Devices and systems for opto-acoustic signal processing are described herein. In one embodiment, the device may include a structure configured to laterally confine travelling acoustic phonons (hypersound) throughout, a first multimode optical waveguide embedded within the structure, and an acoustic phonon emitter within the structure, where the first multimode optical waveguide is selected to couple to the acoustic phonons (hypersound) confined within the structure. In one embodiment, the system may include a first light source optically coupled to a proximal end of the first multimode optical waveguide, the first light source emitting a probe wave having a frequency ω.sub.p.sup.(1), and a driver configured to drive the acoustic phonon emitter to emit acoustic phonons (hypersound).

Devices and systems for opto-acoustic signal processing are described herein. In one embodiment, the device may include a structure configured to laterally confine travelling acoustic phonons (hypersound) throughout, a first multimode optical waveguide embedded within the structure, and an acoustic phonon emitter within the structure, where the first multimode optical waveguide is selected to couple to the acoustic phonons (hypersound) confined within the structure. In one embodiment, the system may include a first light source optically coupled to a proximal end of the first multimode optical waveguide, the first light source emitting a probe wave having a frequency ω.sub.p.sup.(1), and a driver configured to drive the acoustic phonon emitter to emit acoustic phonons (hypersound).

A method for fabricating a tunable optical phased array, and a tunable optical phased array are disclosed by the present application. The tunable optical phased array includes: a substrate layer (10), a distributed Bragg reflector (20), a support layer (30), a piezoelectric layer (40), an antenna array (60), and a transducer module (50) configured to make interconversion between a phase control signal and a surface wave; the antenna array (60) and the distributed Bragg reflector (20) are used to form a Fabry Perot resonant cavity, and the phase control signal output by a signal source is concerted into the surface wave by the transducer module (50), and the surface wave is conducted to the antenna array (60) through the piezoelectric layer (40).

A method for fabricating a tunable optical phased array, and a tunable optical phased array are disclosed by the present application. The tunable optical phased array includes: a substrate layer (10), a distributed Bragg reflector (20), a support layer (30), a piezoelectric layer (40), an antenna array (60), and a transducer module (50) configured to make interconversion between a phase control signal and a surface wave; the antenna array (60) and the distributed Bragg reflector (20) are used to form a Fabry Perot resonant cavity, and the phase control signal output by a signal source is concerted into the surface wave by the transducer module (50), and the surface wave is conducted to the antenna array (60) through the piezoelectric layer (40).

A light source assembly having N outputs, the assembly including: a light source arrangement arranged for supplying light to M inputs, where M an N independently of each other are integers and where M≥2 and M≥N; at least one optical couplers, each having at least one input arm and a plurality of output arms; and an integer number, P, of mode scramblers. The light source arrangement may include a broadband light source and a multimode coupler configured for receiving one or more light beams from the light source arrangement, wherein the one or more light beams being derived from the broadband light source and wherein a mode scrambler is arranged for mode scrambling one of said light beams before it enters the multimode coupler.

A light source assembly having N outputs, the assembly including: a light source arrangement arranged for supplying light to M inputs, where M an N independently of each other are integers and where M≥2 and M≥N; at least one optical couplers, each having at least one input arm and a plurality of output arms; and an integer number, P, of mode scramblers. The light source arrangement may include a broadband light source and a multimode coupler configured for receiving one or more light beams from the light source arrangement, wherein the one or more light beams being derived from the broadband light source and wherein a mode scrambler is arranged for mode scrambling one of said light beams before it enters the multimode coupler.

Systems and methods for steering an optical beam in two dimensions are disclosed. The system includes a substrate comprising an acousto-optic antenna array and an acoustic transducer. Each antenna of the antenna array includes a high-confinement surface waveguide carrying a light signal. The acoustic transducer imparts acoustic energy into each surface waveguide as a mechanical wave. Interaction of the light signal and mechanical wave in each surface waveguide induces light to scatter into free space. The light scattered out of the plurality of waveguides collectively defines the output beam. The longitudinal angle of output beam, relative to the substrate, is determined by the relative frequencies of the mechanical waves and the light signals. The transverse angle of the output beam is controlled by controlling the relative phases of the mechanical waves and/or light signals across the surface-waveguide array.

A light source assembly having N outputs is disclosed. The assembly comprising: a light source arrangement arranged for supplying light to M inputs, where M an N independently of each other are integers and where M≥2 and M≤N; at least one optical couplers, each having at least one input arm and a plurality of output arms; and an integer number, P, of mode scramblers; The light source arrangement may comprise a broadband light source and a multimode coupler configured for receiving one or more light beams from the light source arrangement, wherein the one or more light beams being derived from the broadband light source and wherein a mode scrambler is arranged for mode scrambling one of said light beams before it enters the multimode coupler.

A light source assembly having N outputs is disclosed. The assembly comprising: a light source arrangement arranged for supplying light to M inputs, where M an N independently of each other are integers and where M≥2 and M≤N; at least one optical couplers, each having at least one input arm and a plurality of output arms; and an integer number, P, of mode scramblers; The light source arrangement may comprise a broadband light source and a multimode coupler configured for receiving one or more light beams from the light source arrangement, wherein the one or more light beams being derived from the broadband light source and wherein a mode scrambler is arranged for mode scrambling one of said light beams before it enters the multimode coupler.

A method includes directing a first plurality of probe laser pulses through a sample, dividing each of the first plurality of probe laser pulses to generate a first interferogram, and generating first image data reproducible as a first phase image of the sample. A plurality of pump laser bursts are directed onto the sample to heat the sample. A second plurality of probe laser pulses are directed through the sample at a predetermined time delay. Each of the second plurality of probe laser pulses are divided to generate a second interferogram. Second image data is generated that is reproducible as a second phase image of the sample. A transient phase shift is determined in the second phase image relative to the first phase image. A vibrational spectroscopy property is determined of the sample based on the transient phase shift, thereby allowing an identification of chemical bond information of within the sample.