to make a spectrum analyzer with a very large number of points and very high dynamics.

Abstract: The transducer is chiefly designed to generate acoustic waves in the microwave range in a crystalline support of a bulk wave delay line or a Bragg cell. The transducer has a plane contact region of a ground electrode partially covering a face of the substrate, a piezoelectric plate on the contact region and a second electrode defining the piezoelectrically active region of the transducer. So as not to make a direct solder on the electrode and thus, in particular, reduce the admittance of the transducer as compared with known transducers, the second electrode is connected to a large connection region, placed on the support face, by a link bridge. The connection region supports the connection by soldering. The admittance is thus independent of the thickness of the solder.