The present disclosure is directed to an optically active medium comprising dye aggregates and optionally a nucleotide oligomer or other nucleotide-based architecture, which may be used in in optical devices, in particular nonreciprocal devices (i.e., devices in which energy flows in one direction only), that can respond to differences in the polarization of light. An analysis is presented of the energy levels and the strengths of the optical transitions (changes in energy states) for a three-chromophore (dye) aggregate in which the chromophores are coupled with a J-like (i.e., end-to-end) stacking. Specific devices and methods of use are also disclosed herein.

The present invention provides devices, systems, and methods for producing bi-photons without the need for complex alignment or source design by the user. The invention provides a tunable source of high-brightness, high-visibility, bi-photons that can be configured for a number of applications.

It discloses a system and a method for generating heralded single photons, wherein the system comprises a high-quality optical ring cavity, a PPKTP nonlinear crystal, a polarization beam splitter, a dichroic mirror, a light filtering device, a reflector module, an atomic vapor cell and a single photon detector, wherein: the high-quality optical ring cavity is formed by a first plano-concave reflector, a second plano-concave reflector, a third plano-concave reflector and a fourth plano-concave reflector; the PPKTP nonlinear crystal and the polarization beam splitter are positioned in an optical path between the first plano-concave reflector and the second plano-concave reflector; the dichroic mirror is positioned in an optical path behind a reflecting end of the polarization beam splitter.

A method and a system for generating intense, ultrashort pulses of XUV and soft X-ray radiation via high-order harmonic generation (HHG), the method comprising selecting a nonlinear solid target and a laser source; separating a beam from the laser source into a first laser beam and a second laser beam; focusing the first laser beam onto the nonlinear solid target, thereby generating a laser ablated plume; and compressing and frequency-doubling the second laser beam and directing a resulting second compressed and frequency-doubled laser beam to the laser ablated plume, thereby yielding high-order harmonic generation of radiation of photon energies in a range between 12 eV and 36 eV. A high-order harmonic source of radiation, comprising a nonlinear solid target; a laser source; a beam splitter separating a beam from the laser source into a first beam line and a second beam line; the first beam line comprising a first focusing unit directing a first, uncompressed, laser beam onto the nonlinear solid target, to generate a laser ablated plume; and the second beam line directing a second, compressed and frequency-doubled laser beam, to the laser ablated plume, yielding high-order harmonic generation of radiation of photon energies in a range between 12 eV and 36 eV.

Disclosed is an apparatus for single-pixel imaging using quantum light, the apparatus including: a light source which generates a photon pair through spontaneously parametric down conversion of a non-linear crystal and splits the photon pair into an idler photon of first polarized light and a signal photon of second polarized light; a signal processing unit which aligns the signal photon with the first polarized light and modulates the signal photon with a pattern of a spatial light modulator, and sends the modulated signal photon to a target; and a signal detecting unit which simultaneously measures signal photons collected after an interaction of the idler photon and the target to obtain an image.

An optical resonator frequency comb (1) comprising a main optical resonator (2) being made of a resonator material, which has a third order nonlinearity and an anomalous resonator dispersion; a continuous wave (cw) laser (4) configured for supplying continuous laser light into an optical waveguide (5), which is coupled with the main optical resonator. The cw laser (4), the optical waveguide (5) and the main optical resonator (2) are arranged for resonantly coupling the cw laser light into the main optical resonator (2) for forming a single dissipative soliton circulating in the main optical resonator (2) corresponding to the generation of a frequency comb. Furthermore, the optical resonator frequency comb further comprises an auxiliary optical element (3, 25, 26) configured to induce a phase shift to a frequency comb component at the cw laser frequency to enhance the conversion efficiency of a generated frequency comb. The disclosure also relates to an associated method.

A device component assembly including an upper support plate (USP) of glass and a lower support plate (LSP) of metal affixed to the USP, and a manufacturing method are provided. The USP and the LSP include openings of different shapes and sizes. The LSP includes gaps cut in different directions for reducing thermal expansion and tension generated during a temperature shift. Device components including optical, mechanical, electric, electronic, and optoelectronic components are mutually optically aligned and mounted on the USP and/or the LSP based on component requirements. The device components are mounted on the LSP through the openings of the USP. The optical components are affixed to the support plate(s) using a fastening material. One or more heat transfer members are affixed to the LSP for mounting the device component(s) thereon, after mutual optical alignment therebetween. The device component assembly is integrated in an optical or optoelectronic module or system.

An assembly including a non-linear element configured for generating broadband radiation from input radiation coupled into the non-linear element. The assembly further includes an optical element positioned downstream of the non-linear element configured to reflect a fraction of the broadband radiation back into the non-linear element. The non-linear element can be a nonlinear fiber, such as a hollow-core photonic crystal fiber (HC-PCF).

An optical source including a supercontinuum generation apparatus including a pump light source, a twisted photonic crystal fibre, PCF, and a wideband quarter-wave retarder. The pump light source is arranged to provide circularly polarised pump light. The twisted PCF is arranged to receive the pump light and to convert the pump light into circularly polarised supercontinuum light. The wideband quarter-wave retarder is arranged to convert the circularly polarised supercontinuum light into linearly polarised supercontinuum light. The optical source may additionally include a wavelength tunable bandpass optical filter arranged to transmit the linearly polarised supercontinuum light at wavelengths within a selected range.

An electromagnetic radiation frequency, or equivalent wavelength, converter, the converter including a nonlinear optical component or part having or consisting of a predetermined nonlinear optical material, and a guiding module. The guiding module has a predetermined geometry defining or controlling an effective refractive index of the guiding module, and is configured to receive and guide pump light resulting in a guided pump beam. The nonlinear component or part is bonded with or joined to the guiding module. The bonding is configured to allow at least a part of the guided pump beam to overlap and/or evanescently couple into the nonlinear optical material, and the nonlinear optical component or part is configured to convert the guided pump beam in the nonlinear optical material to an un-guided signal mode radiated as an output light signal at a different frequency or an equivalent wavelength.