摘要:
In one embodiment, an optical system includes a microfluidic chip assembly. The microfluidic chip assembly includes a first structure that provides a first wall of a fluid channel. A second structure provides a second wall of the fluid channel. The second structure includes a diffraction grating configured to provide, in the presence of incident light of a wavelength band of interest on a first surface of the second structure, a plurality of regions of high intensity light within the fluid channel.
摘要:
An apparatus for performing spectroscopy includes a substrate, a photodetector positioned at a distance with respect to the substrate, and a plurality of sub-wavelength grating (SWG) filters positioned between the substrate and the photodetector, in which the SWG filters are to filter different ranges of predetermined wavelengths of light emitted from an excitation location prior to being emitted onto the photodetector.
摘要:
Various embodiments of the present invention are directed to optical fiber coupling systems and to methods for fabricating optical fiber coupling systems. In one aspect, an optical fiber coupling system includes a first resonant cavity abutting the end of an optical fiber. The optical fiber coupling system includes a second resonant cavity located adjacent to the first cavity. The first and second resonant cavities are separated by a sub-wavelength grating layer configured with a non-periodic sub-wavelength grating. The optical fiber coupling system selectively couples light into and/or out of the optical fiber core.
摘要:
Various embodiments of the present invention are directed to optical fiber coupling systems and to methods for fabricating optical fiber coupling systems. In one aspect, an optical fiber coupling system includes a first resonant cavity abutting the end of an optical fiber. The optical fiber coupling system includes a second resonant cavity located adjacent to the first cavity. The first and second resonant cavities are separated by a sub-wavelength grating layer configured with a non-periodic sub-wavelength grating. The optical fiber coupling system selectively couples light into and/or out of the optical fiber core.
摘要:
An optical coupling system and method of fabrication are included. The optical coupling system includes a substrate layer and an optical waveguide material overlying the substrate layer. The optical waveguide material can include a grating. The system also includes a cover material overlying the optical waveguide material to couple an optical signal to the optical waveguide material via the grating at a coupling angle. Approximately zero energy of the coupled optical signal is lost in the substrate layer due to a combination of the coupling angle and a difference in refractive indices between the cover material and the substrate layer.
摘要:
Light-detection systems that do not destroy the light to be detected or change the propagation direction of the light are described. In one aspect, a light-detection system includes an optical element composed of a substrate with a planar surface and a polarization insensitive, high contrast, sub-wavelength grating composed of posts that extend from the planar surface. The posts and/or lattice arrangement of the posts are non-periodically varied to impart orbital angular momentum and at least one helical wavefront on the light transmitted through the optical element.
摘要:
An optical connector includes a first optical fiber and a second optical fiber. A first planar lens is positioned to operate on light exiting the first optical fiber to create a predetermined change in a wave front of the light. A second planar lens is positioned to accept the light from the first planar lens, the second planar lens focusing the light onto the second optical fiber. The first planar lens and second planar lens each include a regularly spaced array of posts with periodically varying diameters.
摘要:
Embodiments of the present invention relate to planar optical devices composed of one or more sub-wavelength diffraction grating layers. In one embodiment, an optical device includes a first substantially planar reflective structure (104,1904), a second substantially planar reflective structure (106,1906), and a substantially planar sub-wavelength grating layer (102,1902) disposed between the first reflective structure and the second reflective structure. The grating layer is configured with lines (208-211,214-217) having line widths, line thicknesses, and line period spacing selected to control phase changes in different portions of a beam of light transmitted through the optical device.
摘要:
An optical connector includes a first optical fiber and a second optical fiber. A first planar lens is positioned to operate on light exiting the first optical fiber to create a predetermined change in a wave front of the light. A second planar lens is positioned to accept the light from the first planar lens, the second planar lens focusing the light onto the second optical fiber. The first planar lens and second planar lens each include a regularly spaced array of posts with periodically varying diameters.
摘要:
Techniques related to optical connectors are described herein. In some examples, an optical connector is illustrated including a ferrule and a mating arrangement to mechanically attach the ferrule to an optical device. The mating element defines an insertion direction. The ferrule includes an optical pathway for light transmission through the ferrule. An end longitudinal section of the optical pathway is to optically couple the optical pathway to the optical device. The end longitudinal section is angled with respect to the insertion direction.