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.

Systems, devices and methods for controlled intramedullary delivery of light (frequencies from about 380 nm to about 500 nm) to treat tissue or bones disorders, including osteomyelitis, by a flexible fiber are provided, where the light is delivered in a circumferential fashion around the fiber, and where the energy delivered from the fiber is of a similar average intensity at the front end and back end of the fiber, and in between. The methods and systems deliver intramedullary light to the canal over long lengths via a minimally invasive pathway to a bone. The methods and systems deliver and maintain a light delivery system within the canal of the bone to provide single or multiple doses of light to kill, eliminate, remove or reduce bacteria, viruses, fungus and pathogens, without removal of the light fiber system, thereby providing single or multiple treatments.

A layer of amorphous Ge is formed on a substrate using electron-beam evaporation. The evaporation is performed at room temperature. The layer of amorphous Ge has a thickness of at least 50 nm and a purity of at least 90% Ge. The substrate is complementary metal-oxide-semiconductor (CMOS) compatible and is transparent at Long-Wave Infrared (LWIR) wavelengths. The layer of amorphous Ge can be used as a waveguide in chemical sensing and data communication applications. The amorphous Ge waveguide has a transmission loss in the LWIR of 11 dB/cm or less at 8 μm.

An optical resonator system includes a multi-strip waveguide structure having spaced semiconductor strips for guiding an IR radiation, a STP resonance structure (STP=slab tamm-plasmon-polariton), wherein the STP resonance structure includes an alternating arrangement of semiconductor strips and interjacent dielectric strips and includes a metal strip adjacent to the semiconductor strip at a boundary region of the STP resonance structure, wherein the metal strip and the adjacent semiconductor strip are arranged to provide a metal-semiconductor interface, and wherein the semiconductor strips of the multi-strip waveguide structure and the semiconductor strips of the STP resonance structure are arranged perpendicular to each other, and an optical coupling structure having a semiconductor layer, wherein the semiconductor layer is arranged between the multi-strip waveguide structure and the STP resonance structure for optically coupling the IR radiation between the multi-strip waveguide structure and the STP resonance structure.

An interconnect for a semiconductor device includes: a carrier; a UV programmable chip mounted on the carrier using a first array of solder connections; a UV light source mounted on the carrier using a second array of solder connections, the UV light source being in optical communication with the UV programmable chip; and a plurality of transmission lines extending on or through the carrier and providing electrical communication between the UV programmable chip and the UV light source.

The present disclosure relates to a light guiding assembly for light exposure of the interior of medical tubes, e.g. for disinfecting said tubes using ultraviolet-C (UVC) light. The light guiding assembly preferably comprises a coupling element, which in the proximal end is connectable to a light source assembly and in the distal end is connectable to a light guiding element. Said light guiding element preferably comprises a liquid filled polymer tube, a distal closure at the distal end of said tube, and a proximal closure comprising a gasket with overflow functionality at the proximal end of said tube. The present disclosure further relates to a method for filling said light guiding assembly.

A terahertz polarization beam splitter based on a two-core negative curvature fiber is provided, which relates to the technical field of optical fiber communication. The polarization beam splitter includes: a base circular tube and core separation structures. Multiple large cladding tubes are internally tangent and connected to an inner wall of the base circular tube and arranged at equal intervals along a circumference of the inner wall of the base circular tube, and the multiple large cladding tubes are symmetrically distributed on the inner wall of the base circular tube. Embedded circular tubes are internally tangent and connected to inner walls of the multiple large cladding tubes respectively. The core separation structures are two in number.

Building blocks are provided for on-chip chemical sensors and other highly-compact photonic integrated circuits combining interband or quantum cascade lasers and detectors with passive waveguides and other components integrated on a III-V or silicon. A MWIR or LWIR laser source is evanescently coupled into a passive extended or resonant-cavity waveguide that provides evanescent coupling to a sample gas (or liquid) for spectroscopic chemical sensing. In the case of an ICL, the uppermost layer of this passive waveguide has a relatively high index of refraction that enables it to form the core of the waveguide, while the ambient air, consisting of the sample gas, functions as the top cladding layer. A fraction of the propagating light beam is absorbed by the sample gas if it contains a chemical species having a fingerprint absorption feature within the spectral linewidth of the laser emission.

Disinfecting devices (100) can include an electromagnetic wave emitting device (EWE device 110) configured to emit UV radiation (115) and a light guide (120) having a front surface (121). The light guide can be configured to distribute UV radiation received from the EWE device across the front surface and be partially transmissive of visible light. UV radiation received by the light guide and distributed across the front surface can function to disinfect the front surface. The device may be configured such that when positioned between a use device (140) and a user (150), the use device is observable through the disinfection device. Methods for disinfecting may similarly include emitting UV radiation into a light guide, reflecting and diffusing UV radiation within the light guide across the front surface of the light guide thereby disinfecting the front surface; and receiving an interaction with a use device through the disinfection device via the front surface from a user.

An optical fiber cable for feed-light transmission includes an optical fiber, a cable sheath, and a phosphor layer. The optical fiber includes a channel of feed light. The cable sheath is located at a periphery of the optical fiber and has a property of shielding the feed light. The phosphor layer is located between the optical fiber and the cable sheath and emits fluorescence upon receiving the feed light. The cable sheath has a property of allowing at least part of the fluorescence emitted by the phosphor layer upon receiving the feed light to pass therethrough.