Abstract:
A light coupling element including a groove and a light redirecting member is described. The groove is for receiving and aligning an optical waveguide and incudes an open front end and a back end. The light redirecting member includes an input side for receiving light from an optical waveguide received and supported in the groove and a light redirecting side for changing a direction of light received from the input side. The groove may include a bottom surface extending between the front and back ends of the groove and including a raised bottom surface portion raised upwardly relative to an unraised bottom surface portion. The unraised bottom surface portion of the bottom surface may be disposed between the raised bottom surface portion of the bottom surface and the input side of the light redirecting member. Optical coupling assemblies including the light coupling element and an optical waveguide are described.
Abstract:
An optical connector includes multiple optical subconnectors, wherein each optical subconnector comprises a subconnector housing and one or more optical cable assemblies. The optical connector has two or more housing components, including at least a first housing component and a second housing component. Control of x, y, and z translation of the multiple optical subconnectors is distributed between the first and second housing components such that each housing component controls movement of the optical subconnectors along at least one but not all of the x, y, and z axes.
Abstract:
A coupling unit includes a light coupling element comprising an attachment area for receiving and permanently attaching to a plurality of optical waveguides. One or more grooves are provided at the attachment area. Each groove is configured to receive an optical waveguide and defined by a bottom surface, a first region, a second region, and an opening. The first region is defined between the bottom surface and the second region. The first region in cross section has substantially parallel sidewalls separated by a spacing. The second region is disposed between the first region and the opening. A width of the opening is greater than the spacing.
Abstract:
We describe stacked photovoltaic modules, and components thereof, in which at least one booster cell is combined with at least one primary cell in a stacked configuration. The booster cell may be in the form of a polycrystalline film disposed on a transparent substrate, such as a glass substrate, and the film may be patterned to form multiple booster cells. The booster cell includes an n-type layer and a p-type layer; the n-type layer may include polycrystalline zinc sulfide (ZnS), and the p-type layer may include polycrystalline zinc telluride (ZnTe). The n-type layer may have a band gap energy of at least 3.5 eV, and the p-type layer may have a band gap energy of at least 2 or at least 2.2 eV, or in a range from 2.2 to 2.3 eV. An intrinsic layer, also comprising polycrystalline ZnTe, may reside between the n-type and p-type layers.
Abstract:
A stack of semiconductor layers (310) forms a re-emitting semiconductor construction (RSC). The stack (310) includes an active region (316) that converts light at a first wavelength to light at a second wavelength, the active region (316) including at least one potential well. The stack (310) also includes an inactive region (318) extending from an outer surface of the stack to the active region. Depressions (326) are formed in the stack (310) that extend from the outer surface into the inactive region (318). An average depression depth is at least 50% of a thickness of the inactive region. Alternatively, the average depression depth is at least 50% of a nearest potential well distance. Still other alternative characterizations of the depressions (326) are also disclosed. The depressions (326) may have at least a 40% packing density in plan view. The depressions (326) may also have a substantial portion of their projected surface area associated with obliquely inclined surfaces.
Abstract:
An arrangement of light sources is attached to a semiconductor wavelength converter. Each light source emits light at a respective peak wavelength, and the arrangement of light sources is characterized by a first range of peak wavelengths. The semiconductor wavelength converter is characterized by a second range of peak wavelengths when pumped by the arrangement of light sources. The second range of peak wavelengths is narrower than the first range of peak wavelengths. The semiconductor wavelength converter is characterized by an absorption edge having a wavelength longer than the longest peak wavelength of the light sources. The wavelength converter may also be used for reducing the wavelength variation in the output from an extended light source.
Abstract:
Light emitting devices and methods of fabricating the same are disclosed. The light emitting device includes a light emitting diode (LED) that emits blue or UV light and is attached to a semiconductor construction. The semiconductor construction includes a re-emitting semiconductor construction that includes at least one layer of a II-VI compound and converts at least a portion of the emitted blue or UV light to longer wavelength light. The semiconductor construction further includes an etch-stop construction that includes an AlInAs or a GaInAs compound. The etch-stop is capable of withstanding an etchant that is capable of etching InP.
Abstract:
A light emitting diode (LED) has various LED layers provided on a substrate. A multilayer semiconductor wavelength converter, capable of converting the wavelength of light generated in the LED to light at a longer wavelength, is attached to the upper surface of the LED by a bonding layer. One or more textured surfaces within the LED are used to enhance the efficiency at which light is transported from the LED to the wavelength converter. In some embodiments, one or more surfaces of the wavelength converter is provided with a textured surface to enhance the extraction efficiency of the long wavelength light generated within the converter.
Abstract:
An optical ferrule assembly includes a hybrid optical ferrule having a glass portion assembled to a polymeric portion. The polymeric portion includes a groove for receiving and supporting an optical fiber having opposing open front and back ends. A light redirecting member includes an input surface for receiving light from the optical fiber and a light redirecting side. The open back end of the groove and the input surface define a recessed region therebetween. The glass portion includes an optically transparent glass insert disposed in the recessed region conforming in shape to an internal shape of the recessed region. An optical fiber is received and supported in the groove. The optical fiber includes a fiber end laser welded to the glass insert so that a central light ray from the optical fiber propagates through the glass insert before being received and redirected by the light redirecting side.
Abstract:
A light coupling element including a plurality of waveguide attachment features and a light redirecting member is described. Each attachment feature has an entrance end opposite a terminal end. The entrance ends are arranged at a pitch Pe. The light redirecting member is disposed closer to the terminal ends, and farther from the entrance ends, and includes an input surface, a reflecting side and an exit surface. When a waveguide is attached at each attachment feature, a central light ray emitted by each waveguide enters the light redirecting member through the input surface, is redirected by the reflecting side and exits the light redirecting member at the exit surface, the central light ray intersecting the exit surface at an exit point, each attachment feature corresponding to a different exit point at the exit surface. The exits points are arranged at a pitch Px not equal to Pe.