摘要:
A surface emitting light emitting device with a semiconducting substrate, a semiconducting mirror stack positioned on the substrate surface, a spacer layer positioned on the mirror stack, an active region positioned on the spacer layer, a second spacer layer positioned on the active region, a second semiconducting mirror stack positioned on the second spacer layer, and a top contact layer positioned in contact with the second semiconducting mirror stack. The active region includes multiple quantum wells each having a different transition wavelength and positioned on the spacer layer with the quantum well possessing the longest transition wavelength located closest to the spacer layer and additional quantum wells of the multiple quantum wells positioned in order of decreasing transition wavelength so that the sum of the emission from all of the quantum wells results in a broad and uniform output emission spectrum.
摘要:
A method of growing gallium nitride on a spinel substrate by providing a supporting substrate having a surface, and disposing a plurality of buffer layers on the surface of the supporting substrate. The plurality of buffer layers including a first buffer layer of aluminum oxynitride having a low percentage of mismatch to the spinel substrate. The second buffer layer is disposed on the first buffer layer and includes a plurality of layers of a graded aluminum oxynitride having a low dislocation density. A third buffer layer of aluminum nitride is disposed on the second buffer layer. A fourth buffer layer of gallium nitride is disposed on the third buffer layer. Subsequently, a photonic device structure, such as a laser, LED or detector, an electronic device structure, such as a field effect transistor or modulation doped field effect transistor, or an optical waveguide is fabricated on the fourth buffer layer.
摘要:
Patterned-mirrors for VCSELs are fabricated by forming a first mirror stack of a plurality of pairs of relatively high and low index of refraction layers of AlGaAs, forming an active region of aluminum-free material on the first mirror stack, and forming a second mirror stack of a plurality of pairs of relatively high and low index of refraction layers of AlGaAs. The second mirror stack can be selectively etched to the active region by utilizing the aluminum-free active region as an etch stop.
摘要:
A vertical cavity laser with unstable resonator including a substrate having opposed major surfaces with a first semiconductor mirror stack positioned on one major surface of the substrate, an active region positioned on the first stack and a second semiconductor mirror stack positioned on the active region so as to sandwich the active region between the first and second stacks. Layers of the second stack being etched so as to spatially modulate the thickness of the second stack such that reflectivity is reduced in a central portion of the second stack and increases toward an edge thereof.
摘要:
An interface between a laminated polymer optical waveguide (15) and an electronic device (39). The interface does not degrade the desirable properties of the optical waveguide (15), is simple, is low cost, and is compatible with integrated circuit technology as well as optical and electrical connectors (41,42,43,46). The interface includes at least one vertical cavity surface emitting laser or photosensitive diode (11,37) mounted above the surface of the optical waveguide (15). A mirror (21) positioned at an angle with respect to the optical waveguide (15) serves to reflect light between either the vertical cavity surface emitting laser or photosensitive diode (11,37) and the optical waveguide (15). At least one microstrip line (16) couples electrical signals between the vertical cavity surface emitting laser (11,37) and the electronic device (39).
摘要:
A VCSEL including a first mirror stack, an active region and a second mirror stack positioned on a substrate with portions of the active region and the first and second mirror stacks being offset from surrounding portions by an offset area in the surface of the substrate so as to define a lateral waveguide which confines the operating region of the VCSEL. The surrounding portions of the second mirror stack are removed to provide current control and refractory metal contacts are formed on the upper and lower surfaces. Methods of fabricating the offset as a depression or a mesa in the surface of the substrate and the resulting VCSEL are disclosed.
摘要:
A method is provided for partially collecting light from a polymer waveguide (11, 56). A polymer waveguide (11, 56) is provided, through which a light signal (17) is traveling. A faceted groove (28) is placed in the polymer waveguide (11, 56), thereby reflecting a controllable portion of the light (22) that is traveling through the polymer waveguide (11, 56) from the facet (21) at an oblique angle. Typically, the reflected light is directed into a photodetector (24, 41), which is included into an integrated circuit (52, 53) on a substrate (51).
摘要:
An article and method for manufacturing an optical reading head (400,500) including an optically transparent substrate (100) with a first surface (103) and a second surface (116), wherein the first surface (103) and the second surface (116) are .joined at an angle. Depositing a plurality of layers having an upper portion (114), a middle portion 111, 112, 113), and a lower portion (101) that are optically active on the first and second surfaces (103, 116) of the optically transparent substrate (100). Forming light emitting devices (406, 407) in the plurality of layers on the second surface (116), thereby generating light emitting devices (406, 407) on the angle in the plurality of layers on the second surface (116). Positioning a detection device (402) in a normal plane to the first surface (103).
摘要:
A top-emitting vertical cavity surface emitting laser with a current blocking layer at the substrate and offset layers in the mirror stack providing an optical waveguide aligned to the injected current distribution.
摘要:
An article and method for manufacturing an optical reading head (400,500) including an optically transparent substrate (100) with a first surface (103) and a second surface (116), wherein the first surface (103) and the second surface (116) are joined at an angle. Depositing a plurality of layers having an upper portion (114), a middle portion (111, 112, 113), and a lower portion (101) that are optically active on the first and second surfaces (103, 116) of the optically transparent substrate (100). Forming light emitting devices (406, 407) in the plurality of layers on the second surface (116), thereby generating light emitting devices (406, 407) on the angle in the plurality of layers of the second surface (116). Positioning a detection device (402) in a normal plane to the first surface (103).