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:
Apparatuses and systems for analyzing light by mode interference are provided. An example of an apparatus for analyzing light by mode interference includes a number of waveguides to support in a multimode region two modes of the light of a particular polarization and a plurality of scattering objects offset from a center of at least one of the number of waveguides.
摘要:
Apparatuses and systems for analyzing light by mode interference are provided. An example of an apparatus for analyzing light by mode interference includes a number of waveguides to support in a multimode region two modes of the light of a particular polarization and a plurality of scattering objects offset from a center of at least one of the number of waveguides.
摘要:
This disclosure is directed to thermally controlled optical systems. In one aspect, an optical system includes a sub-wavelength grating having a planar geometry and a grating pattern associated with a particular shape of, and direction in which, a wavefront emerges from the grating, when the grating is illuminated by a beam of light. The system includes at least one heating element separately connected to a current source. The current source to inject a current into each heating element to heat a corresponding region of the grating and produce a desired change in the shape of, and/or direction in which, the wavefront emerges from the grating.
摘要:
Apparatuses, systems, and methods for micro-ring optical resonators are provided. An example of a micro-ring optical resonator apparatus includes an array of input waveguides with each input waveguide optically coupled to an array of micro-rings, an output waveguide operatively associated with each of the micro-rings, and a scattering object operatively associated with each of the micro-rings, wherein the scattering object is connected to the output waveguide.
摘要:
Apparatuses, systems, and methods for micro-ring optical resonators are provided. An example of a micro-ring optical resonator apparatus includes an array of input waveguides with each input waveguide optically coupled to an array of micro-rings, an output waveguide operatively associated with each of the micro-rings, and a scattering object operatively associated with each of the micro-rings, wherein the scattering object is connected to the output waveguide.
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:
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.