Abstract:
Techniques and devices for integrating optical fibers on substrates with grooves for various optical applications. Two openings that penetrate through the substrate are formed at both ends of each groove to allow a fiber to pass from one side of substrate to another side. The fiber cladding of a fiber portion positioned in the groove can be removed to produce an optical coupling port.
Abstract:
A radiation detector for detecting ionizing radiation. The detector includes a semiconductor having at least two sides. A bias electrode is formed on one side of the semiconductor. A signal electrode is formed on a side of the semiconductor and is used to detect the energy level of the ionizing radiation. A third electrode (the control electrode) is also formed on the semiconductor. The control electrode shares charges induced by the ionizing radiation with the signal electrode, until the charge clouds are close to the signal electrode. The control electrode also alters the electric field within the semiconductor, such that the field guides the charge clouds toward the signal electrode when the clouds closely approach the signal electrode. As a result, trapping of charge carrying radiation (i.e., electrons or holes) is minimized, and low-energy tailing is virtually eliminated.
Abstract:
Techniques, devices and materials for light source devices that convert excitation light into different light via wavelength conversion materials. One example of a light source includes an excitation light source; a wavelength conversion material that absorbs light from the excitation light source and emits a longer wavelength light; and a layer of a transparent material that has plural optical structures in contact to or in close proximity to the wavelength conversion material to receive the emitted light from the wavelength conversion material and to modify the received light to produce output light with a desired spatial pattern associated with the plural optical structures.
Abstract:
LED packages and their fabrication techniques are disclosed to provide LED package with improved thermal dissipation based on one or more thermally conductive channels or studs. In one implementation, a LED package includes a plastic body structured to have a hole that penetrates through the plastic body; a metal contact formed on the plastic body at one side of the hole to cover the hole; a LED mounted to the metal contact at a location that spatially overlaps with the hole; and a stud formed in the hole in contact with the metal contact at a first end of the stud and extending to an opening of the hole at a second end of the stud, the stud being formed of a thermally conductive material to transfer heat from the LED through the metal contact and the stud to dissipate the heat at the opening of the hole via the second end of the stud.
Abstract:
Fiber optical devices formed on substrates fabricated with grooves that operate based on evanescent optical coupling through a side-polished fiber surface in each fiber involved. A coupling control layer is formed between two fibers to control the evanescent coupling for optical switching operations.
Abstract:
Optical Mach-Zehnder interferometers and related devices, systems that have at least one fiber integrated or engaged to a substrate fabricated with one or more grooves. An integrated optical monitoring mechanism may be implemented in such devices.
Abstract:
Fiber optical devices formed on substrates fabricated with grooves that operate based on evanescent optical coupling through a side-polished fiber surface in each fiber involved. The fiber cladding under the side-polished fiber surface is designed to support a radial mode profile wider than a radial mode profile supported by adjacent fiber portions.
Abstract:
Optical detection of molecules using a biochip having at least one reagent immobilizing area designed to receive one or more reagents and at least one calibration structure with a predetermined height to provide a height reference for optical measurement is disclosed. When the calibration structure is illuminated by a probe beam of light, a first reflected beam of light is reflected off the calibration structure, and a second reflected beam of light is reflected off the reagent immobilizing area. The first reflected beam and the second reflected beam are compared to determine a height at the reagent immobilizing area.
Abstract:
Techniques for constructing a solid-state lighting module that includes solid-state light emitters that emit light of different colors and are selected from separated groups of solid-state light emitters that emit light of two or more separated colors, wherein one or more solid-state light emitters are selected from each of the separated color groups of solid-state light emitters. The lighting module includes a programmable device that stores or remembers desirable optical intensities of the separated color groups of solid-state light emitters, and a control circuit that individually controls light intensity of each of the separated color groups of solid-state light emitters. The light control circuit is coupled to or in communication with the programmable device to receive the desirable optical intensities of the separated groups of solid-state light emitters and is operable to adjust the intensities of the separated color groups of solid-state light emitters based on the desirable intensities.
Abstract:
Optical detection of molecules using a biochip having at least one reagent immobilizing area designed to receive one or more reagents and at least one calibration structure with a predetermined height to provide a height reference for optical measurement is disclosed. When the calibration structure is illuminated by a probe beam of light, a first reflected beam of light is reflected off the calibration structure, and a second reflected beam of light is reflected off the reagent immobilizing area. The first reflected beam and the second reflected beam are compared to determine a height at the reagent immobilizing area.