A wavelength selective switch, including: an optical fiber array, an optical signal processing device and an output selection device. The optical fiber array includes multiple dual-core optical fibers arranged in parallel, one dual-core optical fiber being used for inputting two optical signals; the optical signal processing device is located at an output end of the optical fiber array and is used for splitting the two optical signals into sub-signals of different wavelengths and projecting the sub-signals of different wavelengths to different spectral band regions in the output selection device; and the output selection device is located at the rear end of the optical signal processing device, and is used for processing the sub-signals projected to the spectral band regions, so as to respectively perform output selection on the sub-signals split from two optical signals, thereby achieving a dual-switch function.

Microelectronic assemblies including photonic integrated circuits (PICs), related devices and methods, are disclosed herein. For example, in some embodiments, a photonic assembly may include an integrated circuit (IC) in a first layer including an insulating material, wherein the IC is embedded in the insulating material; a PIC, having an active surface, in a second layer, wherein the second layer is on the first layer, the second layer includes the insulating material, and the PIC is embedded in the insulating material with the active surface facing the first layer and electrically coupled to the IC; and a housing, having an optical lens optically coupled to an internal surface of the housing, attached to the active surface of the PIC and extending from the active surface of the PIC through the insulating material in the first layer, wherein the internal surface of the housing is opposite the active surface of the PIC.

The present disclosure includes a first lens to concentrate light emitted from an inclined output end face of an output end of a light guide; and a photodetector to receive light concentrated by the first lens, wherein when a point of the output end face farthest from the photodetector and a point of the output end face closest to the photodetector are projected onto a plane perpendicular to an optical axis of the first lens, a direction connecting the projected points is taken as a first axis, and an axis perpendicular to the first axis and the optical axis of the first lens is taken as a second axis, the photodetector is located at a position displaced with respect to an optical center of the first lens in a direction of the first axis and a direction of the second axis.

The present disclosure includes a first lens to concentrate light emitted from an inclined output end face of an output end of a light guide; and a photodetector to receive light concentrated by the first lens, wherein when a point of the output end face farthest from the photodetector and a point of the output end face closest to the photodetector are projected onto a plane perpendicular to an optical axis of the first lens, a direction connecting the projected points is taken as a first axis, and an axis perpendicular to the first axis and the optical axis of the first lens is taken as a second axis, the photodetector is located at a position displaced with respect to an optical center of the first lens in a direction of the first axis and a direction of the second axis.

A method of optimizing the coupling to an optical fiber, including: generating a femtosecond laser pulse; directing a focus of the laser pulse to a longitudinal depth in the region beneath the endface of the optical fiber to generate microvoids; adjusting the intensity of the laser pulse at different depths, such that a refractive index profile is created in the region beneath the endface of the optical fiber.

A method of optimizing the coupling to an optical fiber, including: generating a femtosecond laser pulse; directing a focus of the laser pulse to a longitudinal depth in the region beneath the endface of the optical fiber to generate microvoids; adjusting the intensity of the laser pulse at different depths, such that a refractive index profile is created in the region beneath the endface of the optical fiber.

An optical arrangement for disinfection in apparatuses operating with air or a liquid comprises at least one radiation source or at least one group of radiation sources, which emits or jointly emit radiation in the ultraviolet wavelength range, at least one beam collecting optical unit, which collects the radiation emitted by the radiation source or the group of radiation sources, a number of beam delivering optical units, each configured to receive the radiation collected by the at least one beam collecting optical unit, and also a number of effect zones spatially separated from one another, into which the radiation delivered via the beam delivering optical units is emitted in order to bring about a disinfecting effect.

An optical arrangement for disinfection in apparatuses operating with air or a liquid comprises at least one radiation source or at least one group of radiation sources, which emits or jointly emit radiation in the ultraviolet wavelength range, at least one beam collecting optical unit, which collects the radiation emitted by the radiation source or the group of radiation sources, a number of beam delivering optical units, each configured to receive the radiation collected by the at least one beam collecting optical unit, and also a number of effect zones spatially separated from one another, into which the radiation delivered via the beam delivering optical units is emitted in order to bring about a disinfecting effect.

A laser beam delivery system includes an optical beam launcher device and a waveguide assembly. The optical beam launcher device includes an optical relay system that includes a beam splitting optic that is configured to cause a laser beam that is input into the optical beam launcher device to be split into a first laser sub-beam and a second laser sub-beam, cause the first laser sub-beam to transmit to a first region of an input lens of the waveguide assembly, and cause the second laser sub-beam to transmit to a second region of the input lens. The waveguide assembly is configured to transmit the first laser sub-beam and the second laser sub-beam from the input lens to an output lens of the waveguide assembly, wherein the first laser sub-beam and the second laser sub-beam transmit from the waveguide assembly and form an output laser beam.

A laser beam delivery system includes an optical beam launcher device and a waveguide assembly. The optical beam launcher device includes an optical relay system that includes a beam splitting optic that is configured to cause a laser beam that is input into the optical beam launcher device to be split into a first laser sub-beam and a second laser sub-beam, cause the first laser sub-beam to transmit to a first region of an input lens of the waveguide assembly, and cause the second laser sub-beam to transmit to a second region of the input lens. The waveguide assembly is configured to transmit the first laser sub-beam and the second laser sub-beam from the input lens to an output lens of the waveguide assembly, wherein the first laser sub-beam and the second laser sub-beam transmit from the waveguide assembly and form an output laser beam.