Aspects relate to devices, systems, and methods for non-invasive testing. The device may include a cartridge that analyzes a nasopharyngeal swabbing sample. The device may also include first and second waveguides, where each waveguide is configured to propagate an electromagnetic (EM) wave.

The present invention relates to an apparatus for optical applications, a spectrometer system and method for producing an apparatus for optical applications, and in particular to an apparatus comprising an optical waveguide having a first refractive index along a light propagation axis interrupted by a plurality of scattering portions having a second refractive index. Each scattering portion has a long axis substantially perpendicular to the light propagation axis as well as a short axis substantially perpendicular to the light propagation axis and the long axis. A receiver unit or a transmitter unit is arranged on a side of the optical waveguide, the long axis being substantially perpendicular, i.e. normal to the plane of this side on which the receiver unit or transmitter unit is arranged. Accordingly, simplification and miniaturization of an optical apparatus can be realized.

Embodiments of the present invention provide an optical structure, an optical coupling method, and a photonic integrated circuit chip. The optical structure includes: two optical coupling structures with different structures, that is, a first optical coupling structure and a second optical coupling structure. The first optical coupling structure includes a first optical transmission structure, and a first coupling port and a second coupling port both connected to the first optical transmission structure. The second optical coupling structure includes a second optical transmission structure, and a third coupling port and a photoelectric conversion structure both connected to the second optical transmission structure. When optical signals are provided in different methods or optical coupling is performed in different scenarios, optical signal coupling can be realized by using optical coupling structures of different structures in the abovementioned optical structure.

Configurations for light source modules and methods for mitigating coherent noise are disclosed. The light source modules may include multiple light source sets, each of which may include multiple light sources. The light emitted by the light sources may be different wavelengths or the same wavelength depending on whether the light source module is providing redundancy of light sources, increased power, coherent noise mitigation, and/or detector mitigation. In some examples, the light source may emit light to a coupler or a multiplexer, which may then be transmitted to one or more multiplexers. In some examples, the light source modules provide one light output and in other examples, the light source modules provide two light outputs. The light source modules may provide light with approximately zero loss and the wavelengths of light may be close enough to spectroscopically equivalent respect to a sample and far enough apart to provide coherent noise mitigation.

An optical fiber holder is disclosed herein that includes at least one confinement slot for routing intermediate optical fibers within a housing of an optical assembly module, and preferably, a plurality of confinement slots for maintaining a target/nominal fiber bending radius for one or more intermediate optical fibers within the housing. Preferably, the optical fiber holder is disposed within the housing of an optical subassembly between an optical component, e.g., a TOSA arrangement and/or ROSA arrangement, and optical coupling receptacles, e.g., LC coupling receptacles, for optically coupling with external fibers for sending and/or receiving optical signals.

An optical device is provided. The optical device includes a fiber array and an optical assembly. The fiber array includes a common channel and a plurality of divided. channels arranged in parallel in a first direction and extending along a second direction, and the fiber array has a first surface from a top view perspective. The optical assembly is coupled to the first surface of the fiber array. The first surface and the common channel of the fiber array form an angle less than 90 degrees from the top view perspective.

A large single-photon avalanche diode (SPAD) array is integrated with optical waveguide (WG) based devices. SPAD is a very sensitive optical detector fabricated on a semiconductor chip and WG structures are also built into the same chip. WG structures are configured to accumulate SPAD detection current. Together, they form an ultra-sensitive optical detector with high-speed response and a large aperture.

A spectral sensor and a method for forming the spectral sensor is disclosed. The spectral sensor includes a planar waveguide on a substrate; a restriction mechanism that restricts a range of angles of incidence of light impinging onto the chirped input coupling grating; the chirped input grating formed to couple incident light into the planar waveguide, wherein the chirped input coupling grating comprises a first transverse chirp to provide a spectrally selective coupling of incident light Into the planar waveguide; a propagation region to filter out light that is not coupled into the planar waveguide; a detector array arranged on the opposite side of the propagation region from the chirped input coupling S grating to receive light coupled out of the planar waveguide and produce output signals representative of the light; and an electrical circuit to readout output signals from the detector array.

An optronic transceiver module is disclosed. The optronic transceiver module includes an m to n main optical coupler capable of splitting a downlink signal into n downlink optical signals of the same power to be transmitted in n optical fibres, a first uplink optical coupler capable of splitting an uplink signal into two optical signals split according to a predetermined reference power ratio and delivering a low-power signal and a high-power signal, a first power measurement photodiode delivering a power measurement associated with a first low-power signal, the main optical coupler being capable of aggregating the high-power optical signal and a second uplink optical signal representative of an optical signal received via a second optical fibre, into an aggregated uplink optical signal.

An image projection system includes a cascaded waveguide system including a first waveguide and a second waveguide arranged downstream along a transmission path from the first waveguide. The first waveguide includes a first output structure and is configured to receive a light beam having a first beam width and output a first expanded light beam at the first output structure, wherein the first expanded light beam has a second beam width greater than the first beam width. The second waveguide includes a second output structure and is configured to receive the first expanded light beam from the first waveguide and output the first expanded light beam multiple times from the second output structure as a plurality of output light beams. Each of the plurality of output light beams is output from a different area of the second output structure along a propagation direction of the second waveguide.