Abstract: A passive mode-locked laser method and system, the system comprising a nonlinear optical loop comprising a resonant nonlinear element, coupled to an amplification section by a beam splitter, the beam splitter splitting a light beam from the amplification section into light beams propagating in opposite directions around the nonlinear optical loop, the resonant nonlinear element acting as both a nonlinear element and a narrow bandwidth filter for the laser system, allowing mode-locking operation of the system on a single resonance of the resonant nonlinear element.

Abstract: A system and method for phase-readout/control and active stabilization on arbitrary interferometric phase in the optical interferometer platform is disclosed. The method makes use of a bi-colored polarization-multiplexed reference laser scheme. The disclosed scheme is based on two phase-locked reference signals with different frequencies that together remove the phase ambiguity. The two signals are polarization-multiplexed (either in free-space or optical fiber implementations) to enable easy separation and combining of these two signals through the use of polarization beam-splitters. The disclosed scheme provides a one-to-one map between phase and feedback signal levels, and enables phase-readout and stabilization even when one of the feedback-signals is at a maximum/minimum.

Abstract: A method and a system method for generating optical multipartite quantum states, comprising generating optical fields by at least two different spontaneous four-wave mixing processes and overlapping the optical fields spontaneously generated from the different spontaneous four-wave mixing processes into a same resonator mode of a third-order nonlinear resonator. The system comprises a multi-colored laser source exiting a nonlinear third-order resonator at different resonance frequencies belonging to different mode families of the resonator.

Abstract: A passive mode-locked laser method and system, the system comprising a nonlinear optical loop comprising a resonant nonlinear element, coupled to an amplification section by a beam splitter, the beam splitter splitting a light beam from the amplification section into light beams propagating in opposite directions around the nonlinear optical loop, the resonant nonlinear element acting as both a nonlinear element and a narrow bandwidth filter for the laser system, allowing mode-locking operation of the system on a single resonance of the resonant nonlinear element.

Abstract: A method and a system for pulsed excitation of a nonlinear medium for photon pair generation, he method comprising exciting a single narrow resonance of a nonlinear resonant element with a pulsed laser field, comprising embedding a nonlinear resonant element directly into an external laser cavity and locking the cavity modes.

Abstract: A method and a system for terahertz detection, using at least a first and a second electrodes separated by a centro-symmetric material. The system comprises at least a first and a second electrodes with conductive pads for connection to a voltage source, separated by a centro-symmetric material; the method comprising second harmonic generation in the centro-symmetric material by overlapping of a probe and a terahertz beams.

Abstract: A method and a system for generating terahertz signals, the system comprising a pump source, a two-wire waveguide; and at least one terahertz source, wherein the terahertz source is embedded within the two-wire waveguide and the pump source is configured to illuminate the terahertz source, the terahertz source generating terahertz signals directly within the two-wire waveguide. A terahertz source, embedded within a two-wire waveguide, said source being configured to be illuminated within the two-wire waveguide with a pump source for generating terahertz signals directly inside the two-wire waveguide. A two-wire waveguide system is thus provided, comprising a two-wire waveguide and a terahertz source embedded between the wires of the two-wire waveguide and configured to be illuminated within the two-wire waveguide with a pump source for generating terahertz signals directly inside the two-wire waveguide.

Abstract: A method and a system for generating tera-hertz signals, the system comprising a pump source, a two-wire waveguide; and at least one terahertz source, wherein the terahertz source is embedded within the two-wire waveguide and the pump source is configured to illuminate the terahertz source, the terahertz source generating terahertz signals directly within the two-wire waveguide. A terahertz source, embedded within a two-wire waveguide, said source being configured to be illuminated within the two-wire waveguide with a pump source for generating terahertz signals directly inside the two-wire waveguide. A two-wire waveguide system is thus provided, comprising a two-wire waveguide and a tera-hertz source embedded between the wires of the two-wire waveguide and configured to be illuminated within the two-wire waveguide with a pump source for generating terahertz signals directly inside the two-wire waveguide.

Abstract: A method and a system for terahertz detection, using at least a first and a second electrodes separated by a centro-symmetric material. The system comprises at least a first and a second electrodes with conductive pads for connection to a voltage source, separated by a centro-symmetric material; the method comprising second harmonic generation in the centro-symmetric material by overlapping of a probe and a terahertz beams.