Abstract: A light microscope comprises: a structuring optical unit comprising a waveguide chip for providing a structured illumination; an input selection device for variably directing light to one of several inputs of the waveguide chip; the waveguide chip further comprising a light guide path following each of the inputs; each light guide path divides into several path divisions; and each path division leads to one output of the wave-guide chip. The outputs of the waveguide chip can be arranged at a pupil plane of the light microscope, and an exit direction of light from the outputs is transverse to a plane defined by the waveguide chip. A method for providing structured illumination light using the light microscope is also described.

Abstract: A light microscope comprises: a structuring optical unit comprising a waveguide chip for providing a structured illumination; an input selection device for variably directing light to one of several inputs of the waveguide chip; the waveguide chip further comprising a light guide path following each of the inputs; each light guide path divides into several path divisions; and each path division leads to one output of the wave-guide chip. The outputs of the waveguide chip can be arranged at a pupil plane of the light microscope, and an exit direction of light from the outputs is transverse to a plane defined by the waveguide chip. A method for providing structured illumination light using the light microscope is also described.

Abstract: A beam combiner is disclosed that comprises a planar lightwave circuit that is based on undoped silicon nitride-based surface waveguides, wherein the planar lightwave circuit comprises a plurality of input ports, a mixing region, and an output port, and wherein the mixing region comprises a plurality of directional couplers that are arranged in a tree structure. Embodiments of the present invention are capable of combining a plurality of light signals characterized by disparate wavelengths on irregular spacings with low loss. Further, the present invention enables high-volume, low cost production of beam combiners capable of combining three or more light signals into a single composite output beam.

Abstract: A scanning projector suitable for projecting an image comprising a plurality of wavelength signals (i.e., light signals having different wavelengths) is disclosed. Embodiments of the present invention comprise a beam combiner comprising a planar lightwave circuit that includes a plurality of surface waveguides arranged in define a plurality of input ports, a mixing region, and an output port. Different wavelength signals received at the input ports are combined into a composite output beam that is scanned over a region. The projector (1) scans a first wavelength signal over a plurality of image points in the region, (2) detects an amount of the first wavelength signal reflected from each image point, whose reflectivity at the first wavelength is based on a measurand, and (3) projects an image onto the region using a second wavelength signal, where the image is based on the reflected first wavelength signal at each of the image points.

Abstract: A scanning projector suitable for projecting an image comprising a plurality of wavelength signals (i.e., light signals having different wavelengths) is disclosed. Embodiments of the present invention comprise a beam combiner comprising a planar lightwave circuit that includes a plurality of surface waveguides arranged in define a plurality of input ports, a mixing region, and an output port. Different wavelength signals received at the input ports are combined into a composite output beam that is scanned over a region. The projector (1) scans a first wavelength signal over a plurality of image points in the region, (2) detects an amount of the first wavelength signal reflected from each image point, whose reflectivity at the first wavelength is based on a measurand, and (3) projects an image onto the region using a second wavelength signal, where the image is based on the reflected first wavelength signal at each of the image points.

Abstract: A scanning projector for projecting an image comprising a plurality of wavelength signals (i.e., light signals having different wavelengths) is disclosed. Embodiments of the present invention comprise a beam combiner comprising a planar lightwave circuit that includes a plurality of surface waveguides arranged to define a plurality of input ports, a mixing region, and an output port. Different wavelength signals received at the input ports are combined into a composite output beam that is scanned over a region. The projector (1) scans a first wavelength signal over a plurality of image points in the region, (2) detects an amount of the first wavelength signal reflected from each image point, whose reflectivity at the first wavelength is based on a measure and, and (3) projects an image onto the region using a second wavelength signal, where the image is based on the reflected first wavelength signal at each of the image points.

Abstract: A beam combiner is disclosed that comprises a planar lightwave circuit that is based on undoped silicon nitride-based surface waveguides, wherein the planar lightwave circuit comprises a plurality of input ports, a mixing region, and an output port, and wherein the mixing region comprises a plurality of directional couplers that are arranged in a tree structure. Embodiments of the present invention are capable of combining a plurality of light signals characterized by disparate wavelengths on irregular spacings with low loss. Further, the present invention enables high-volume, low cost production of beam combiners capable of combining three or more light signals into a single composite output beam.

Abstract: A beam combiner is disclosed that comprises a planar lightwave circuit that is based on undoped silicon nitride-based surface waveguides, wherein the planar lightwave circuit comprises a plurality of input ports, a mixing region, and an output port, and wherein the mixing region comprises a plurality of directional couplers that are arranged in a tree structure. Embodiments of the present invention are capable of combining a plurality of light signals characterized by disparate wavelengths on irregular spacings with low loss. Further, the present invention enables high-volume, low cost production of beam combiners capable of combining three or more light signals into a single composite output beam.

Abstract: A scanning projector for projecting an image comprising multiple wavelength signals is disclosed. Embodiments of the present invention include a beam combiner comprising a planar lightwave circuit having a plurality of surface waveguides arranged to define a plurality of input ports, a mixing region, and an output port. Each input port receives a different wavelength signal and provides it to the mixing region. The mixing region combines the plurality of wavelength signals into a single composite output beam that is scanned over a region to create an image in a region. In some embodiments, the projector (1) interrogates image points in the region using a first wavelength signal to determine a measurand and (2) projects an image over the image points of the region using a second wavelength signal, wherein each image point is illuminated with the second wavelength signal based on a measurand at that image point.

Abstract: A scanning projector suitable for projecting an image comprising a plurality of light signals of different wavelengths is disclosed. Embodiments of the present invention comprise a beam combiner comprising a planar lightwave circuit that includes a plurality of surface waveguides arranged in define a plurality of input ports, a mixing region, and an output port. Each input port receives a different light signal and provides it to the mixing region. The mixing region combines the plurality of into a single composite output beam that is scanned over a region to create an image in a region.

Abstract: An image projection system having a laser projector that projects two differently polarized images on a display region is disclosed. The laser projector enables viewing the two differently polarized images as a three-dimensional image. The image projection system includes a planar lightwave circuit-based beam combiner that enables multiple colors of laser light having different polarization modes to be combined in a single output beam that is scanned over the display region at video rates to produce the two polarized images.

Abstract: A wavelength filter based on a symmetric PLC circuit comprising an MZ filter-based demultiplexer, a waveguide resonator, and an MZ filter-based multiplexer is presented. The wavelength filter is tuned using pulse width modulated drive signals that enable fine wavelength control resolution. Embodiments in accordance with the present invention attain narrow spectral filtering capability over a wide wavelength tuning range. Further, embodiments in accordance with the present invention mitigate chromatic dispersion.

Abstract: A scanning projector for projecting an image comprising multiple wavelength signals is disclosed. Embodiments of the present invention include a beam combiner comprising a planar lightwave circuit having a plurality of surface waveguides arranged to define a plurality of input ports, a mixing region, and an output port. Each input port receives a different wavelength signal and provides it to the mixing region. The mixing region combines the plurality of wavelength signals into a single composite output beam that is scanned over a region to create an image in a region. In some embodiments, the projector (1) interrogates image points in the region using a first wavelength signal to determine a measurand and (2) projects an image over the image points of the region using a second wavelength signal, wherein each image point is illuminated with the second wavelength signal based on a measurand at that image point.

Abstract: An image projection system having a laser projector that projects two differently polarized images on a display region is disclosed. The laser projector enables viewing the two differently polarized images as a three-dimensional image. The image projection system includes a planar lightwave circuit-based beam combiner that enables multiple colors of laser light having different polarization modes to be combined in a single output beam that is scanned over the display region at video rates to produce the two polarized images.

Abstract: A beam combiner is disclosed that comprises a planar lightwave circuit that is based on undoped silicon nitride-based surface waveguides, wherein the planar lightwave circuit comprises a plurality of input ports, a mixing region, and an output port, and wherein the mixing region comprises a plurality of directional couplers that are arranged in a tree structure. Embodiments of the present invention are capable of combining a plurality of light signals characterized by disparate wavelengths on irregular spacings with low loss. Further, the present invention enables high-volume, low cost production of beam combiners capable of combining three or more light signals into a single composite output beam.

Abstract: An apparatus and method are disclosed for decreasing the spectral bandwidth of a semiconductor laser, such as a vertical cavity surface emitting laser.

Abstract: An apparatus and method are disclosed for decreasing the spectral bandwidth of a semiconductor laser, such as a vertical cavity surface emitting laser.

Abstract: A method of operating a communication system comprises a headend station and a plurality of end user stations which are connected to the headend station by means of a physical medium, and a system of one or a plurality of channels realised on this medium. There is an assignment mechanism for assigning a relevant channel to an end user station. More particularly, only a single channel is assigned to an end user station, each channel being assigned to a subset of zero, one or a plurality of end user stations. Controlled by the detection of a channel overload and/or end user dynamics, said assignment mechanism is activated to realise a new assignment of a plurality of channels while the condition is maintained that no more than a single channel is or remains assigned to each one of the end user stations.

Abstract: Polarization-diverse optical devices and related methods are disclosed. In some embodiments, these devices and methods are realized by utilizing a four-port, wavelength-dependent optical coupler that is arranged to receive identical counter-propagating optical signals.

Abstract: Polarization-diverse optical devices and related methods are disclosed. In some embodiments, these devices and methods are realized by utilizing a four-port, wavelength-dependent optical coupler that is arranged to receive identical counter-propagating optical signals.