公开(公告)号：US11894830B2

公开(公告)日：2024-02-06

申请号：US17418824

申请日：2019-12-27

申请人： THALES ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  FREC'N'SYS ,  YNCREA HAUTS DE France ISEN LILLE ,  UNIVERSITE DE LILLE ,  ECOLE CENTRALE DE LILLE ,  UNIVERSITE POLYTECHNIQUE HAUTS-DE-FRANCE

发明人： Thi Mai Pham Colomban ,  Claude Prévot ,  Paolo Martins ,  Anne-Christine Hladky-Hennion ,  Bertrand Dubus ,  Marianne Sagnard ,  Thierry Laroche ,  Sylvain Ballandras ,  Charles Croenne

IPC分类号： H03H9/145 ,  H03H9/02 ,  H03H9/64

CPC分类号： H03H9/14502 ,  H03H9/02637 ,  H03H9/02992 ,  H03H9/64

摘要： A surface acoustic wave device includes at least one transducer; two acoustic reflectors disposed on either side of the at least one transducer so as to form a cavity, each acoustic reflector comprising an array of electrodes in the form of lines parallel with each other, each array comprising a subset of electrodes connected to a reference potential denoted mass defining a first connection type, and a subset of electrodes that are not connected to any potential, i.e. that have a floating connection defining a second connection type; at least one switching circuit configured to modify the distribution of the connections of at least one part of the electrodes of each array between the different connection types.

公开(公告)号：US20210035549A1

公开(公告)日：2021-02-04

申请号：US16969054

申请日：2019-02-08

申请人： CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  UNIVERSITE DE LILLE ,  YNCREA HAUTS DE FRANCE ISEN LILLE

发明人： Arnaud DEVOS

IPC分类号： G10K15/04

摘要： A phonon parametric oscillator is provided. The phonon parametric oscillator comprises a laser for periodically emitting brief optical pulses (IL), an assembly for generating acoustic pulses (IA) and a medium for coupling the acoustic pulses to an object (O), the assembly for generating acoustic pulses comprising an entrance face, an exit face, a conversion medium for converting the brief optical pulses into acoustic pulses and a propagation medium for propagating said acoustic pulses, the entrance and exit faces being reflective to the acoustic pulses, the propagation medium having a defined thickness, the exit face making contact with the coupling medium. In the phonon parametric oscillator according to the invention, the round-trip time of an acoustic pulse due to reflection from the entrance and exit faces, is equal to the emission period (τ) of the laser, so that the reflected acoustic pulse is in phase with the following acoustic pulse.

公开(公告)号：US11948548B2

公开(公告)日：2024-04-02

申请号：US16969054

申请日：2019-02-08

申请人： CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  UNIVERSITE DE LILLE ,  YNCREA HAUTS DE FRANCE ISEN LILLE

发明人： Arnaud Devos

IPC分类号： G10K15/04

CPC分类号： G10K15/046

摘要： A phonon parametric oscillator is provided. The phonon parametric oscillator comprises a laser for periodically emitting brief optical pulses (IL), an assembly for generating acoustic pulses (IA) and a medium for coupling the acoustic pulses to an object (O), the assembly for generating acoustic pulses comprising an entrance face, an exit face, a conversion medium for converting the brief optical pulses into acoustic pulses and a propagation medium for propagating said acoustic pulses, the entrance and exit faces being reflective to the acoustic pulses, the propagation medium having a defined thickness, the exit face making contact with the coupling medium. In the phonon parametric oscillator according to the invention, the round-trip time of an acoustic pulse due to reflection from the entrance and exit faces, is equal to the emission period (τ) of the laser, so that the reflected acoustic pulse is in phase with the following acoustic pulse.